Teflon is a registered trademark and brand name of the DuPont company for products made from three types of fluorine-containing polymers (fluoropolymers). Teflon-PTFE is a Polytetrafluoroethylene used in GoreTex and nonstick cookware. Teflon-PFA is a Perfluoroalkoxy used to make tubes. Teflon-FEP is a Fluorinated ethylene propylene… (More on Teflon)