{"id":36853,"date":"2026-06-06T04:31:00","date_gmt":"2026-06-06T04:31:00","guid":{"rendered":"https:\/\/dimud.com\/?p=36853"},"modified":"2026-06-04T07:32:52","modified_gmt":"2026-06-04T07:32:52","slug":"pc-plastic-in-injection-molding","status":"publish","type":"post","link":"https:\/\/dimud.com\/es\/pc-plastic-in-injection-molding\/","title":{"rendered":"PC Plastic: The Complete Engineering &amp; Injection Molding Guide"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"36853\" class=\"elementor elementor-36853\" data-elementor-settings=\"{&quot;ha_cmc_init_switcher&quot;:&quot;no&quot;}\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0356189 e-flex e-con-boxed e-con e-parent\" data-id=\"0356189\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9982ac0 elementor-widget elementor-widget-text-editor\" data-id=\"9982ac0\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">PC plastic is one of the highest-performance engineering thermoplastics available \u2014 and one of the most unforgiving when processed or specified incorrectly. Its combination of extreme impact resistance, optical clarity, and thermal stability is genuinely difficult to replicate with any other commodity-accessible material. But polycarbonate&#8217;s sensitivity to moisture, processing temperature, chemical contact, and residual molding stress means that the gap between a correctly executed PC program and a failed one is narrower than engineers often anticipate.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">This guide covers both sides of that equation. Drawing on Dimud&#8217;s production experience across automotive lighting, precision optical components, medical device housings, and robotics\/energy-storage assemblies, it provides the material science, process discipline, mold design logic, and compliance framework that PC programs require to succeed \u2014 from grade selection through first-article approval and into volume production.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-081eaaa e-flex e-con-boxed e-con e-parent\" data-id=\"081eaaa\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b1d1900 elementor-widget elementor-widget-heading\" data-id=\"b1d1900\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What Is PC Plastic?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b065f7c elementor-widget elementor-widget-image\" data-id=\"b065f7c\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"900\" height=\"540\" src=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-polycarbonate-resin.webp\" class=\"attachment-2048x2048 size-2048x2048 wp-image-36909\" alt=\"PC plastic polycarbonate resin\" srcset=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-polycarbonate-resin.webp 900w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-polycarbonate-resin-400x240.webp 400w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-polycarbonate-resin-768x461.webp 768w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-polycarbonate-resin-18x12.webp 18w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aacbc62 elementor-widget elementor-widget-text-editor\" data-id=\"aacbc62\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Polycarbonate \u2014 universally abbreviated as PC plastic \u2014 is an engineering-grade amorphous thermoplastic produced through the polycondensation of bisphenol A (BPA) and phosgene, or via the more environmentally progressive non-phosgene melt transesterification process increasingly adopted by major producers including Covestro, SABIC, and Mitsubishi Chemical.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">The defining feature of PC&#8217;s molecular architecture is the carbonate linkage group (-O-CO-O-) connecting bisphenol A units in a flexible chain. These carbonate groups, combined with the rigid benzene rings from the bisphenol A component, create a dual-character polymer: the benzene rings provide stiffness and heat resistance, while the carbonate linkages allow energy absorption through chain deformation under impact loading. The result is a material that achieves what no single-phase polymer can \u2014 simultaneous high stiffness and high impact resistance, without the brittleness that normally accompanies rigidity.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>What sets PC plastic apart from every engineering thermoplastic at comparable cost:<\/strong><\/p><ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Notched Izod impact strength exceeding 600\u2013850 J\/m \u2014 approximately 10\u00d7 that of PMMA acrylic and 2\u20134\u00d7 that of ABS<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Light transmittance of 88\u201390% in optical grades \u2014 comparable to glass at one-sixth the weight<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Heat deflection temperature of 130\u2013140 \u00b0C at 1.82 MPa \u2014 enabling service in automotive under-hood adjacency and sterilizable medical device components<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Natural UL 94 V-2 flame resistance in standard grades; V-0 in FR-formulated grades \u2014 without the mechanical property penalties that FR additives impose on most other polymers<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Dimensional stability comparable to ABS (shrinkage 0.5\u20130.7%) \u2014 allowing tight tolerances in precision optical and mechanical applications<\/li><\/ul><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>What PC plastic costs you:<\/strong><\/p><ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">High melt viscosity requiring elevated barrel temperatures (260\u2013320 \u00b0C) and higher injection pressures than ABS or PS<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Mandatory pre-drying to &lt; 0.02% moisture \u2014 among the strictest drying requirements in <a href=\"https:\/\/dimud.com\/services\/injection-molding-services\/\">injection molding<\/a><\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Susceptibility to environmental stress cracking (ESC) when combined chemical contact and residual molding stress occur simultaneously<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">UV yellowing in uncoated grades after prolonged outdoor exposure<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Material cost approximately 2\u20133\u00d7 that of ABS \u2014 justified for performance-critical applications, but not for commodity enclosures<\/li><\/ul><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><a href=\"https:\/\/dimud.com\/\">At Dimud<\/a>, PC plastic programs span automotive headlight lens subcomponents, transparent medical device windows, electronic enclosure panels, and structural covers for robotic platforms. Each sector makes different demands on the polycarbonate supply chain \u2014 optical clarity for automotive, biocompatibility certification for medical, flame rating for electronics, and dimensional precision for robotics \u2014 and our engineering team addresses these requirements at DFM stage before tooling is committed.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-08d4b8c e-flex e-con-boxed e-con e-parent\" data-id=\"08d4b8c\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-21f1165 elementor-widget elementor-widget-heading\" data-id=\"21f1165\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Grade Landscape: From General Purpose to Optical and Medical Polycarbonate<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-562a1af elementor-widget elementor-widget-image\" data-id=\"562a1af\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"900\" height=\"540\" src=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-optical-medical-grades.webp\" class=\"attachment-2048x2048 size-2048x2048 wp-image-36910\" alt=\"PC plastic optical medical grades\" srcset=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-optical-medical-grades.webp 900w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-optical-medical-grades-400x240.webp 400w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-optical-medical-grades-768x461.webp 768w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-optical-medical-grades-18x12.webp 18w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4073c46 elementor-widget elementor-widget-text-editor\" data-id=\"4073c46\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">PC plastic is not a single product. The commercial grade landscape covers a wide performance range, and selecting the wrong grade is the most common precursor to field failures in polycarbonate programs.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">General Purpose PC (GP-PC)<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">The baseline: BPA polycarbonate without specialized modification, offering the balanced combination of impact resistance, heat resistance, and optical clarity that defines the polymer&#8217;s appeal. Well-known commercial designations include Lexan\u00ae 141 (SABIC), Makrolon\u00ae 2407 (Covestro), and Calibre\u00ae 301 (Trinseo).<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">GP-PC is the starting point for most PC programs at Dimud. Applications include transparent covers, instrument housings, safety shields, and any component where polycarbonate&#8217;s impact-clarity combination is required without specific regulatory or optical precision demands.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Optical-Grade PC<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Formulated with higher molecular weight, tighter purity control, and reduced colorant and additive loading to achieve:<\/p><ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Light transmittance: 89\u201391%<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Haze: &lt; 1.0% (versus 1.0\u20132.0% for GP-PC)<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Yellowness Index: &lt; 1.5<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Birefringence: minimized through controlled processing orientation<\/li><\/ul><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Optical-grade PC is specified for automotive headlight lenses, light-guide panels in backlit displays, camera lens elements, and precision optical instruments. It requires specialized mold steel (mirror-polished S136 stainless), controlled melt temperature windows (\u00b15 \u00b0C), and slow fill rates to minimize shear-induced optical stress \u2014 all of which are part of Dimud&#8217;s optical PC process protocol.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Flame-Retardant PC (FR-PC)<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Standard PC achieves UL 94 V-2 naturally. FR-formulated grades using phosphorus-based (halogen-free) or sulfonate-based additives achieve:<\/p><ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">UL 94 V-0 at 1.5 mm wall thickness<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Glow wire test compliance per IEC 60695-2-12 at 960 \u00b0C<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Maintained optical clarity (transparent FR-PC available)<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Reduced impact strength relative to GP-PC (typically 400\u2013550 J\/m versus 600\u2013850 J\/m)<\/li><\/ul><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">FR-PC is mandatory for any mains-powered electronics enclosure, data center component, or automotive interior part where both flame compliance and polycarbonate&#8217;s mechanical performance are simultaneously required.