{"id":36809,"date":"2026-06-05T04:06:00","date_gmt":"2026-06-05T04:06:00","guid":{"rendered":"https:\/\/dimud.com\/?p=36809"},"modified":"2026-06-03T08:43:30","modified_gmt":"2026-06-03T08:43:30","slug":"guide-to-ps-plastic-in-injection-molding","status":"publish","type":"post","link":"https:\/\/dimud.com\/ru\/guide-to-ps-plastic-in-injection-molding\/","title":{"rendered":"PS Plastic: The Complete Engineering &amp; Injection Molding Guide"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"36809\" class=\"elementor elementor-36809\" 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-1eb8e29 e-flex e-con-boxed e-con e-parent\" data-id=\"1eb8e29\" 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-55fdaf2 elementor-widget elementor-widget-text-editor\" data-id=\"55fdaf2\" 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]\">You picked polystyrene because the numbers made sense \u2014 low cost, high stiffness, excellent surface finish, optical clarity where you needed it. Then the parts came back brittle. Or the housing cracked under a drop test. Or the medical device OEM asked for a compliance document you didn&#8217;t know existed.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">This guide covers what the datasheets skip \u2014 grade selection logic, brittleness management, process traps, industry-specific compliance, and how to design parts that survive real-world use. Every section draws on<a href=\"https:\/\/dimud.com\/\"> Dimud&#8217;s<\/a> production experience across consumer electronics, medical, automotive, and robotics programs where PS plastic and its modified variants were specified, tested, and refined under production conditions.<\/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-4492c14 e-flex e-con-boxed e-con e-parent\" data-id=\"4492c14\" 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-c118cb2 elementor-widget elementor-widget-heading\" data-id=\"c118cb2\" 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 PS Plastic?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8e446d9 elementor-widget elementor-widget-image\" data-id=\"8e446d9\" 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\/ps-plastic-polystyrene-pellets.webp\" class=\"attachment-2048x2048 size-2048x2048 wp-image-36875\" alt=\"PS plastic polystyrene pellets\" srcset=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/ps-plastic-polystyrene-pellets.webp 900w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/ps-plastic-polystyrene-pellets-400x240.webp 400w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/ps-plastic-polystyrene-pellets-768x461.webp 768w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/ps-plastic-polystyrene-pellets-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-9f90bb5 elementor-widget elementor-widget-text-editor\" data-id=\"9f90bb5\" 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]\">Polystyrene \u2014 commonly abbreviated as PS plastic \u2014 is a vinyl polymer produced by free-radical addition polymerization of styrene monomer (C\u2088H\u2088). Its molecular backbone consists of a long hydrocarbon chain with pendant benzene rings spaced along every other carbon atom. Those benzene rings are the source of both its most valuable properties and its most significant limitations.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>What the benzene rings give 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 rigidity and dimensional stability \u2014 the rings restrict chain mobility, locking the amorphous structure into shape<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Optical transparency in unfilled, unmodified grades<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Natural surface gloss without secondary finishing operations<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Excellent electrical insulation across a wide frequency range<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Low dielectric constant \u2014 critical for high-frequency electronics<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Radiation resistance suitable for gamma and EO sterilization<\/li><\/ul><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>What the benzene rings cost 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\">Brittleness \u2014 limited elongation at break and low notched impact strength<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Susceptibility to aromatic and chlorinated organic solvents<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">A relatively low heat deflection temperature (~70\u201395 \u00b0C depending on grade)<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">UV sensitivity \u2014 yellowing after prolonged outdoor exposure<\/li><\/ul><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Unlike semi-crystalline polymers such as <a href=\"https:\/\/dimud.com\/pp-plastic-injection-molding-guide\/\">PP<\/a> or <a href=\"https:\/\/dimud.com\/a-guide-to-hdpe-plastic-in-injection-molding\/\">HDPE<\/a>, polystyrene is fully amorphous. There are no crystalline domains to melt and recrystallize during cooling. This amorphous nature is what gives PS plastic its low, predictable shrinkage rate (0.4\u20130.7%) \u2014 one of the tightest among commodity thermoplastics \u2014 making it a natural fit for precision components where dimensional consistency matters more than flexibility.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">At Dimud, we process both GPPS and HIPS across programs ranging from diagnostic device housings and consumer electronics enclosures to automotive interior trim and robotic assembly fixtures. The material&#8217;s combination of low shrinkage, excellent surface finish, and cost-effective processing makes it a first choice when the design envelope allows.<\/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-44ce3ad e-flex e-con-boxed e-con e-parent\" data-id=\"44ce3ad\" 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-dcf1d77 elementor-widget elementor-widget-heading\" data-id=\"dcf1d77\" 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: GPPS, HIPS, and Modified Polystyrene<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6bfc3cf elementor-widget elementor-widget-text-editor\" data-id=\"6bfc3cf\" 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]\">The term &#8220;PS plastic&#8221; covers a family of materials with meaningfully different performance profiles. Specifying the wrong grade is the single most common root cause of part failures in polystyrene programs. Understanding the grade landscape before tooling begins is non-negotiable.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">GPPS \u2014 General Purpose Polystyrene<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">GPPS is the base form: pure atactic polystyrene, fully amorphous, with no rubber modification. It is sometimes called crystal polystyrene due to its water-clear optical clarity.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Where GPPS excels:<\/strong> transparent packaging, laboratory consumables, display cases, lenses, light diffusers, and any application where optical clarity and surface gloss are primary requirements. Its brittleness limits structural use, but within its performance envelope it is one of the easiest thermoplastics to mold with high dimensional repeatability.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">HIPS \u2014 High Impact Polystyrene<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">HIPS is produced by polymerizing styrene in the presence of dissolved polybutadiene rubber. The rubber phase forms discrete micro-domains dispersed throughout the PS matrix, acting as crack arrestors under impact loading. The trade-off: opacity increases and optical clarity is lost. HIPS is typically opaque or translucent white in natural form.