Polytetrafluoroethylene (PTFE)

Polytetrafluoroethylene (PTFE) is a synthetic thermoplastic produced by the polymerization of tetrafluoroethylene, it is a high-molecular-weight compounAd consisting of carbon and fluorine polymer. The material has a low friction surface, high melting point, and resistance to attack by almost all commonly used chemicals. But It will weaken by high temperature alkali metals and fluorine. While PTFE is nontoxic, but it will begins to deteriorate at temperature of 260 °C, and will begin to decomposes at 350°C. These degradation may release lethal substance that cause flu-like symptoms in human