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">High-Heat PC and PC Blends<\/h3><div class=\"overflow-x-auto w-full px-2 mb-6\"><table class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"><thead class=\"text-left\"><tr><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Grade<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Modification<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">HDT<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Primary Application<\/th><\/tr><\/thead><tbody><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">High-heat PC<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Alpha-methylstyrene copolymer<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">145\u2013155 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Automotive under-hood, LED housings<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">PC\/ABS blend<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">ABS alloyed for processability<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">105\u2013125 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Automotive B-pillar, laptop shells<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">PC\/PBT blend<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">PBT for chemical resistance<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">120\u2013130 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Automotive exterior, connectors<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">PC\/PMMA blend<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">PMMA for scratch resistance<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">125\u2013135 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Display covers, instrument clusters<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Glass-fiber PC (10\u201330% GF)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Glass fiber reinforcement<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">145\u2013160 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Structural brackets, precision fixtures<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Medical-grade PC<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">USP Class VI \/ ISO 10993<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">130\u2013138 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Device housings, sterilizable components<\/td><\/tr><\/tbody><\/table><\/div><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Commercial Resin Brands and Their Significance<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">For quality-sensitive PC programs \u2014 particularly optical and medical \u2014 the commercial resin brand matters because it determines molecular weight consistency, batch-to-batch color stability, and the availability of regulatory documentation. Dimud sources from:<\/p><ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"><li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>Covestro Makrolon\u00ae<\/strong> \u2014 Preferred for optical automotive applications<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>SABIC Lexan\u00ae<\/strong> \u2014 Preferred for medical-grade and flame-retardant programs<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>Mitsubishi Iupilon\u00ae<\/strong> \/ <strong>LG Chem Lupoy\u00ae<\/strong> \u2014 Cost-competitive alternatives for GP and FR programs<\/li><\/ul><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Resin brand and lot number are documented in every Dimud PC production batch record, with material CoC from the resin producer as a standard deliverable.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-958de80 e-flex e-con-boxed e-con e-parent\" data-id=\"958de80\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e142e94 elementor-widget elementor-widget-heading\" data-id=\"e142e94\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Key Physical and Mechanical Properties<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f29dbe5 elementor-widget elementor-widget-text-editor\" data-id=\"f29dbe5\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"overflow-x-auto w-full px-2 mb-6\"><div class=\"overflow-x-auto w-full px-2 mb-6\"><table class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"><thead class=\"text-left\"><tr><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Property<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">GP-PC<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">FR-PC (V-0)<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Optical-Grade PC<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Test Standard<\/th><\/tr><\/thead><tbody><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Density<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">1.20\u20131.22 g\/cm\u00b3<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">1.20\u20131.25 g\/cm\u00b3<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">1.19\u20131.21 g\/cm\u00b3<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">ISO 1183<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Tensile Strength (yield)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">55\u201370 MPa<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">50\u201365 MPa<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">58\u201368 MPa<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">ISO 527<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Flexural Modulus<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">2,300\u20132,500 MPa<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">2,200\u20132,500 MPa<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">2,300\u20132,600 MPa<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">ISO 178<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Notched Izod Impact<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">600\u2013850 J\/m<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">400\u2013550 J\/m<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">550\u2013750 J\/m<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">ISO 180<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Elongation at Break<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">80\u2013150 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">40\u2013100 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">80\u2013130 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">ISO 527<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Heat Deflection Temp<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">130\u2013140 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">125\u2013135 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">130\u2013138 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">ISO 75 (1.82 MPa)<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Vicat Softening Point<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">145\u2013155 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">140\u2013150 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">147\u2013155 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">ISO 306<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Mold Shrinkage<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">0.5\u20130.7 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">0.4\u20130.7 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">0.5\u20130.6 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">ISO 294-4<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Water Absorption (24h)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">0.15\u20130.35 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">0.15\u20130.30 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">0.10\u20130.20 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">ISO 62<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Light Transmittance<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">88\u201390 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">85\u201389% (clear FR)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">89\u201391 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">ISO 13468<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Haze<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">0.8\u20131.5 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">1.0\u20132.0 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">&lt; 1.0 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">ISO 14782<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Refractive Index<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">1.586<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">1.585<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">1.586<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">ISO 489<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Dielectric Strength<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">15\u201318 kV\/mm<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">14\u201317 kV\/mm<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">15\u201318 kV\/mm<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">IEC 60243<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Flammability (natural)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">UL 94 V-2<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">UL 94 V-0<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">UL 94 V-2<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">UL 94<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Low-Temp Impact (\u221220 \u00b0C)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">No break<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">No break<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">No break<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">ISO 180<\/td><\/tr><\/tbody><\/table><\/div><blockquote class=\"ml-2 border-l-4 border-[hsl(var(--border-300)\/0.1)] pl-4 text-text-300\"><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Dimud Engineering Note \u2014 The Drying Requirement That Changes Everything<\/strong><\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">PC plastic&#8217;s water absorption of 0.15\u20130.35% sounds modest \u2014 but polycarbonate is uniquely sensitive to hydrolytic degradation during processing. Moisture above 0.02% at barrel entry causes chain scission at melt temperature, permanently reducing molecular weight and with it impact strength, optical clarity, and surface quality. Unlike ABS (which tolerates 0.1% moisture), PC requires drying to &lt; 0.02% \u2014 a target that demands dehumidifying hopper dryers at 110\u2013120 \u00b0C for 4\u20136 hours minimum, with desiccant dew point below \u221230 \u00b0C. At Dimud, moisture content is verified by Karl Fischer titration on resin samples before every optical-grade and medical-grade PC production run. This is not optional \u2014 it is the single most common source of PC production failures across the industry.<\/p><\/blockquote><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5aed28e e-flex e-con-boxed e-con e-parent\" data-id=\"5aed28e\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9771ce2 elementor-widget elementor-widget-heading\" data-id=\"9771ce2\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">PC Injection Molding: Process Parameters and Critical Controls<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0625159 elementor-widget elementor-widget-image\" data-id=\"0625159\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"900\" height=\"540\" src=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/polycarbonate-injection-molding-process.webp\" class=\"attachment-2048x2048 size-2048x2048 wp-image-36906\" alt=\"Polycarbonate injection molding process\" srcset=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/polycarbonate-injection-molding-process.webp 900w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/polycarbonate-injection-molding-process-400x240.webp 400w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/polycarbonate-injection-molding-process-768x461.webp 768w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/polycarbonate-injection-molding-process-18x12.webp 18w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a871e67 elementor-widget elementor-widget-text-editor\" data-id=\"a871e67\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">PC plastic is the most demanding commodity-accessible polymer to injection mold correctly. Its high melt viscosity, narrow moisture tolerance, sensitivity to shear degradation, and high mold temperature requirement make process discipline non-negotiable. The following parameters represent validated production settings across Dimud&#8217;s PC programs.