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Where HIPS excels:<\/strong> appliance housings, refrigerator liners, consumer electronics enclosures, automotive interior panels, and any structural application where occasional impact loading is expected. For Dimud&#8217;s consumer electronics and robotics customers, HIPS is the dominant polystyrene grade \u2014 it provides the dimensional stability and surface quality of GPPS with meaningful improvement in toughness.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Modified and Compounded PS Grades<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Beyond base GPPS and HIPS, several commercially important modified grades are processed at Dimud:<\/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\">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\">Key Benefit<\/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\">Typical 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\">FR-HIPS<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Flame retardant additives<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">UL 94 V-0 \/ V-1 compliance<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Electronics enclosures, IT equipment<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Glass-filled PS<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">10\u201330% short glass fiber<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">2\u20133\u00d7 stiffness improvement<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Structural fixtures, automotive brackets<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Mineral-filled PS<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Calcium carbonate \/ talc<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Improved HDT, reduced cost<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Appliance components, packaging<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">ESD PS<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Conductive carbon additives<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Static dissipation (10\u2076\u201310\u00b9\u00b9 \u03a9\/sq)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Semiconductor trays, electronics 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 PS<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">USP Class VI compliant resin<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Biocompatibility<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Diagnostic devices, lab consumables<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">UV-stabilized PS<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">HALS + UV absorbers<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Outdoor durability<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">POS displays, light fixtures<\/td><\/tr><\/tbody><\/table><\/div><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Dimud&#8217;s engineering team reviews grade options at <a href=\"https:\/\/dimud.com\/services\/dfm-design\/\">DFM<\/a> stage \u2014 not after tooling is complete. Selecting the right PS variant before steel is cut prevents the costly scenario of reformulating a program mid-stream because the base-grade parts failed a regulatory test or a drop simulation.<\/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-4d49336 e-flex e-con-boxed e-con e-parent\" data-id=\"4d49336\" 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-8cdeb4a elementor-widget elementor-widget-heading\" data-id=\"8cdeb4a\" 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-556b632 elementor-widget elementor-widget-image\" data-id=\"556b632\" 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\/polystyrene-mechanical-properties-testing.webp\" class=\"attachment-2048x2048 size-2048x2048 wp-image-36878\" alt=\"polystyrene mechanical properties testing\" srcset=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/polystyrene-mechanical-properties-testing.webp 900w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/polystyrene-mechanical-properties-testing-400x240.webp 400w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/polystyrene-mechanical-properties-testing-768x461.webp 768w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/polystyrene-mechanical-properties-testing-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-695fb56 elementor-widget elementor-widget-text-editor\" data-id=\"695fb56\" 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]\">The table below consolidates typical property values for GPPS and HIPS across the test standards most commonly referenced in engineering drawings, material approval documents, and regulatory submissions.<\/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\">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\">GPPS<\/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\">HIPS<\/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><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\">Engineering Implication<\/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\">1.04\u20131.06 g\/cm\u00b3<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">1.03\u20131.06 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><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Lightweight; competitive with ABS at lower cost<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Tensile Strength<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">35\u201360 MPa<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">14\u201342 MPa<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">ISO 527<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">GPPS rigid structural; HIPS toughened enclosures<\/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\">3,100\u20133,500 MPa<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">1,700\u20132,800 MPa<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">ISO 178<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">High stiffness; minimal deflection under load<\/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\">1\u20133 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">15\u201350 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">ISO 527<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">GPPS brittle; HIPS significantly more ductile<\/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\">1\u20133 kJ\/m\u00b2<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">6\u201315 kJ\/m\u00b2<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">ISO 180<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">HIPS required for any drop or impact risk<\/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\">75\u201395 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">70\u201385 \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><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Not suitable for continuous elevated temperatures<\/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\">90\u2013103 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">82\u201396 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">ISO 306<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">EO sterilization compatible; not autoclavable<\/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\">0.4\u20130.7 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">0.3\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><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Among the lowest of commodity plastics \u2014 precision-friendly<\/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\">0.03\u20130.10 