Polytetrafluoroethene is commonly referred to as "non-stick coating" or "easy to clean cauldron material"; It is a synthetic polymer material that uses fluorine to replace all the hydrogen atoms in polyethylene. This material has the characteristics of acid and alkali resistance, resistance to various organic solvents, and almost insoluble in all solvents. At the same time, PTFE has the characteristics of high temperature resistance, its coefficient of friction is very low, so it can be used as lubrication, but also become an ideal coating for easy to clean wok and water pipe lining.