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Barrel and Melt Temperature<\/h3><div class=\"overflow-x-auto w-full px-2 mb-6\"><table class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"><thead class=\"text-left\"><tr><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Zone<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">GP-PC \/ FR-PC<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Optical-Grade PC<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">High-Heat PC<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Notes<\/th><\/tr><\/thead><tbody><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Rear (Feed)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">240\u2013260 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">250\u2013265 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">260\u2013275 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Controlled entry; no cold zones<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Middle (Compression)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">260\u2013285 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">270\u2013290 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">280\u2013300 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Primary melting; homogeneity target<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Front (Metering)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">270\u2013300 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">280\u2013305 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">290\u2013315 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Final melt temp; viscosity calibration<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Nozzle<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">260\u2013290 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">270\u2013295 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">280\u2013305 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Reverse-taper nozzle standard for PC<\/td><\/tr><\/tbody><\/table><\/div><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Critical ceiling:<\/strong> PC plastic degrades above 320\u2013330 \u00b0C, releasing bisphenol A monomer and producing yellow discoloration, black specks, and reduced impact strength. Residence time in the barrel must be strictly controlled \u2014 Dimud specifies maximum residence time limits for every PC machine configuration and documents them in the process FMEA.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Mold Temperature<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">PC plastic requires significantly higher mold temperature than most thermoplastics: 80\u2013120 \u00b0C<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">This is the most frequently under-specified parameter in PC programs from engineers accustomed to ABS or PS tooling:<\/p><ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"><li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>80\u201390 \u00b0C:<\/strong> Minimum acceptable; adequate for non-optical structural parts with wall thickness &gt; 3 mm.<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>90\u2013100 \u00b0C:<\/strong> Standard for transparent GP-PC parts; adequate gloss and clarity.<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>100\u2013110 \u00b0C:<\/strong> Required for optical-grade PC lenses, precision prisms, and light-guide panels. Critical for minimizing birefringence and achieving haze &lt; 1.0%.<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>110\u2013120 \u00b0C:<\/strong> Specified for thin-wall optical PC (&lt; 1.5 mm) and high-heat PC grades where crystalline surface structure formation must be controlled.<\/li><\/ul><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Achieving uniform mold temperature at 100\u2013120 \u00b0C requires pressurized hot water temperature controllers (not standard oil units). Dimud&#8217;s PC optical programs use dedicated hot-water mold temperature units and verify mold surface temperature uniformity with thermal imaging before production qualification.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Injection Speed and Pressure<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">PC&#8217;s high melt viscosity requires higher injection pressure than any commodity thermoplastic:<\/p><ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Injection pressure: 100\u2013160 MPa (significantly higher than ABS at 80\u2013140 MPa)<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Hold pressure: 60\u201380% of injection pressure (high; necessary to compensate for PC&#8217;s low compressibility)<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Back pressure: 5\u201315 MPa \u2014 kept low to minimize shear heating and molecular weight reduction<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Injection speed: Slow to moderate \u2014 this is critical and often counterintuitive. Fast injection of PC generates excessive shear stress, particularly at the gate, producing flow-induced birefringence in optical parts and weld-line weakness in structural parts. Controlled fill over 3\u20138 seconds is typical for optical-grade programs.<\/li><\/ul><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Drying Protocol<\/h3><div class=\"overflow-x-auto w-full px-2 mb-6\"><table class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"><thead class=\"text-left\"><tr><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Parameter<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">GP-PC<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Optical-Grade PC<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Medical-Grade PC<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Regrind PC<\/th><\/tr><\/thead><tbody><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Dryer type<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Dehumidifying hopper (dew point \u2264 \u221230 \u00b0C)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Same<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Same<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Same<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Temperature<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">110\u2013120 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">115\u2013120 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">115\u2013120 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">110 \u00b0C<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Duration<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">4\u20136 hours<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">5\u20136 hours<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">5\u20136 hours<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">4\u20135 hours<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Target moisture<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">&lt; 0.02 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">&lt; 0.01 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">&lt; 0.02 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">&lt; 0.02 %<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Verification method<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Moisture analyzer<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Karl Fischer titration<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Karl Fischer titration<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Moisture analyzer<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Max regrind ratio<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">10\u201315 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">0 % (virgin only)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">0 % (virgin only)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2014<\/td><\/tr><\/tbody><\/table><\/div><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Common Defects and Corrective Actions<\/h3><div class=\"overflow-x-auto w-full px-2 mb-6\"><table class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"><thead class=\"text-left\"><tr><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Defect<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Root Cause<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Corrective Action<\/th><\/tr><\/thead><tbody><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Silver streaks \/ splay<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Moisture above 0.02%; hydrolytic degradation<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Extend drying; verify dew point; check hopper seal<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Yellow discoloration \/ brown streaks<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Melt overheating; long residence time<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Reduce barrel temp; rightsize barrel; purge regularly<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Optical haze \/ cloudiness<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Mold temp too low; contamination; moisture<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Raise mold temp to 100\u00b0C+; verify drying; clean tool<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Birefringence \/ stress patterns<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Fill speed too fast; mold temp too low<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Slow injection; raise mold temp; anneal post-mold<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Weld lines (weak \/ visible)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Low melt temp; poor gate positioning<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Raise melt temp; relocate gate; raise mold temp<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Warpage<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Uneven cooling; differential shrinkage<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Balance cooling; uniform wall; post-mold fixture<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Sink marks<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Thick sections; insufficient hold pressure\/time<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Core out thick areas; increase hold pressure<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Cracking \/ ESC<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Chemical contact + residual stress<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Anneal parts; avoid ESC agents; review DFM (see Section 6)<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Short shot<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Pressure insufficient; melt too viscous<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Increase injection pressure; raise barrel temp<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Surface scratch<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Tool steel insufficient hardness for optical<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Specify S136 stainless; SPI A1 polish; handle carefully<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7747ed4 e-flex e-con-boxed e-con e-parent\" data-id=\"7747ed4\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4e2eba8 elementor-widget elementor-widget-heading\" data-id=\"4e2eba8\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Mold Design Considerations for Polycarbonate Components<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e35bb5b elementor-widget elementor-widget-image\" data-id=\"e35bb5b\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"540\" src=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-mold-design-tooling.webp\" class=\"attachment-2048x2048 size-2048x2048 wp-image-36903\" alt=\"PC plastic mold design tooling\" srcset=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-mold-design-tooling.webp 900w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-mold-design-tooling-400x240.webp 400w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-mold-design-tooling-768x461.webp 768w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-mold-design-tooling-18x12.webp 18w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-351bed3 elementor-widget elementor-widget-text-editor\" data-id=\"351bed3\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">PC plastic&#8217;s combination of high melt viscosity, elevated processing temperatures, strict optical requirements, and ESC susceptibility creates mold engineering demands that are more stringent than for ABS or PS. A mold designed for GP-ABS will underperform for optical PC without systematic modification.