①.PTFE(Poly tetra-fluoro ethylene)- is a fully fluorinated polymer available in various unmodified grades. Methods of forming products include paste extrusion, ram extrusion, molding and calendaring between rolls. Many formed PTFE products are consolidated by sintering in an oven or used in unsintered form(eg:thread sealant tape).Paste extrusion and calendaring methods are used with fine powder PTFE resins while granular PTFE resins are processed by ram extrusion and moulding.

Ulike PTFE, all of the following polymers are melt processable.

②.FEP(fluorinated ethylene propylene)- is a fully fluorinated copolymer. It is available as pellets or as stabilized aqueous dispersions.Applications for this family of resins include coating, melt extrusion, and impregnating. FEP resins are processed by conventional melt-extrusion techniques and by injection, compression, transfer, and blow-molding processes.

③ PVDF-Poly vinyledene fluorine，partially fluorinated polymer containing carbon to carbon double bond（Which is weaker than single bonds of fully fluorinated polymers）