Ertalyte® is a family of unreinforced, semi-crystalline thermoplastic polyester based on polyethylene terephthalate (PET-P) products. The specific properties of virgin crystalline PET make it especially suitable for the manufacture of mechanical precision parts must endure high loads and wear conditions.

Ertalyte® PET-P products are characterized as having excellent dimensional stability coupled with excellent wear resistance, a low coefficient of friction, high strength, and resistance to moderately acidic solutions. Ertalyte®'s continuous service temperature is 210°F (100°C) and its melting point is almost 150°F higher than acetals. It retains significantly more of its original strength up to 180°F (85°C) than nylon or acetal. For food-grade PET-P, Ertalyte® grades are excellent candidates for parts used in the food processing and equipment industries.