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">0.05\u20130.15 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">ISO 62<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Near-zero; no pre-drying required in most conditions<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Dielectric Constant<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">2.4\u20132.7<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">2.4\u20132.7<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">IEC 60250<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Excellent electrical insulation; low RF signal loss<\/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\u201392 %<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Opaque<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2014<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">GPPS competes with acrylic for low-cost optical parts<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Surface Gloss<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">High (mirror possible)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Medium-high<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">\u2014<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Minimizes secondary finishing cost<\/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 Low Shrinkage Advantage<\/strong><\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">PS plastic&#8217;s shrinkage rate of 0.4\u20130.7% is the tightest among commodity thermoplastics \u2014 roughly 3\u20135\u00d7 lower than LDPE or PP. In precision housing programs where multi-component assemblies require consistent snap-fit engagement, this predictable shrinkage allows Dimud to hold tighter cavity sizing tolerances and reduce first-article adjustment cycles. For electronics customers running 64-cavity production tools, this translates directly into shorter qualification timelines and lower part-to-part dimensional variation at volume.<\/p><\/blockquote>\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-61c0b6a e-flex e-con-boxed e-con e-parent\" data-id=\"61c0b6a\" 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-7bfed88 elementor-widget elementor-widget-heading\" data-id=\"7bfed88\" 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\"> Injection Molding Process Parameters and Best Practices<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-49203ae elementor-widget elementor-widget-text-editor\" data-id=\"49203ae\" 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]\">Polystyrene is regarded as one of the most process-friendly thermoplastics available. Its low melt viscosity, broad processing window, and compatibility with most gate geometries make it accessible even on lower-tonnage equipment. That said, its brittleness and sensitivity to shear degradation at elevated temperatures require disciplined process control to prevent quality failures at volume.<\/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\">GPPS<\/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\">HIPS<\/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\">160\u2013180 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">170\u2013190 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Conservative entry; prevents premature softening<\/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\">180\u2013210 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">190\u2013220 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Primary melt zone; 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\">200\u2013230 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">210\u2013240 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Melt temperature control; 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\">195\u2013220 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">205\u2013230 \u00b0C<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Slightly cooler to prevent drool<\/td><\/tr><\/tbody><\/table><\/div><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Critical warning:<\/strong> PS plastic degrades above 270 \u00b0C with release of volatile styrene monomer. Residence time at elevated temperatures must be minimized \u2014 particularly on small-shot programs running in large machines. Dimud&#8217;s process engineers verify residence time at machine qualification and flag high-risk configurations before production release.<\/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]\">Recommended mold temperature range: <strong>20\u201360 \u00b0C<\/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\"><strong>Lower range (20\u201335 \u00b0C):<\/strong> Faster cycle, matte surface, suitable for structural HIPS parts where cosmetics are secondary.<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>Upper range (40\u201360 \u00b0C):<\/strong> Improved surface gloss, reduced weld-line visibility, better optical clarity for GPPS parts. Critical for transparent covers, display panels, and medical device windows.<\/li><\/ul><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">For high-gloss HIPS consumer electronics housings, Dimud targets 45\u201355 \u00b0C mold temperature combined with SPI A1 or A2 polished cavity steel to achieve Class A cosmetic surfaces without post-mold painting.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Injection Speed and Pressure<\/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\">Injection pressure: 70\u2013140 MPa (lower than engineering polymers due to PS&#8217;s good flow)<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Hold pressure: 50\u201370% of injection pressure<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Back pressure: 5\u201315 MPa \u2014 low; excessive back pressure degrades molecular weight and increases brittleness in production<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Screw speed: 60\u2013100 RPM; moderate to preserve rubber-phase integrity in HIPS<\/li><\/ul><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Drying Requirements<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Under standard storage conditions, polystyrene requires no pre-drying \u2014 water absorption below 0.15% makes moisture-induced splay rare. Dimud applies regrind control protocols as standard: maximum 20% regrind ratio, maximum three regrind cycles, and 60\u201370 \u00b0C \/ 1\u20132 hour pre-dry on any regrind lot exposed to ambient humidity.<\/p><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\">Most Likely 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\">Brittle fracture at ejection<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Sharp internal corners; insufficient draft<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Add minimum 0.5 mm radii; increase draft to 1.5\u00b0<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Jetting \/ snake-skin<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Gate too small; injection speed too high<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Enlarge gate; reduce fill speed; use fan gate<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Weld lines (visible or weak)<\/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 position<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Raise melt temp 10\u201315 \u00b0C; reposition gate<\/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<\/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\">Silver streaks \/ splay<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Overheating or moisture in regrind<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Reduce barrel temp; dry regrind; check residence time<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Part sticking in tool<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Insufficient draft; over-packed cavity<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Reduce hold pressure; polish core; increase draft<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Yellowing \/ discoloration<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Degradation at high barrel temp<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Reduce temperature; purge; check residence time<\/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; gate imbalance<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Balance cooling channels; adjust gate location<\/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-d099ecd e-flex e-con-boxed e-con e-parent\" data-id=\"d099ecd\" 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-5c429af elementor-widget elementor-widget-heading\" data-id=\"5c429af\" 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 Polystyrene Components<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-61fd9bd elementor-widget elementor-widget-image\" data-id=\"61fd9bd\" 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\/polystyrene-injection-mold-design.webp\" class=\"attachment-2048x2048 size-2048x2048 wp-image-36879\" alt=\"polystyrene injection mold design\" srcset=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/polystyrene-injection-mold-design.webp 900w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/polystyrene-injection-mold-design-400x240.webp 400w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/polystyrene-injection-mold-design-768x461.webp 768w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/polystyrene-injection-mold-design-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-e270d5b elementor-widget elementor-widget-text-editor\" data-id=\"e270d5b\" 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\">Gate Selection and Sizing<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">PS plastic&#8217;s low viscosity makes it compatible with virtually all gate types \u2014 edge, submarine (tunnel), fan, pin-point, and hot-runner valve gates:<\/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>Fan gates<\/strong> are preferred for flat, transparent GPPS panels where uniform fill and minimal weld lines are critical.<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>Submarine gates<\/strong> work well for HIPS structural housings in multi-cavity tools; they provide automatic degating and reduce post-processing labor.<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>Hot-runner systems<\/strong> are recommended for high-volume consumer electronics programs \u2014 eliminating runner scrap, reducing cycle time, and improving gate cosmetics on visible HIPS surfaces.<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Gate land length should be minimized to 0.5\u20131.0 mm to reduce shear stress and prevent stress-whitening in transparent GPPS 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]\">Full-round runners (4\u20138 mm diameter) minimize pressure drop. For balanced multi-cavity tools \u2014 standard in high-volume electronics and medical consumables \u2014 Dimud uses naturally balanced runner layouts (H-pattern or radial) to ensure simultaneous fill across all cavities. In 16- to 64-cavity PS tools, runner balance directly determines part-to-part weight consistency and dimensional uniformity.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Steel Selection and Surface Finish<\/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\">Steel 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\">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\">Rationale<\/th><\/tr><\/thead><tbody><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\">Standard HIPS production molds<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">500,000+ shot life on unfilled grades<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">H13 (hardened)<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Glass-filled PS; abrasive compounds<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Wear resistance at gate and cavity surfaces<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">S136 \/ 420SS stainless<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Medical-grade GPPS<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Corrosion resistance + SPI A1 polishability<\/td><\/tr><\/tbody><\/table><\/div><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Surface texture significantly affects final part appearance on PS plastic:<\/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\">Optical-grade GPPS: SPI A1 or A2 polish (mirror finish)<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Consumer electronics HIPS: Matte texture (MT-11040 or equivalent) to conceal fingerprints<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Automotive interior HIPS: Leather-grain texture (VDI 30\u201333) per OEM specification<\/li><\/ul><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Ejection System Design<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Polystyrene&#8217;s brittleness creates ejection risk with poorly placed pins. Dimud applies the following rules on every PS program:<\/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\">Maximize pin contact area \u2014 use blade ejectors or stripper plates on thin-wall sections in preference to small-diameter point pins.<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Never place ejector pins at sharp corners or thin ribs \u2014 stress concentration at pin contact points causes fracture initiation, particularly in GPPS.<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Stripper plate ejection is standard for transparent GPPS parts where pin witness marks on cosmetic surfaces are unacceptable.<\/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]\">PS plastic&#8217;s rapid fill speed requires adequate mold venting to prevent burn marks (diesel effect) 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: 0.02\u20130.03 mm for GPPS; 0.025\u20130.04 mm for HIPS<\/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 ejector pin clearance venting on deep ribs is Dimud&#8217;s standard configuration<\/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-02af08c e-flex e-con-boxed e-con e-parent\" data-id=\"02af08c\" 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-dceddeb elementor-widget elementor-widget-heading\" data-id=\"dceddeb\" 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-4aac232 elementor-widget elementor-widget-image\" data-id=\"4aac232\" 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\/ps-plastic-industry-applications.webp\" class=\"attachment-2048x2048 size-2048x2048 wp-image-36876\" alt=\"PS plastic industry applications\" srcset=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/ps-plastic-industry-applications.webp 900w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/ps-plastic-industry-applications-400x240.webp 400w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/ps-plastic-industry-applications-768x461.webp 768w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/ps-plastic-industry-applications-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-a597446 elementor-widget elementor-widget-text-editor\" data-id=\"a597446\" 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\">Consumer Electronics<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Consumer electronics is the highest-volume application sector for injection-molded PS plastic globally, and Dimud&#8217;s most active domain for this material family. Polystyrene delivers the surface quality, dimensional precision, and cost structure that high-volume electronics programs demand.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Device enclosures and rear covers (FR-HIPS):<\/strong> TV rear housings, set-top box shells, router enclosures, and speaker cabinets. FR-HIPS provides impact resistance, dimensional stability, a paintable or directly texturable surface, and UL 94 V-0 compliance for mains-powered devices. This combination is difficult to replicate at equivalent cost with any other commodity thermoplastic.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Display light diffusers and bezels (GPPS):<\/strong> The 88\u201392% light transmittance of GPPS makes it a cost-effective alternative to acrylic for light diffusion panels, indicator lenses, and display bezels. For programs where optical performance is required but polycarbonate&#8217;s cost premium is unjustified, GPPS is the default specification at Dimud.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>ESD-dissipative handling fixtures (ESD PS):<\/strong> Semiconductor packaging trays, component handling fixtures, and PCB storage inserts from carbon-loaded PS protect sensitive components from electrostatic discharge. Dimud produces ESD PS fixtures with surface resistivity verification to ANSI\/ESD S20.20 as part of standard lot acceptance testing.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Internal structural brackets (HIPS):<\/strong> Internal chassis brackets, PCB standoffs, and wire routing guides \u2014 invisible components where material cost and tight tolerances matter more than aesthetics. The low shrinkage of PS plastic makes it ideal for these fit-critical parts.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Medical and Diagnostic Devices<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Medical-grade PS plastic occupies a defined and growing role in diagnostic and laboratory device manufacturing, driven by polystyrene&#8217;s exceptional radiation resistance \u2014 enabling gamma and EO sterilization without significant mechanical or optical degradation.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Diagnostic test cassette housings (GPPS):<\/strong> Lateral flow assay cassettes for point-of-care diagnostics are among the highest-volume injection-molded GPPS applications globally. The material&#8217;s transparency allows optical reading of results windows, while its dimensional stability ensures consistent reagent pad positioning across production lots. Dimud has produced multi-million-unit volumes of diagnostic cassette components for customers across European and North American markets.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Microplate systems (GPPS):<\/strong> 96-well, 384-well, and 1536-well microplates for drug discovery and clinical diagnostics. GPPS provides optical clarity, low background fluorescence, and the dimensional precision (inter-well position tolerance: \u00b10.1 mm) required for automated liquid handling compatibility.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Petri dishes and cell culture vessels (GPPS):<\/strong> Standard laboratory consumables where optical clarity, gamma sterilization compatibility, and low adsorption of biological molecules are essential. Medical-grade GPPS certified to USP Class VI and ISO 10993 is the required specification for these applications.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Specimen containers and diagnostic packaging (HIPS):<\/strong> Impact resistance and chemical compatibility for sample transport containers, slide mailers, and specimen collection kits.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Dimud operates dedicated clean production cells for medical PS components, with resin lot certification, material traceability records, and batch CoC as standard deliverables.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Automotive Interior<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">PS plastic has a long-established role in automotive interior systems, where its combination of rigidity, dimensional stability, and surface quality addresses the cost-optimization pressure that defines Tier-1 supply. Applications concentrate in non-structural interior components within climate-controlled cabin environments.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Interior trim panels and door pull covers (HIPS):<\/strong> HIPS is the workhorse material for painted and textured interior trim surfaces \u2014 instrument panel inserts, pillar covers, and glove box liners. Leather-grain textured HIPS achieves premium haptic quality at commodity material cost.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Air vent bezels and register surrounds (HIPS):<\/strong> Dimensional stability under vehicle HVAC temperature cycling (typically -30 \u00b0C to +85 \u00b0C) is a key selection driver; HIPS performs reliably within this range without the warpage risk of softer polymers.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Infotainment and switch bezel surrounds (FR-HIPS):<\/strong> Flame-retardant HIPS is increasingly specified for in-cabin electronics surrounds as OEMs integrate larger display and control surfaces into dashboard systems.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Interior lighting lenses (GPPS):<\/strong> Ambient lighting lenses and instrument cluster light pipes where optical clarity is required at lower cost than polycarbonate.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Dimud supplies automotive PS components to IATF 16949-aligned quality standards, with PPAP Level 3 documentation, FMVSS 302 flammability compliance records, and dimensional reports as standard deliverables.<\/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>Sensor enclosures and structural brackets (HIPS):<\/strong> Proximity sensor housings, encoder covers, and mounting brackets for robotic arms benefit from HIPS&#8217;s stiffness, tight dimensional tolerances, and machinability for post-mold secondary operations.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Battery cell spacers and module insulators (FR-HIPS \/ ESD PS):<\/strong> In lithium-ion battery module assembly, inter-cell spacers and insulating separators are injection-molded from flame-retardant HIPS or ESD PS compounds \u2014 providing both dielectric isolation and controlled static discharge at cell surfaces.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Assembly jigs and test fixtures (HIPS):<\/strong> Production-line jigs and functional test fixtures manufactured from HIPS for their dimensional stability, machinability, and low material cost. HIPS tooling fixtures provide repeatability across shift changes and thermal cycling that softer polymers cannot match.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>Cable management and wiring accessories (FR-HIPS):<\/strong> Wiring harness clips, conduit brackets, and cable tie mounts in robot base assemblies and battery pack wiring systems \u2014 where flame-retardant compliance is increasingly required by OEM safety standards.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><a href=\"https:\/\/dimud.com\/services\/prototype-creation\/\">Dimud&#8217;s rapid prototyping pathway<\/a> \u2014 3D-printed concept models validated against aluminum soft-tool sample runs before committing to production steel \u2014 supports robotics customers whose development cycles are compressed by fast-moving market timelines.