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Gate Design and Location<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">PC&#8217;s high viscosity demands generously sized gates \u2014 undersized gates generate excessive shear stress that produces:<\/p><ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Birefringence directly downstream of the gate (disqualifying in optical applications)<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Weld-line weakness at flow-front convergences<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Localized molecular weight reduction from shear degradation<\/li><\/ul><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Gate sizing guidelines for PC:<\/strong><\/p><ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Gate thickness: minimum 75\u2013100% of wall thickness at gate location (compared to 60% for ABS)<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Gate land: 0.5\u20131.0 mm maximum<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Fan gates: preferred for flat optical panels and display covers \u2014 distribute fill stress across a wide front, minimizing birefringence concentration<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Submarine gates: acceptable for structural GPPC parts; avoid for optical-grade programs due to shear concentration at gate tip<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Hot-runner valve gates: recommended for high-volume PC programs \u2014 eliminates cold runner, enables precise gate timing to control fill dynamics on thin optical parts<\/li><\/ul><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Runner Design<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">PC requires larger runner cross-sections than ABS or PS to maintain melt temperature and minimize pressure drop:<\/p><ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Full-round runner diameter: 6\u201310 mm (larger than the 4\u20138 mm typical for ABS)<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Runner length: minimized; long runners cause temperature loss that increases apparent viscosity and injection pressure demand<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Hot-runner manifold: recommended for multi-cavity PC tools &gt; 4 cavities; maintains melt temperature uniformity across all drops and eliminates temperature gradient-induced optical variation<\/li><\/ul><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Steel Selection \u2014 Critical for PC<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">PC&#8217;s high processing temperature and optical requirements impose strict steel selection criteria:<\/p><div class=\"overflow-x-auto w-full px-2 mb-6\"><table class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"><thead class=\"text-left\"><tr><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Steel<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Application<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Notes<\/th><\/tr><\/thead><tbody><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">S136 (polishable stainless)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Optical-grade PC: lenses, light guides, prisms<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">SPI A1 mirror polish; corrosion-resistant to PC off-gases<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">718H (pre-hardened stainless)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Medical-grade PC; transparent covers<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Good polishability + corrosion resistance at lower cost than S136<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">H13 (hardened 48\u201352 HRC)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">High-volume GP-PC structural; GF-reinforced PC<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Heat-checking resistance at elevated mold temperatures (100\u00b0C+)<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">P20 (pre-hardened)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Non-cosmetic structural PC (prototype\/low-volume)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Acceptable for short-run programs; not recommended for optical<\/td><\/tr><\/tbody><\/table><\/div><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">P20 is not acceptable for PC optical programs<strong>.<\/strong> At mold temperatures of 100\u2013120 \u00b0C, P20&#8217;s lower hardness leads to accelerated wear on parting lines and gate edges, producing flash and optical surface degradation within 50,000\u2013100,000 shots.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Cooling System Design<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">PC plastic&#8217;s elevated mold temperature requirement (80\u2013120 \u00b0C) demands an active heating and cooling system \u2014 not a passive cooling circuit:<\/p><ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Pressurized hot water temperature controllers (80\u2013120 \u00b0C range) are required; oil temperature controllers may be substituted on non-optical programs (&lt; 100 \u00b0C)<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Cooling channel design targets \u00b13 \u00b0C uniformity across cavity surface \u2014 tighter than the \u00b15 \u00b0C standard for ABS<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">For optical programs, Dimud uses conformal cooling with S136 inserts to achieve surface temperature uniformity critical for haze and birefringence control<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Post-mold annealing fixtures are incorporated in tool design for PC parts with tight dimensional tolerances, to release residual stress that would otherwise cause warpage during service<\/li><\/ul><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Venting<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">PC plastic generates minimal gas during normal processing, but inadequate venting combined with high injection pressure creates diesel effect burn marks at last-fill zones:<\/p><ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Vent depth: 0.03\u20130.05 mm (slightly deeper than ABS to accommodate PC&#8217;s higher fill pressure)<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Vent land: 3\u20135 mm<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Peripheral parting-line venting plus vacuum-assisted venting on deep optical cavity programs<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Ejector pin clearance venting on all deep rib features<\/li><\/ul><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Ejection System<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">PC&#8217;s high impact resistance and good ductility make ejection less fraught than brittle PS, but optical-grade and medical-grade programs impose strict requirements:<\/p><ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">No ejector pins on optical surfaces \u2014 stripper ring or sleeve ejection only on optical parts<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">For transparent GP-PC housings: ejector pins located exclusively in non-cosmetic zones<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Ejection force calculation at DFM stage; PC&#8217;s high stiffness requires higher ejection force than ABS on equivalent draft angles<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Post-ejection annealing recommended for precision optical parts: 120\u2013125 \u00b0C for 2\u20134 hours in a circulating air oven after ejection<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9dd8d6d e-flex e-con-boxed e-con e-parent\" data-id=\"9dd8d6d\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-720e985 elementor-widget elementor-widget-heading\" data-id=\"720e985\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Environmental Stress Cracking: PC's Most Misunderstood Failure Mode<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6ddb550 elementor-widget elementor-widget-image\" data-id=\"6ddb550\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"540\" src=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/polycarbonate-esc-stress-cracking.webp\" class=\"attachment-2048x2048 size-2048x2048 wp-image-36907\" alt=\"Polycarbonate ESC stress cracking\" srcset=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/polycarbonate-esc-stress-cracking.webp 900w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/polycarbonate-esc-stress-cracking-400x240.webp 400w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/polycarbonate-esc-stress-cracking-768x461.webp 768w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/polycarbonate-esc-stress-cracking-18x12.webp 18w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-54b0609 elementor-widget elementor-widget-text-editor\" data-id=\"54b0609\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Environmental stress cracking (ESC) is the single most common root cause of in-service PC plastic failures \u2014 and the failure mode most frequently overlooked during design and specification. Understanding ESC is not optional for engineers specifying polycarbonate components.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">What Is ESC in PC?<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">ESC occurs when residual or applied tensile stress in a molded PC part combines with contact from a specific class of chemical agents \u2014 even at concentrations and exposure durations that would have no effect on an unstressed specimen. The mechanism: chemical agents reduce the activation energy required for crack initiation at the surface. Stress provides the driving force for crack propagation. The two factors together produce cracking at stress levels an order of magnitude below the material&#8217;s measured tensile strength.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>ESC-susceptible chemical classes for PC plastic include:<\/strong><\/p><ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Aromatic hydrocarbons: toluene, xylene (common in paints and adhesives)<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Esters and ketones: acetone, MEK, ethyl acetate (cleaning solvents, adhesive carriers)<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Chlorinated solvents: methylene chloride, trichloroethylene<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Strong alkaline solutions: ammonium hydroxide (window cleaners, disinfectants)<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Certain mold-release agents and lubricants<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Some sunscreens and cosmetic formulations (critical for consumer-facing medical devices)<\/li><\/ul><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>What does NOT cause ESC in PC:<\/strong> Dilute acids, alcohols (isopropanol, ethanol at concentrations &lt; 50%), aliphatic hydrocarbons, many standard cleaning agents.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">How to Prevent ESC in PC Programs<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">ESC prevention at Dimud is a design-stage activity, not a post-failure remediation:<\/p><ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"><li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>Minimize residual molding stress:<\/strong> High mold temperature (100\u00b0C+), slow fill rates, adequate hold pressure, and post-mold annealing reduce the residual stress that is ESC&#8217;s driving force. Dimud includes residual stress management as a standard objective in PC process setup.<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>Identify chemical contact during DFM:<\/strong> Dimud&#8217;s DFM review for PC programs includes a chemical contact audit \u2014 what cleaning agents, adhesives, labels, coatings, and packaging materials will contact the part in assembly, in use, and in logistics?<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>Specify ESC-resistant grades where needed:<\/strong> PC\/PBT blends significantly improve ESC resistance versus GP-PC. For applications with unavoidable chemical exposure, Dimud&#8217;s engineering team recommends and validates the appropriate blend or modified grade.<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>Design stress-free geometry:<\/strong> Generous corner radii (minimum 1.5 mm), uniform wall thickness, and gating that minimizes flow-induced residual stress directly reduce ESC risk.