Material characteristics: 1, white, odorless, tasteless, non-toxic powder, commonly known as "plastic king". 2, the active hydrogen atoms on the ethylene monomer are replaced by inert fluorine atoms, and the polytetrafluoroethylene monomer is polymerized. 3, temperature resistance, the operating temperature of -100â??-250â??. 4, high strength weather resistance, radiation resistance and low permeability. 5, non-adhesion, is the smallest surface tension in solid materials, does not adhere to any substance. 6, non-toxic, with physiological inertia, as artificial blood vessels and organs long-term implantation in the body without adverse reactions.