<\/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-66d5360 e-flex e-con-boxed e-con e-parent\" data-id=\"66d5360\" 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-ef02c09 elementor-widget elementor-widget-heading\" data-id=\"ef02c09\" 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\">PS Plastic vs. Competing Materials<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d78a150 elementor-widget elementor-widget-text-editor\" data-id=\"d78a150\" 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 \/ Factor<\/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\">GPPS<\/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\">HIPS<\/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\">PP<\/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><\/tr><\/thead><tbody><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\u2606\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><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><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Rigidity \/ Stiffness<\/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\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><\/tr><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\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\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\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\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\u2605\u2606<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Surface Finish Quality<\/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\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><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Heat Resistance<\/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><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\u2605\u2605<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Radiation Sterilizability<\/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\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\">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\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\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\u2606\u2606<\/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\">$ Low<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">$ Low<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">$$ Medium<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">$ Low<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">$$$ High<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Chemical 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\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><\/tr><\/tbody><\/table><\/div><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>PS vs. ABS:<\/strong> HIPS is typically 15\u201325% lower in raw material cost than ABS and achieves higher natural surface gloss. ABS wins where tougher impact performance, better chemical resistance, or stronger weld-line strength is required and opacity is acceptable.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>PS vs. PC:<\/strong> For non-impact-critical optical applications, GPPS costs significantly less than polycarbonate and sterilizes with gamma radiation without yellowing \u2014 a decisive advantage for medical consumables. PC wins where impact performance, high-temperature service, or long-term UV stability are required.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"><strong>PS vs. PP:<\/strong> PS provides significantly better dimensional stability (lower shrinkage) and surface finish. PP wins where chemical resistance, high-temperature service, or living hinge functionality are required.<\/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-904f8b6 e-flex e-con-boxed e-con e-parent\" data-id=\"904f8b6\" 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-b53ea7a elementor-widget elementor-widget-heading\" data-id=\"b53ea7a\" 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 PS Plastic Parts<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ccddafd elementor-widget elementor-widget-image\" data-id=\"ccddafd\" 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\/ps-plastic-dfm-part-design.webp\" class=\"attachment-2048x2048 size-2048x2048 wp-image-36877\" alt=\"PS plastic DFM part design\" srcset=\"https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/ps-plastic-dfm-part-design.webp 900w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/ps-plastic-dfm-part-design-400x240.webp 400w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/ps-plastic-dfm-part-design-768x461.webp 768w, https:\/\/dimud.com\/wp-content\/uploads\/2026\/06\/ps-plastic-dfm-part-design-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-856e4ff elementor-widget elementor-widget-text-editor\" data-id=\"856e4ff\" 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: 1.0\u20134.0 mm for structural parts; 0.5\u20131.5 mm for thin-wall packaging or medical consumables with high-flow grades.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Uniform wall thickness is more critical for PS than for flexible polymers \u2014 differential residual stress in thick\/thin transitions can cause brittle fracture in service, particularly in GPPS. Where walls must transition, taper over a minimum distance of 3\u00d7 the thickness change on the non-cosmetic face.<\/p><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Corner Radii \u2014 The Most Critical DFM Rule for PS<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Sharp internal corners are the primary failure mode in injection-molded polystyrene. Stress concentrations at zero-radius corners under impact, thermal cycling, or ejection force cause fracture initiation that propagates through the part.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Minimum internal corner radius: 0.5 mm. Recommended: 1.0 mm or 25\u201350% of wall thickness.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Every DFM review Dimud conducts on PS programs includes a mandatory corner radius audit of the 3D model before any tooling quotes are issued. This is non-negotiable on GPPS programs and strongly enforced on HIPS.<\/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 to prevent sink marks on the opposite surface<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Rib height: maximum 3\u00d7 nominal wall; taller ribs require draft and fillets at base<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Boss outer diameter: maximum 2\u00d7 nominal wall; cored bosses preferred on thick sections<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Boss-to-wall connection: always filletted at base (minimum 0.5 mm radius)<\/li><\/ul><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Draft Angles<\/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\">Polished GPPS surfaces: minimum 0.5\u00b0 per side (1\u00b0 preferred)<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Textured HIPS surfaces: 1.5\u00b0\u20133\u00b0 per side depending on texture depth (VDI 30 requires approximately 3\u00b0 minimum)<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Deep ribs (height &gt; 5 mm): 1\u00b0 minimum with polished core surfaces<\/li><\/ul><h3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\">Achievable Tolerances<\/h3><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">PS plastic&#8217;s low shrinkage enables tighter dimensional tolerances than most commodity polymers:<\/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: \u00b10.10\u20130.15 mm on controlled critical dimensions<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Fine (process-optimized): \u00b10.05\u20130.08 mm on short dimensions &lt; 50 mm<\/li><li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Multi-component assemblies (snap-fits, light-pipe alignment): Dimud recommends tolerance stack-up analysis before tool design freeze<\/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-dc9ae17 e-flex e-con-boxed e-con