<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>Validate before production:<\/strong> For applications with identified ESC risk, Dimud conducts chemical immersion testing per <a href=\"https:\/\/www.iso.org\/standard\/34861.html\" rel=\"nofollow noopener\" target=\"_blank\">ISO 22088<\/a> or customer-specified protocols on T1 sample parts before production tool qualification is signed off.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7b3ddbd e-flex e-con-boxed e-con e-parent\" data-id=\"7b3ddbd\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a397543 elementor-widget elementor-widget-heading\" data-id=\"a397543\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Industry Applications<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-643b2e9 elementor-widget elementor-widget-text-editor\" data-id=\"643b2e9\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Automotive<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><a href=\"https:\/\/dimud.com\/industries\/automotive\/\">Automotive<\/a> is the largest and most technically demanding end-use sector for PC plastic, where the material&#8217;s combination of impact resistance, optical clarity, and thermal stability addresses requirements that no competing thermoplastic satisfies simultaneously.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Headlight and taillight lens systems (optical-grade PC):<\/strong> PC plastic has displaced glass as the primary material for exterior automotive lighting lenses. The economics are compelling: PC headlight assemblies are 50% lighter than glass equivalents, can be injection-molded into complex aerodynamic geometries impossible in glass, and absorb stone-chip impact without shattering. Optical-grade PC with light transmittance &gt; 88% and haze &lt; 1.0% is the standard specification for projector headlight lenses and LED taillight covers. UV-resistant PC grades or hard-coat post-processing are required to prevent yellowing and surface crazing over the vehicle service life.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Dimud molds headlight-adjacent PC components to automotive optical specifications: yellowness index &lt; 2.0, haze &lt; 1.5%, dimensional tolerance \u00b10.10 mm on lens positioning surfaces, with PPAP Level 3 documentation as standard.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Instrument cluster covers and HMI panels (optical PC \/ PC-PMMA):<\/strong> Transparent covers over instrument clusters, touch-control panels, and infotainment displays. PC provides the scratch resistance (particularly in PC\/PMMA blends), dimensional stability, and anti-reflective coating adhesion that in-cabin display panels require. PC parts in this application are validated against automotive interior fogging test (ISO 6452) and anti-reflective coating adhesion (cross-hatch per ISO 2409).<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Structural interior components (PC\/ABS):<\/strong> B-pillar covers, door panel structural substrates, and center console structural frames. PC\/ABS blends provide the HDT improvement over ABS, better low-temperature impact, and improved weld-line strength that OEM structural specifications demand \u2014 at better processability than straight PC.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>EV battery module covers and thermal management components (FR-PC):<\/strong> With the rapid transition to electric vehicles, FR-PC is increasingly specified for battery module top covers, BMS controller housings, and high-voltage connector bodies \u2014 where the combination of UL 94 V-0 flame rating, dimensional stability under thermal cycling (\u221240 \u00b0C to +120 \u00b0C), and dielectric strength (15\u201318 kV\/mm) addresses all requirements simultaneously.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Medical Devices<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">PC plastic occupies a critical and growing role in <a href=\"https:\/\/dimud.com\/industries\/medical\/\">medical device manufacturing<\/a>, driven by three properties that are difficult to match simultaneously: optical clarity for inspection windows and diagnostic optics, dimensional stability for precision instrument housings, and compatibility with gamma and EO sterilization methods.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Diagnostic device outer housings and inspection windows (medical-grade PC):<\/strong> Blood analyzers, diagnostic imaging accessories, and patient monitoring equipment housings. Medical-grade PC resin certified to USP Class VI and ISO 10993-1 is the required specification for any component that may contact cleaning and disinfection agents. Dimud&#8217;s medical PC programs use virgin-resin-only protocols with documented lot traceability from resin supplier to finished part.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Sterilization-compatible device components (gamma-stable PC):<\/strong> Standard PC is compatible with gamma radiation sterilization up to approximately 25 kGy without significant yellowing \u2014 a meaningful advantage over PC&#8217;s closest competitor, PMMA, which yellows substantially under gamma exposure. For devices requiring both optical clarity and repeated gamma sterilization cycles, PC is the dominant specification choice. Dimud validates gamma stability on sample parts at the specified sterilization dose as part of medical program qualification.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Surgical instrument handles and protective covers (GP-PC \/ GF-PC):<\/strong> PC&#8217;s combination of high impact resistance, chemical compatibility with autoclaving-adjacent disinfectants (note: PC is not autoclavable \u2014 steam at 121\u00b0C exceeds its HDT), and ability to withstand repeated cleaning cycles makes it standard for protective instrument covers and non-sterile structural components in surgical settings.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Microfluidics and lab-on-chip devices (optical-grade PC):<\/strong> PC plastic is the dominant substrate material for microfluidic diagnostic chips and lab-on-chip platforms \u2014 its optical clarity enables fluorescence detection, its dimensional stability allows micrometer-scale channel precision, and its bonding compatibility with solvent and thermal bonding processes enables wafer-scale manufacturing.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Consumer Electronics<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><a href=\"https:\/\/dimud.com\/industries\/electronics\/\">Consumer electronics<\/a> applications for PC plastic are concentrated in programs where the combination of impact resistance and optical transparency is required \u2014 a pairing that eliminates most competing polymers at accessible price points.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Smartphone and tablet protective covers (optical-grade PC):<\/strong> Screen protector panels, back cover windows, and camera lens protection panels in premium mobile devices. PC at 0.4\u20130.8 mm wall thickness provides the impact energy absorption that PMMA at equivalent thickness cannot match. Hard-coat processing (scratch resistance &gt; 3H pencil hardness per ISO 15184) is applied post-molding for consumer electronics PC panels.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Laptop and monitor display bezels (PC\/ABS):<\/strong> PC\/ABS blends are the dominant material for notebook computer display lids and monitor bezels \u2014 providing the dimensional stability and surface quality of PC with the better processability and lower cost of ABS.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>LED lighting covers and diffusers (optical-grade PC \/ UV-stabilized PC):<\/strong> PC light covers combine light transmittance &gt; 88% with the impact resistance that distinguishes PC from PMMA in vandalism-prone applications. UV-stabilized PC grades with hindered amine light stabilizers (HALS) maintain optical clarity over 50,000+ hours of lamp operation without significant yellowing.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Power supply and electrical enclosures (FR-PC):<\/strong> FR-PC at UL 94 V-0 is specified for power adapter housings, battery charger enclosures, and any mains-connected electronics housing where polycarbonate&#8217;s mechanical performance is required alongside flame compliance.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Robotics and Energy Storage<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Robot structural covers and link housings (GP-PC \/ GF-PC):<\/strong> Collaborative robot (cobot) arm covers must be impact-resistant (to protect internal mechanisms from collision events during collaborative operation), lightweight, and dimensionally precise. GP-PC or 10\u201315% GF-PC provides the stiffness-to-weight ratio and dimensional consistency that cobot platform designs require. The high HDT of PC also accommodates the thermal output of servo motor assemblies adjacent to structural covers.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>High-voltage connector housings (FR-PC):<\/strong> EV and energy-storage high-voltage connectors operate at 400V\u2013800V bus voltages where dielectric performance, flame resistance, and dimensional stability under thermal cycling are simultaneously mandatory. FR-PC at UL 94 V-0 with dielectric strength &gt; 15 kV\/mm is the engineered solution that Dimud supplies for this application category \u2014 validated with high-voltage connector housing qualification testing per IEC 60664-1.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Battery management system transparent access windows (optical-grade PC):<\/strong> BMS enclosures in lithium-ion battery modules increasingly incorporate transparent inspection windows that allow visual and infrared inspection of cell surfaces without opening the module. PC plastic at 2\u20133 mm wall thickness provides the combination of optical clarity, impact protection, and flame resistance that this application requires.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>End-effector sensor windows and protective covers (optical-grade PC):<\/strong> Protective covers for vision sensors, LIDAR windows, and structured-light projectors in robotic end-effectors require optical transmittance &gt; 88% in the visible and near-IR spectrum combined with resistance to collision loading. PC optical grade is the standard specification for this application at Dimud.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5b75aaf e-flex e-con-boxed e-con e-parent\" data-id=\"5b75aaf\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2b58ce6 elementor-widget elementor-widget-heading\" data-id=\"2b58ce6\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">PC Plastic vs. Competing Materials<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2eb71ab elementor-widget elementor-widget-image\" data-id=\"2eb71ab\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"540\" src=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-vs-abs-pmma.webp\" class=\"attachment-2048x2048 size-2048x2048 wp-image-36908\" alt=\"PC plastic vs ABS PMMA\" srcset=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-vs-abs-pmma.webp 900w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-vs-abs-pmma-400x240.webp 400w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-vs-abs-pmma-768x461.webp 768w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-vs-abs-pmma-18x12.webp 18w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b215c56 elementor-widget elementor-widget-text-editor\" data-id=\"b215c56\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"overflow-x-auto w-full px-2 mb-6\"><table class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"><thead class=\"text-left\"><tr><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Property<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">PC<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">PC\/ABS<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">PMMA<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">ABS<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">PEI (Ultem)<\/th><\/tr><\/thead><tbody><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Impact