PET is an unreinforced, semi-crystalline thermoplastic polyester derived from Polyethylene Terephthalate. It has excellent wear resistance, a low coefficient of friction, a high flexural modulus and superior dimensional stablility, making it a versatile material for designing mechanical and electromechanical parts. Because PET has no center-line porosity, the possibility of fluid absorption and leakage is virtually eliminated. PET has superior performance characteristics, particularly in wear resistance and centerline porosity, giving it an advantage over other materials for applications using solvents, chemicals and food products. It is also used in water purification systems, printing equipment, textile components, food handling equipment and valves.