Teflon insulated wire is also known as high temperature cable. In general, high temp Teflon wires are made up of Teflon conductor and Teflon insulation. The degree of high temperature resistance of Teflon insulated wire is related to the outsourcing of Teflon wire insulation materials. Teflon shielded wire insulation materials have the following three types. They are FEP (fluorinated ethylene propylene) insulation, PFA (perfluoroalkylate) insulation and PTFE (polytetrafluoroethylene) insulation.