Resistance<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2605\u2605<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2605\u2605<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2606\u2606\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2605\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2605\u2606<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Optical Clarity<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2605\u2605<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2606\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2605\u2605<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2606\u2606\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2606\u2606\u2606<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Heat Resistance (HDT)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2605\u2605<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2605\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2606\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2606\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2605\u2605<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Dimensional Stability<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2605\u2605<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2605\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2605\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2605\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2605\u2605<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Chemical Resistance (ESC)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2606\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2606\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2605\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2606\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2605\u2605<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Scratch Resistance<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2606\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2606\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2605\u2605<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2606\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2606\u2606<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Processing Ease<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2606\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2605\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2606\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2605\u2605<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2606\u2606\u2606<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Flame Resistance (natural)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2605\u2606 (V-2)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2606\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2606\u2606\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2606\u2606\u2606 (HB)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2605\u2605 (V-0)<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Raw Material Cost<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">$$$ High<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">$$ Medium<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">$$ Medium<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">$$ Medium<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">$$$$$ Very High<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Gamma Sterilization<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2605\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2606\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2606\u2606\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2606\u2606<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2605\u2605\u2605\u2606\u2606<\/td><\/tr><\/tbody><\/table><\/div><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>PC vs. PMMA:<\/strong> Both offer excellent optical clarity, but PC wins decisively on impact resistance (10\u00d7 PMMA) and gamma sterilization compatibility. PMMA wins on scratch resistance and ESC resistance. For applications where scratch resistance is critical (display panels in high-contact environments), PC with hard-coat is the standard solution.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>PC vs. PC\/ABS:<\/strong> PC\/ABS blends deliver better processability, lower cost, and reduced ESC sensitivity compared to straight PC. For applications where PC&#8217;s full impact performance and thermal resistance are not required, PC\/ABS is the rational cost-down. For optical applications or parts requiring &gt; 120 \u00b0C HDT, straight PC is non-negotiable.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>PC vs. PEI (Ultem):<\/strong> PEI provides higher continuous service temperature (170 \u00b0C), better chemical resistance, and inherent UL 94 V-0 at 0.8 mm \u2014 at 5\u20138\u00d7 PC&#8217;s material cost. PEI is specified when PC&#8217;s thermal ceiling (135\u00b0C HDT) is insufficient; for all applications within PC&#8217;s envelope, PC is the economic choice.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-837b24e e-flex e-con-boxed e-con e-parent\" data-id=\"837b24e\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-539a9d2 elementor-widget elementor-widget-heading\" data-id=\"539a9d2\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">DFM Guidelines for PC Plastic Parts<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-513e2b0 elementor-widget elementor-widget-image\" data-id=\"513e2b0\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"540\" src=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-dfm-wall-thickness.webp\" class=\"attachment-2048x2048 size-2048x2048 wp-image-36904\" alt=\"PC plastic DFM wall thickness\" srcset=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-dfm-wall-thickness.webp 900w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-dfm-wall-thickness-400x240.webp 400w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-dfm-wall-thickness-768x461.webp 768w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/pc-plastic-dfm-wall-thickness-18x12.webp 18w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2c605e5 elementor-widget elementor-widget-text-editor\" data-id=\"2c605e5\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Wall Thickness<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Recommended range: 1.5\u20134.0 mm for structural PC; 0.8\u20132.0 mm for optical thin-wall with high-flow grades.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">PC&#8217;s high melt viscosity makes thin-wall molding (&lt; 1.5 mm) significantly more challenging than for ABS \u2014 higher injection pressure, faster fill, and larger gates are required. Uniform wall thickness is essential: PC&#8217;s relatively low shrinkage (0.5\u20130.7%) is only consistent when wall thickness is uniform; thickness variations above 2:1 ratio generate differential cooling and warpage that exceeds dimensional tolerances on precision parts.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Corner Radii<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Minimum internal corner radius: 1.0 mm. Recommended: 1.5\u20132.0 mm or 50\u201375% of wall thickness.<\/strong><\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">This is a stricter requirement than ABS (0.5 mm minimum). PC&#8217;s high stiffness means stress concentration at sharp corners under ESC conditions initiates cracking at lower applied stress than in more flexible polymers. All internal corners in Dimud&#8217;s PC DFM standard are audited for compliance before tooling proceeds.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Ribs and Bosses<\/h3><ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Rib thickness: 50\u201360% of nominal wall (same rule as ABS, but more critical in PC \u2014 sink marks on opposite surfaces of thick ribs are visible in transparent parts)<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Rib height: maximum 3\u00d7 nominal wall; gussets on taller ribs<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Boss outer diameter: maximum 2\u00d7 nominal wall; cored on all bosses deeper than 8 mm<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">All rib-to-wall and boss-to-wall intersections: filletted (minimum 1.0 mm radius)<\/li><\/ul><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Draft Angles<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">PC&#8217;s high stiffness and moderate shrinkage make it prone to sticking, particularly in deep cavities:<\/p><ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Standard surfaces: 1\u00b0\u20132\u00b0 per side minimum<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Polished optical surfaces (SPI A1\/A2): 1.5\u00b0\u20133\u00b0 per side \u2014 counterintuitively, higher draft is needed for polished PC because the vacuum effect between a high-polish cavity and the cooling PC part resists ejection<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Textured surfaces: add 1\u00b0 per 0.025 mm texture depth (same rule as ABS)<\/li><\/ul><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Tolerances<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">PC plastic&#8217;s low shrinkage and amorphous structure enable excellent dimensional repeatability:<\/p><ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Standard achievable: \u00b10.10\u20130.15 mm on controlled dimensions<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Optical-grade critical dimensions: \u00b10.05\u20130.08 mm achievable with Moldflow-pre-validated tooling and process SPC<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Lens positioning surfaces: \u00b10.05 mm; requires CMM validation on every first-article submission<\/li><\/ul><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Post-Mold Annealing<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">For precision PC parts with tight dimensional tolerances or optical specifications, post-mold annealing is standard at Dimud:<\/p><ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Temperature: 120\u2013125 \u00b0C (below Vicat softening point but above glass transition temperature for stress relaxation)<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Duration: 2\u20134 hours for standard parts; up to 8 hours for thick-section optical components<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Method: Circulating air oven; parts supported in fixtures to prevent sag deformation<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Benefit: Reduces residual molding stress by 40\u201370%, improving ESC resistance and dimensional stability<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-ff20dc7 e-flex e-con-boxed e-con e-parent\" data-id=\"ff20dc7\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-152cee0 elementor-widget elementor-widget-heading\" data-id=\"152cee0\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Dimud's PC Plastic Injection Molding Capabilities<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-76475f3 elementor-widget elementor-widget-image\" data-id=\"76475f3\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"540\" src=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/dimud-polycarbonate-molding-factory.webp\" class=\"attachment-2048x2048 size-2048x2048 wp-image-36905\" alt=\"Dimud polycarbonate molding factory\" srcset=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/dimud-polycarbonate-molding-factory.webp 900w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/dimud-polycarbonate-molding-factory-400x240.webp 400w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/dimud-polycarbonate-molding-factory-768x461.webp 768w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/dimud-polycarbonate-molding-factory-18x12.webp 18w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1e0682f elementor-widget elementor-widget-text-editor\" data-id=\"1e0682f\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"overflow-x-auto w-full px-2 mb-6\"><table class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"><thead class=\"text-left\"><tr><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Service Stage<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Dimud Capability<\/th><th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Customer Benefit<\/th><\/tr><\/thead><tbody><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">DFM &amp; Grade Review<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Grade recommendation; ESC chemical contact audit; corner radius and wall thickness analysis; optical spec validation<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Eliminate the most common PC failure modes before tooling<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Rapid Prototyping<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">SLA\/SLS optical simulation models + aluminum soft tools in GP-PC<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Optical and functional samples in 10\u201315 working days<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Mold Development<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">S136\/718H\/H13 steel; hot-runner valve gate; Moldflow optical simulation; 1\u201364+ cavities<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Production-ready optical tooling; predictable haze and transmittance<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Production Molding<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">50T\u20131,600T machines; hot-water mold temp control 80\u2013120\u00b0C; medical-grade and optical-grade cells<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Precision PC production from pilot to volume<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Post-Mold Operations<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Annealing, hard-coat\/AR coating coordination, pad printing, assembly<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Complete optical and functional sub-assemblies<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Quality Documentation<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">PPAP, CoC, Karl Fischer moisture records, haze\/transmittance reports, CMM, UL 94 certificates<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Audit-ready for automotive, medical, electronics OEMs<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Supply Chain<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Covestro\/SABIC\/Mitsubishi resin sourcing; incoming lot verification; DDP logistics<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Traceable resin from producer to finished part<\/td><\/tr><\/tbody><\/table><\/div><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Dimud&#8217;s three integrated plants \u2014 mold development, CNC machining, and electronics assembly \u2014 operate as a single production system serving customers in <strong>Europe, North America, and the Middle East<\/strong>, where optical component qualification, medical compliance documentation, and automotive PPAP are baseline program expectations.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-74a822d e-flex e-con-boxed e-con e-parent\" data-id=\"74a822d\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-71e0760 elementor-widget elementor-widget-heading\" data-id=\"71e0760\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Frequently Asked Questions<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a18f1c9 elementor-widget elementor-widget-elementskit-accordion\" data-id=\"a18f1c9\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"elementskit-accordion.default\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" >\n        <div class=\"elementskit-accordion accoedion-primary\" id=\"accordion-6a24935e98646\">\n\n            \n                <div class=\"elementskit-card active\">\n                    <div class=\"elementskit-card-header\" id=\"primaryHeading-0-a18f1c9\">\n                        <a href=\"#collapse-14a27c46a24935e98646\" class=\"ekit-accordion--toggler elementskit-btn-link collapsed\" data-ekit-toggle=\"collapse\" data-target=\"#Collapse-14a27c46a24935e98646\" aria-expanded=\"true\" aria-controls=\"Collapse-14a27c46a24935e98646\">\n                            \n                            <span class=\"ekit-accordion-title\">Why does PC plastic require such strict drying \u2014 and what happens if it isn&#039;t dried properly?<\/span>\n\n                            \n                                <div class=\"ekit_accordion_icon_group\">\n                                    <div class=\"ekit_accordion_normal_icon\">\n                                        <!-- Normal Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-down-arrow1\"><\/i>                                    <\/div>\n\n                                    <div class=\"ekit_accordion_active_icon\">\n                                        <!-- Active Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-up-arrow\"><\/i>                                    <\/div>\n                                <\/div>\n\n                            \n                                                    <\/a>\n                    <\/div>\n\n                    <div id=\"Collapse-14a27c46a24935e98646\" class=\" show collapse\" aria-labelledby=\"primaryHeading-0-a18f1c9\" data-parent=\"#accordion-6a24935e98646\">\n\n                        <div class=\"elementskit-card-body ekit-accordion--content\">\n                            <p>PC plastic contains carbonate groups in its backbone that undergo hydrolytic chain scission when moisture is present at melt temperatures (260\u2013320 \u00b0C). At 0.03\u20130.05% moisture (just slightly above the 0.02% limit), molecular weight drops measurably \u2014 producing parts with reduced impact strength, silver streaks on the surface, and degraded optical clarity. At 0.1% moisture (which sounds minor), the effect is severe enough to disqualify optical-grade parts entirely and reduce impact strength by 20\u201340%. Dimud verifies PC moisture content by Karl Fischer titration on all optical and medical programs \u2014 not just by timer. Pre-drying at 110\u2013120 \u00b0C for 4\u20136 hours in a dehumidifying dryer with dew point \u2264 \u221230 \u00b0C is mandatory and non-negotiable on every production run.<\/p>                        <\/div>\n\n                    <\/div>\n\n                <\/div><!-- .elementskit-card END -->\n\n                \n                <div class=\"elementskit-card \">\n                    <div class=\"elementskit-card-header\" id=\"primaryHeading-1-a18f1c9\">\n                        <a href=\"#collapse-33633706a24935e98646\" class=\"ekit-accordion--toggler elementskit-btn-link collapsed\" data-ekit-toggle=\"collapse\" data-target=\"#Collapse-33633706a24935e98646\" aria-expanded=\"false\" aria-controls=\"Collapse-33633706a24935e98646\">\n                            \n                            <span class=\"ekit-accordion-title\">Can PC plastic be sterilized? What methods are compatible?<\/span>\n\n                            \n                                <div class=\"ekit_accordion_icon_group\">\n                                    <div class=\"ekit_accordion_normal_icon\">\n                                        <!-- Normal Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-down-arrow1\"><\/i>                                    <\/div>\n\n                                    <div class=\"ekit_accordion_active_icon\">\n                                        <!-- Active Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-up-arrow\"><\/i>                                    <\/div>\n                                <\/div>\n\n                            \n                                                    <\/a>\n                    <\/div>\n\n                    <div id=\"Collapse-33633706a24935e98646\" class=\" collapse\" aria-labelledby=\"primaryHeading-1-a18f1c9\" data-parent=\"#accordion-6a24935e98646\">\n\n                        <div class=\"elementskit-card-body ekit-accordion--content\">\n                            <p>PC plastic is compatible with <strong>ethylene oxide (EO)<\/strong> and <strong>gamma radiation<\/strong> sterilization \u2014 the two most common methods for single-use medical devices. Gamma compatibility depends on dose: standard PC handles up to approximately 25\u201350 kGy without unacceptable yellowing; specially stabilized gamma-stable PC grades extend this range. PC is <strong>not compatible with steam autoclaving (121 \u00b0C)<\/strong> \u2014 the heat deflection temperature of 130\u2013135 \u00b0C provides insufficient safety margin under steam pressure and thermal cycling, and autoclave conditions accelerate hydrolytic degradation. For steam-sterilizable components, polysulfone (PSU) or PEEK are the standard alternatives.<\/p>                        <\/div>\n\n                    <\/div>\n\n                <\/div><!-- .elementskit-card END -->\n\n                \n                <div class=\"elementskit-card \">\n                    <div class=\"elementskit-card-header\" id=\"primaryHeading-2-a18f1c9\">\n                        <a href=\"#collapse-8a377976a24935e98646\" class=\"ekit-accordion--toggler elementskit-btn-link collapsed\" data-ekit-toggle=\"collapse\" data-target=\"#Collapse-8a377976a24935e98646\" aria-expanded=\"false\" aria-controls=\"Collapse-8a377976a24935e98646\">\n                            \n                            <span class=\"ekit-accordion-title\">What is the difference between PC plastic and PMMA (acrylic) for optical applications?<\/span>\n\n                            \n                                <div class=\"ekit_accordion_icon_group\">\n                                    <div class=\"ekit_accordion_normal_icon\">\n                                        <!-- Normal Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-down-arrow1\"><\/i>                                    <\/div>\n\n                                    <div class=\"ekit_accordion_active_icon\">\n                                        <!-- Active Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-up-arrow\"><\/i>                                    <\/div>\n                                <\/div>\n\n                            \n                                                    <\/a>\n                    <\/div>\n\n                    <div id=\"Collapse-8a377976a24935e98646\" class=\" collapse\" aria-labelledby=\"primaryHeading-2-a18f1c9\" data-parent=\"#accordion-6a24935e98646\">\n\n                        <div class=\"elementskit-card-body ekit-accordion--content\">\n                            <p>Both materials offer excellent optical clarity, but they occupy different performance niches. PMMA provides superior scratch resistance (inherent surface hardness), better chemical resistance to ESC agents, lower cost, and slightly better UV stability in standard grades. PC provides approximately 10\u00d7 higher impact resistance, gamma sterilization compatibility, better thermal stability (HDT 130\u00b0C vs. PMMA's 90\u2013100\u00b0C), and the ability to mold thinner walls without fracture risk. For automotive lighting lenses, optical media, and medical diagnostic optics where impact loading is a design factor, PC is the standard choice. For display panels, signage, and cosmetic optical covers where scratch resistance and ESC resistance are the primary concerns, PMMA or PC with hard-coat is specified.<\/p>                        <\/div>\n\n                    <\/div>\n\n                <\/div><!-- .elementskit-card END -->\n\n                \n                <div class=\"elementskit-card \">\n                    <div class=\"elementskit-card-header\" id=\"primaryHeading-3-a18f1c9\">\n                        <a href=\"#collapse-404eb106a24935e98646\" class=\"ekit-accordion--toggler elementskit-btn-link collapsed\" data-ekit-toggle=\"collapse\" data-target=\"#Collapse-404eb106a24935e98646\" aria-expanded=\"false\" aria-controls=\"Collapse-404eb106a24935e98646\">\n                            \n                            <span class=\"ekit-accordion-title\">How is residual stress managed in injection-molded PC parts?<\/span>\n\n                            \n                                <div class=\"ekit_accordion_icon_group\">\n                                    <div class=\"ekit_accordion_normal_icon\">\n                                        <!-- Normal Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-down-arrow1\"><\/i>                                    <\/div>\n\n                                    <div class=\"ekit_accordion_active_icon\">\n                                        <!