Polytetrafluoroethylene PTFE (F4) is a white, odourless, tasteless and nontoxic polymer, with excellent resistance to atmospheric aging and incombustibility, if it is exposed in the atmosphere, the property can be constant. With fine chemical stability, it can proof against all strong acid, strong alkali, strong oxidant and organic solvents, except the elemental fluorine and sodium metal in molten state which have some certain corrosiveness to its product.

Its main property is as below: