TEFLON® PTFE - POLYTETRAFLUOROETHYLENE
PTFE is a straight-chain polymer of tetrafluoroethylene. It has a high crystalline melting point (620ºF), very high melt viscosity, and a high maximum use temperature (greater than 500ºF). In addition, it exhibits unusual toughness down to very low temperatures (<-328ºF). It is insoluble in all known solvents and resists attack by most chemicals. Dielectric loss is low, whereas dielectric strength is high; antistick and antifriction properties are most unusual, inert and antiadhesive are the other important characteristics. PTFE is a thermoplastic material with a high chemical resistance rate, as well as nonflammable, radiation resistant, and thermally stable. Applications include ultra pure installations in semiconductor industries, biomedical, pharmaceutical industry, as well as chemical, food, and nuclear waste processing.
TEFLON® PFA - TETRAFLUOROETHYLENE-PERFLUORO-PROPYL VINYL ETHER
Copolymers of PTFE with perfluoro (propyl vinyl ether) are called perfluoroalkoxy (PFA). PFA share the same characteristics with PTFE except that its melting point is 68º below that of PTFE. Because its melt-flow rates and critical shear rates are higher than other copolymers, it allows PFA to be an injection moldable material. PFA has all the other advantages of PTFE such as high working temperature, antistick performance, resistance to virtually all chemicals, low coefficient of friction, nonflammability, and excellent electrical properties. This is a great material suitable for all applications that require a smooth wetted surface to prevent contamination and bacterial growth.