-- Active Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-up-arrow\"><\/i>                                    <\/div>\n                                <\/div>\n\n                            \n                                                    <\/a>\n                    <\/div>\n\n                    <div id=\"Collapse-404eb106a24935e98646\" class=\" collapse\" aria-labelledby=\"primaryHeading-3-a18f1c9\" data-parent=\"#accordion-6a24935e98646\">\n\n                        <div class=\"elementskit-card-body ekit-accordion--content\">\n                            <p>Residual stress is an inherent consequence of injection molding \u2014 the polymer is frozen into a non-equilibrium state by rapid cooling. In PC, residual stress contributes to birefringence (in optical parts) and ESC susceptibility (in all parts). Dimud manages residual stress through three mechanisms: (1) Process optimization: slow fill rates, high mold temperature (100\u00b0C+), and adequate hold pressure minimize stress during molding; (2) Post-mold annealing at 120\u2013125 \u00b0C for 2\u20138 hours relaxes residual stress by allowing molecular chain mobility without part deformation; (3) DFM: uniform wall thickness, generous radii, and gate positioning that avoids stress concentration at functional surfaces.<\/p>                        <\/div>\n\n                    <\/div>\n\n                <\/div><!-- .elementskit-card END -->\n\n                \n                <div class=\"elementskit-card \">\n                    <div class=\"elementskit-card-header\" id=\"primaryHeading-4-a18f1c9\">\n                        <a href=\"#collapse-94065136a24935e98646\" class=\"ekit-accordion--toggler elementskit-btn-link collapsed\" data-ekit-toggle=\"collapse\" data-target=\"#Collapse-94065136a24935e98646\" aria-expanded=\"false\" aria-controls=\"Collapse-94065136a24935e98646\">\n                            \n                            <span class=\"ekit-accordion-title\">What tool life can I expect from a PC injection mold?<\/span>\n\n                            \n                                <div class=\"ekit_accordion_icon_group\">\n                                    <div class=\"ekit_accordion_normal_icon\">\n                                        <!-- Normal Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-down-arrow1\"><\/i>                                    <\/div>\n\n                                    <div class=\"ekit_accordion_active_icon\">\n                                        <!-- Active Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-up-arrow\"><\/i>                                    <\/div>\n                                <\/div>\n\n                            \n                                                    <\/a>\n                    <\/div>\n\n                    <div id=\"Collapse-94065136a24935e98646\" class=\" collapse\" aria-labelledby=\"primaryHeading-4-a18f1c9\" data-parent=\"#accordion-6a24935e98646\">\n\n                        <div class=\"elementskit-card-body ekit-accordion--content\">\n                            <p>For standard GP-PC programs in H13 hardened steel: <strong>500,000\u2013800,000 shots<\/strong> with scheduled maintenance. S136 stainless tools for optical-grade programs: <strong>400,000\u2013600,000 shots<\/strong> with careful maintenance and periodic cavity repolishing at 100,000\u2013150,000 shot intervals. GF-PC programs require hardened H13 steel at 48\u201352 HRC with nitrided gate inserts to achieve 500,000+ shots against accelerated abrasive wear. All Dimud PC tooling contracts include guaranteed minimum shot-life commitments with documented maintenance schedules.<\/p>                        <\/div>\n\n                    <\/div>\n\n                <\/div><!-- .elementskit-card END -->\n\n                                                        <script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Why does PC plastic require such strict drying \u2014 and what happens if it isn&#039;t dried properly?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>PC plastic contains carbonate groups in its backbone that undergo hydrolytic chain scission when moisture is present at melt temperatures (260\u2013320 \u00b0C). At 0.03\u20130.05% moisture (just slightly above the 0.02% limit), molecular weight drops measurably \u2014 producing parts with reduced impact strength, silver streaks on the surface, and degraded optical clarity. At 0.1% moisture (which sounds minor), the effect is severe enough to disqualify optical-grade parts entirely and reduce impact strength by 20\u201340%. Dimud verifies PC moisture content by Karl Fischer titration on all optical and medical programs \u2014 not just by timer. Pre-drying at 110\u2013120 \u00b0C for 4\u20136 hours in a dehumidifying dryer with dew point \u2264 \u221230 \u00b0C is mandatory and non-negotiable on every production run.<\/p>\"}},{\"@type\":\"Question\",\"name\":\"Can PC plastic be sterilized? What methods are compatible?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>PC plastic is compatible with <strong>ethylene oxide (EO)<\/strong> and <strong>gamma radiation<\/strong> sterilization \u2014 the two most common methods for single-use medical devices. Gamma compatibility depends on dose: standard PC handles up to approximately 25\u201350 kGy without unacceptable yellowing; specially stabilized gamma-stable PC grades extend this range. PC is <strong>not compatible with steam autoclaving (121 \u00b0C)<\/strong> \u2014 the heat deflection temperature of 130\u2013135 \u00b0C provides insufficient safety margin under steam pressure and thermal cycling, and autoclave conditions accelerate hydrolytic degradation. For steam-sterilizable components, polysulfone (PSU) or PEEK are the standard alternatives.<\/p>\"}},{\"@type\":\"Question\",\"name\":\"What is the difference between PC plastic and PMMA (acrylic) for optical applications?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>Both materials offer excellent optical clarity, but they occupy different performance niches. PMMA provides superior scratch resistance (inherent surface hardness), better chemical resistance to ESC agents, lower cost, and slightly better UV stability in standard grades. PC provides approximately 10\u00d7 higher impact resistance, gamma sterilization compatibility, better thermal stability (HDT 130\u00b0C vs. PMMA's 90\u2013100\u00b0C), and the ability to mold thinner walls without fracture risk. For automotive lighting lenses, optical media, and medical diagnostic optics where impact loading is a design factor, PC is the standard choice. For display panels, signage, and cosmetic optical covers where scratch resistance and ESC resistance are the primary concerns, PMMA or PC with hard-coat is specified.<\/p>\"}},{\"@type\":\"Question\",\"name\":\"How is residual stress managed in injection-molded PC parts?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>Residual stress is an inherent consequence of injection molding \u2014 the polymer is frozen into a non-equilibrium state by rapid cooling. In PC, residual stress contributes to birefringence (in optical parts) and ESC susceptibility (in all parts). Dimud manages residual stress through three mechanisms: (1) Process optimization: slow fill rates, high mold temperature (100\u00b0C+), and adequate hold pressure minimize stress during molding; (2) Post-mold annealing at 120\u2013125 \u00b0C for 2\u20138 hours relaxes residual stress by allowing molecular chain mobility without part deformation; (3) DFM: uniform wall thickness, generous radii, and gate positioning that avoids stress concentration at functional surfaces.<\/p>\"}},{\"@type\":\"Question\",\"name\":\"What tool life can I expect from a PC injection mold?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>For standard GP-PC programs in H13 hardened steel: <strong>500,000\u2013800,000 shots<\/strong> with scheduled maintenance. S136 stainless tools for optical-grade programs: <strong>400,000\u2013600,000 shots<\/strong> with careful maintenance and periodic cavity repolishing at 100,000\u2013150,000 shot intervals. GF-PC programs require hardened H13 steel at 48\u201352 HRC with nitrided gate inserts to achieve 500,000+ shots against accelerated abrasive wear. All Dimud PC tooling contracts include guaranteed minimum shot-life commitments with documented maintenance schedules.<\/p>\"}}]}<\/script>\n                                <\/div>\n    <\/div>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c0cf422 e-flex e-con-boxed e-con e-parent\" data-id=\"c0cf422\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-84cd976 elementor-widget elementor-widget-heading\" data-id=\"84cd976\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Conclusion<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f44945a elementor-widget elementor-widget-text-editor\" data-id=\"f44945a\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">PC plastic occupies a performance position that no other accessible engineering thermoplastic can replicate \u2014 the simultaneous combination of extreme impact resistance, optical transparency, thermal stability to 135\u00b0C, and natural flame resistance defines a material envelope that justifies its premium over ABS and PS for every application within that envelope.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">The applications where PC earns its specification are consistent: automotive optical systems, medical device housings requiring sterilization compatibility, electronics enclosures demanding both impact protection and flame compliance, and robotic\/energy-storage platforms where high-voltage dielectric requirements meet structural loading. In each case, polycarbonate&#8217;s material performance is not just preferred \u2014 it is necessary.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">What makes the difference between a successful PC program and a costly rework cycle is not the material. It is the integration of grade-specific DFM, moisture control discipline, mold temperature management, ESC risk assessment, and a quality system calibrated for the regulatory demands of the target market.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Dimud provides that integrated system \u2014 from <a href=\"https:\/\/dimud.com\/services\/dfm-design\/\">DFM review<\/a> and grade recommendation through production qualification and volume delivery \u2014 for customers whose PC programs cannot afford the friction of a supplier learning curve.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>PC plastic is one of the highest-performance engineering thermoplastics available \u2014 and one of the most unforgiving when processed or specified incorrectly. Its combination of extreme impact resistance, optical clarity, and thermal stability is genuinely difficult to replicate with any other commodity-accessible material. But polycarbonate&#8217;s sensitivity to moisture, processing temperature, chemical contact, and residual molding [&hellip;]<\/p>\n","protected":false},"author":28,"featured_media":36905,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[116,97],"tags":[],"class_list":["post-36853","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-materials","category-guide"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/dimud.com\/es\/wp-json\/wp\/v2\/posts\/36853","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dimud.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dimud.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dimud.com\/es\/wp-json\/wp\/v2\/users\/28"}],"replies":[{"embeddable":true,"href":"https:\/\/dimud.com\/es\/wp-json\/wp\/v2\/comments?post=36853"}],"version-history":[{"count":17,"href":"https:\/\/dimud.com\/es\/wp-json\/wp\/v2\/posts\/36853\/revisions"}],"predecessor-version":[{"id":36914,"href":"https:\/\/dimud.com\/es\/wp-json\/wp\/v2\/posts\/36853\/revisions\/36914"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dimud.com\/es\/wp-json\/wp\/v2\/media\/36905"}],"wp:attachment":[{"href":"https:\/\/dimud.com\/es\/wp-json\/wp\/v2\/media?parent=36853"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dimud.com\/es\/wp-json\/wp\/v2\/categories?post=36853"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dimud.com\/es\/wp-json\/wp\/v2\/tags?post=36853"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}