Poly tetra fluoroethylene (PTFE), commonly known as the "king of plastics", is a polymer prepared with tetrafluoroethylene as monomer. White waxy, translucent, excellent heat and cold resistance, can be used at -180 ~ 260ºC for a long time. This material has the characteristics of acid and alkali resistance, resistance to various organic solvents, almost insoluble in all solvents. At the same time, polytetrafluoroethylene has the characteristics of high temperature resistance, its friction coefficient is very low, so it can be used for lubrication, but also become the ideal coating for easy to clean the inner layer of water pipe; Toxic, human carcinogen.