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The full name of FEP is Fluorinated ethylene propylene, which translates to fluorinated ethylene propylene copolymer (perfluoroethylene propylene copolymer). The English trade name: Teflon * FEP, is a type of chemical substance. FEP is a copolymer of tetrafluoroethylene and hexafluoropropylene. FEP crystals have a melting point of 304 ° C and a density of 2.15 g / CC (g / cm3).

FEP can be applied to soft plastics, which have lower tensile strength, abrasion resistance and creep resistance than many engineering plastics. It is chemically inert and has a low dielectric constant (2.1) over a wide temperature and frequency range.

Polyperfluoroethylene propylene resin has similar characteristics to polytetrafluoroethylene and good processing technology of thermoplastics, which makes it an important material to replace polytetrafluoroethylene. F-46 is widely used in the production of wire and cable for electronic equipment transmission lines used at high temperatures and high frequencies, internal computer connection cables, aerospace wires, and other special purpose installation lines, oil mine logging cables, and submersible motor winding wires. , Micro-motor leads and so on.