Tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer is a resin modified by perfluoroalkyl vinyl ether modified polytetrafluoroethylene, referred to as PFA. It improves the difficulty of processing polytetrafluoroethylene PTFE and makes its performance and long-term use temperature basically close to or maintain the level of polytetrafluoroethylene. The mechanical strength of PFA is similar to that of polyvinyl fluoride, but at a high temperature of 250C, its mechanical strength is higher than that of polytetrafluoroethylene and it is tough and soft. The electrical performance of PFA is no different from that of polytetrafluoroethylene, it is less affected by external frequency, and has excellent dielectric properties. Therefore, it is a good choice to use PFA as a coaxial cable core. PFA Teflon wire also has the same thermal stability as polytetrafluoroethylene, with a long-term use temperature of -250~260°C and a thermal decomposition temperature above 450°C. Even in a working environment of 285°C, it can still maintain more than 2000 hours stably and still maintain its original mechanical properties. It shows its excellent thermal stability performance. The chemical performance is stable and the chemical stability of polytetrafluoroethylene and polyperfluoroethylene wires is the same. At the same time, it also has significant properties such as non-stickiness, non-combustibility, low friction and resistance to environmental stress cracking. It is mainly easy to process and can melt and flow above the melting point. The wire can be extruded and formed. Due to the superior thermoplasticity and easy processing of PFA, small-sized thin-walled insulated wires can be made.