e-parent\" data-id=\"dc9ae17\" 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-5eae46c elementor-widget elementor-widget-heading\" data-id=\"5eae46c\" 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 PS Plastic Injection Molding Capabilities<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d2a67d2 elementor-widget elementor-widget-text-editor\" data-id=\"d2a67d2\" 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 Review<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Grade recommendation, corner radius audit, wall thickness analysis, Moldflow pre-validation<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Eliminate design-driven failures 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 models + aluminum soft tools in GPPS or HIPS<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">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\">P20 \/ H13 \/ S136; hot-runner; 1\u2013128 cavities<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Production-ready tooling with guaranteed shot-life commitment<\/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; FR-HIPS, ESD PS, medical-grade GPPS<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Pilot to multi-million annual volumes<\/td><\/tr><tr><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Secondary Operations<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Pad printing, hot stamping, ultrasonic welding, sub-assembly<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Finished cosmetic 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, CMM reports, UL file support, material traceability<\/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<\/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\">Resin sourcing, incoming QC, outbound inspection, DDP logistics<\/td><td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Single point of accountability<\/td><\/tr><\/tbody><\/table><\/div><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Dimud&#8217;s export programs serve customers in Europe, North America, and the Middle East \u2014 markets where regulatory documentation, English-language engineering communication, and consistent on-time delivery are minimum expectations, not differentiators.<\/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-6217dc9 e-flex e-con-boxed e-con e-parent\" data-id=\"6217dc9\" 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-8134703 elementor-widget elementor-widget-heading\" data-id=\"8134703\" 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-9ec62f9 elementor-widget elementor-widget-elementskit-accordion\" data-id=\"9ec62f9\" 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-6a2343160a1ba\">\n\n            \n                <div class=\"elementskit-card active\">\n                    <div class=\"elementskit-card-header\" id=\"primaryHeading-0-9ec62f9\">\n                        <a href=\"#collapse-feb92886a2343160a1ba\" class=\"ekit-accordion--toggler elementskit-btn-link collapsed\" data-ekit-toggle=\"collapse\" data-target=\"#Collapse-feb92886a2343160a1ba\" aria-expanded=\"true\" aria-controls=\"Collapse-feb92886a2343160a1ba\">\n                            \n                            <span class=\"ekit-accordion-title\">Can PS plastic be painted or bonded?<\/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-feb92886a2343160a1ba\" class=\" show collapse\" aria-labelledby=\"primaryHeading-0-9ec62f9\" data-parent=\"#accordion-6a2343160a1ba\">\n\n                        <div class=\"elementskit-card-body ekit-accordion--content\">\n                            <p>GPPS and HIPS accept water-based and UV-cured paint systems without primer in most cases. Solvent-based coatings containing aromatic hydrocarbons (toluene, MEK, acetone) will craze or dissolve PS surfaces \u2014 these must be avoided. For bonding, PS is one of the easiest thermoplastics to solvent-weld using methylene chloride or ethyl acetate; cyanoacrylate and two-part epoxies also perform reliably. Ultrasonic welding is Dimud's standard approach for HIPS housing assemblies.<\/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-1-9ec62f9\">\n                        <a href=\"#collapse-52eb2666a2343160a1ba\" class=\"ekit-accordion--toggler elementskit-btn-link collapsed\" data-ekit-toggle=\"collapse\" data-target=\"#Collapse-52eb2666a2343160a1ba\" aria-expanded=\"false\" aria-controls=\"Collapse-52eb2666a2343160a1ba\">\n                            \n                            <span class=\"ekit-accordion-title\">What is the difference between HIPS and ABS for electronics enclosures?<\/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-52eb2666a2343160a1ba\" class=\" collapse\" aria-labelledby=\"primaryHeading-1-9ec62f9\" data-parent=\"#accordion-6a2343160a1ba\">\n\n                        <div class=\"elementskit-card-body ekit-accordion--content\">\n                            <p>HIPS is typically 15\u201325% lower in raw material cost, achieves higher natural gloss, and sterilizes reliably under gamma radiation. ABS provides better impact strength at low temperatures, superior chemical resistance, and stronger weld-line performance. For consumer electronics enclosures not requiring drop-test certification, FR-HIPS at UL 94 V-0 is the cost-optimized choice. For industrial electronics or drop-rated devices, ABS is the safer structural selection.<\/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-2-9ec62f9\">\n                        <a href=\"#collapse-f23fc0b6a2343160a1ba\" class=\"ekit-accordion--toggler elementskit-btn-link collapsed\" data-ekit-toggle=\"collapse\" data-target=\"#Collapse-f23fc0b6a2343160a1ba\" aria-expanded=\"false\" aria-controls=\"Collapse-f23fc0b6a2343160a1ba\">\n                            \n                            <span class=\"ekit-accordion-title\">Is polystyrene safe for food contact and medical 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-f23fc0b6a2343160a1ba\" class=\" collapse\" aria-labelledby=\"primaryHeading-2-9ec62f9\" data-parent=\"#accordion-6a2343160a1ba\">\n\n                        <div class=\"elementskit-card-body ekit-accordion--content\">\n                            <p>Food-grade GPPS and HIPS comply with FDA 21 CFR 177.1640 and EU Regulation 10\/2011 when produced from compliant resin with verified additive systems. Medical-grade GPPS certified to USP Class VI and ISO 10993-1 is widely used for diagnostic consumables, laboratory plasticware, and diagnostic packaging. Dimud provides full material certification, CoC, and compliance documentation for both food-contact and medical-grade PS programs.<\/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-3-9ec62f9\">\n                        <a href=\"#collapse-234a24a6a2343160a1ba\" class=\"ekit-accordion--toggler elementskit-btn-link collapsed\" data-ekit-toggle=\"collapse\" data-target=\"#Collapse-234a24a6a2343160a1ba\" aria-expanded=\"false\" aria-controls=\"Collapse-234a24a6a2343160a1ba\">\n                            \n                            <span class=\"ekit-accordion-title\">Is PS plastic suitable for outdoor 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-234a24a6a2343160a1ba\" class=\" collapse\" aria-labelledby=\"primaryHeading-3-9ec62f9\" data-parent=\"#accordion-6a2343160a1ba\">\n\n                        <div class=\"elementskit-card-body ekit-accordion--content\">\n                            <p>Standard GPPS and HIPS are not recommended for prolonged outdoor exposure without UV stabilization \u2014 the benzene ring in the molecular structure is susceptible to UV-induced photo-oxidation, causing yellowing and surface crazing over 6\u201318 months. UV-stabilized PS grades (HALS + UV absorbers) extend outdoor service life to 3\u20135 years for moderate-exposure applications. For demanding outdoor use, ASA (acrylonitrile-styrene-acrylate) is the natural upgrade path \u2014 same processing window as HIPS with inherently superior UV durability.<\/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-4-9ec62f9\">\n                        <a href=\"#collapse-92741266a2343160a1ba\" class=\"ekit-accordion--toggler elementskit-btn-link collapsed\" data-ekit-toggle=\"collapse\" data-target=\"#Collapse-92741266a2343160a1ba\" aria-expanded=\"false\" aria-controls=\"Collapse-92741266a2343160a1ba\">\n                            \n                            <span class=\"ekit-accordion-title\">What tool life can I expect from a PS 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-92741266a2343160a1ba\" class=\" collapse\" aria-labelledby=\"primaryHeading-4-9ec62f9\" data-parent=\"#accordion-6a2343160a1ba\">\n\n                        <div class=\"elementskit-card-body ekit-accordion--content\">\n                            <p>For standard HIPS programs in P20 steel: <strong>500,000 to 1,000,000 shots<\/strong> with proper maintenance. Glass-filled PS reduces tool life due to gate and cavity wear \u2014 H13 hardened steel restores expected life to 500,000+ shots. Dimud provides guaranteed minimum shot-life commitments in tooling contracts, with scheduled preventive maintenance intervals and cavity inspection records as standard deliverables.<\/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\":\"Can PS plastic be painted or bonded?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>GPPS and HIPS accept water-based and UV-cured paint systems without primer in most cases. Solvent-based coatings containing aromatic hydrocarbons (toluene, MEK, acetone) will craze or dissolve PS surfaces \u2014 these must be avoided. For bonding, PS is one of the easiest thermoplastics to solvent-weld using methylene chloride or ethyl acetate; cyanoacrylate and two-part epoxies also perform reliably. Ultrasonic welding is Dimud's standard approach for HIPS housing assemblies.<\/p>\"}},{\"@type\":\"Question\",\"name\":\"What is the difference between HIPS and ABS for electronics enclosures?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>HIPS is typically 15\u201325% lower in raw material cost, achieves higher natural gloss, and sterilizes reliably under gamma radiation. ABS provides better impact strength at low temperatures, superior chemical resistance, and stronger weld-line performance. For consumer electronics enclosures not requiring drop-test certification, FR-HIPS at UL 94 V-0 is the cost-optimized choice. For industrial electronics or drop-rated devices, ABS is the safer structural selection.<\/p>\"}},{\"@type\":\"Question\",\"name\":\"Is polystyrene safe for food contact and medical applications?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>Food-grade GPPS and HIPS comply with FDA 21 CFR 177.1640 and EU Regulation 10\/2011 when produced from compliant resin with verified additive systems. Medical-grade GPPS certified to USP Class VI and ISO 10993-1 is widely used for diagnostic consumables, laboratory plasticware, and diagnostic packaging. Dimud provides full material certification, CoC, and compliance documentation for both food-contact and medical-grade PS programs.<\/p>\"}},{\"@type\":\"Question\",\"name\":\"Is PS plastic suitable for outdoor applications?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>Standard GPPS and HIPS are not recommended for prolonged outdoor exposure without UV stabilization \u2014 the benzene ring in the molecular structure is susceptible to UV-induced photo-oxidation, causing yellowing and surface crazing over 6\u201318 months. UV-stabilized PS grades (HALS + UV absorbers) extend outdoor service life to 3\u20135 years for moderate-exposure applications. For demanding outdoor use, ASA (acrylonitrile-styrene-acrylate) is the natural upgrade path \u2014 same processing window as HIPS with inherently superior UV durability.<\/p>\"}},{\"@type\":\"Question\",\"name\":\"What tool life can I expect from a PS injection mold?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"<p>For standard HIPS programs in P20 steel: <strong>500,000 to 1,000,000 shots<\/strong> with proper maintenance. Glass-filled PS reduces tool life due to gate and cavity wear \u2014 H13 hardened steel restores expected life to 500,000+ shots. Dimud provides guaranteed minimum shot-life commitments in tooling contracts, with scheduled preventive maintenance intervals and cavity inspection records as standard deliverables.<\/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-0b4381d e-flex e-con-boxed e-con e-parent\" data-id=\"0b4381d\" 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-52cb54d elementor-widget elementor-widget-heading\" data-id=\"52cb54d\" 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-fda6583 elementor-widget elementor-widget-text-editor\" data-id=\"fda6583\" 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]\">PS plastic is not a single material. It is a family whose performance can be tuned from water-clear optical components to impact-resistant structural enclosures to flame-retardant electronics housings \u2014 depending on which grade you specify and how you engineer the mold.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">The engineers who get consistent results from polystyrene treat grade selection, corner radius design, and mold cooling as an integrated system. A perfect cavity in the wrong grade, or a correct grade in a mold with zero-radius corners, produces the same outcome: field failures and rework.<\/p><p class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\">Dimud manages all three variables simultaneously \u2014 from DFM review through production qualification \u2014 so your PS program arrives at volume with the dimensional consistency, surface quality, and regulatory documentation your customers require.<\/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>You picked polystyrene because the numbers made sense \u2014 low cost, high stiffness, excellent surface finish, optical clarity where you needed it. Then the parts came back brittle. Or the housing cracked under a drop test. Or the medical device OEM asked for a compliance document you didn&#8217;t know existed. This guide covers what the [&hellip;]<\/p>\n","protected":false},"author":28,"featured_media":36875,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[116,97],"tags":[],"class_list":["post-36809","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-materials","category-guide"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/dimud.com\/ru\/wp-json\/wp\/v2\/posts\/36809","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dimud.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dimud.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dimud.com\/ru\/wp-json\/wp\/v2\/users\/28"}],"replies":[{"embeddable":true,"href":"https:\/\/dimud.com\/ru\/wp-json\/wp\/v2\/comments?post=36809"}],"version-history":[{"count":13,"href":"https:\/\/dimud.com\/ru\/wp-json\/wp\/v2\/posts\/36809\/revisions"}],"predecessor-version":[{"id":36882,"href":"https:\/\/dimud.com\/ru\/wp-json\/wp\/v2\/posts\/36809\/revisions\/36882"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dimud.com\/ru\/wp-json\/wp\/v2\/media\/36875"}],"wp:attachment":[{"href":"https:\/\/dimud.com\/ru\/wp-json\/wp\/v2\/media?parent=36809"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dimud.com\/ru\/wp-json\/wp\/v2\/categories?post=36809"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dimud.com\/ru\/wp-json\/wp\/v2\/tags?post=36809"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}