What happened? PET is a semi-crystalline polymer — and semi-crystalline polymers behave differently depending on whether they crystallize during molding or not. An engineer who has only worked with amorphous polymers like ABS or PC will encounter PET’s crystallization behavior…
PBT plastic — polybutylene terephthalate — is the material that has been answering these reliability demands in electrical and electronic applications for over four decades. Not because it is the strongest engineering thermoplastic, the stiffest, or the cheapest. But because…
POM plastic — formally known as polyoxymethylene, and widely sold under trade names like Delrin® and Celcon — occupies a well-defined space in the engineering thermoplastic lineup: harder than nylon, stiffer than polypropylene, and capable of dimensional tolerances that rival…
You chose acrylic because nothing else looks like it. 92% light transmittance — higher than crown glass. A refractive index of 1.49 that makes light guides glow with surgical precision. Inherent UV stability that lets outdoor signage stay crystal-clear for…
Your enclosure passed the drop test. The surface took paint without adhesion failures. The dimensional report came back clean on the first T1 submission. That’s what a well-executed ABS plastic program looks like — and it’s less common than it…
PC plastic is one of the highest-performance engineering thermoplastics available — and one of the most unforgiving when processed or specified incorrectly. Its combination of extreme impact resistance, optical clarity, and thermal stability is genuinely difficult to replicate with any…
You picked polystyrene because the numbers made sense — 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…
Polyvinyl chloride is the only widely used injection molding thermoplastic that can corrode your equipment, degrade in seconds if overheated, and yet outperform engineering resins in flame retardancy and chemical resistance — all at commodity pricing. This guide explains exactly…
You chose LDPE plastic for the right reasons — flexibility, chemical resistance, low cost, easy processing. Yet the parts warped. The supplier missed the lead time. The dimensions passed inspection but failed in assembly. And somewhere in the post-mortem, nobody…
High-density polyethylene is one of the most cost-effective, chemically resistant, and impact-tough thermoplastics available for injection molding — yet its high shrinkage and warpage tendency trips up engineers who do not design for it from the start. This guide covers…
