Waterproof and breathable membrane (Abbreviated as Teflon or [PTFE,F4]), is known as "Plastic King", Chinese trade names "Teflon", "Teflon", "Teflon", "Teflon", "Teflon", "Teflon", "Teflon", "Teflon", "Teflon" and so on. It is made of tetrafluoroethylene polymerization of polymer compounds, with excellent chemical stability, corrosion resistance (is one of the best corrosion resistance materials in the world today, in addition to molten metal sodium and liquid fluorine, the ability of all other chemicals, boiling in aqua aqua can not change, Widely used in all kinds of acid and alkali resistance and organic solvent), sealing, high lubrication, non-viscosity, electrical insulation and good anti-aging endurance, excellent temperature resistance (can work in +250℃ to -180℃ temperature for a long time). The membrane itself is not toxic to humans, but perfluorooctanoic acid (PFOA), one of the raw materials used in the manufacturing process, is thought to be possibly carcinogenic. Temperature -20~250℃(-4~+482°F), allowing sudden cooling and sudden heating, or alternating hot and cold operation. Pressure -0.1~ 6.4mpa (Full negative pressure to 64kGF /cm2)(Full vacuum to 64kGF /cm2) its generation solves many problems in China's chemical, petroleum, pharmaceutical and other fields. Ptfe seals, gaskets, gaskets. Ptfe seals, gaskets, sealing gaskets are made of suspended polymer waterproof breathable film resin. Compared with other plastics, ptfe has the characteristics of chemical corrosion resistance and it has been widely used as sealing material and filling material. Used as engineering plastics, can be made into polytetrafluoroethylene tube, rod, tape, plate, film, etc. It is generally used in corrosion-resistant pipelines, containers, pumps, valves, radar, hf communication equipment, radio equipment and so on, which require high performance. Dispersion liquid can be used as insulating impregnation liquid of various materials and anti-corrosion layer of metal, glass and pottery surface. All kinds of ptfe ring, PTFE gasket, ptfe disc are widely used in all kinds of anti-corrosion pipe flange sealing. In addition, can also be used for silk, polytetrafluoroethylene fiber - flon (foreign commodity name teflon). All kinds of PTFE products have played an important role in the fields of national economy such as chemical industry, machinery, electronics, electrical appliances, military industry, aerospace, environmental protection and Bridges. Waterproof breathable membrane (PTFE) conditions of use in chemical industry, petrochemical, refining, alkali, acid, phosphate fertilizer, pharmaceutical, pesticide, chemical fiber, dye, coking, coal gas, organic synthesis, non-ferrous smelting, steel, atomic energy and high purity products (e.g., ionic membrane electrolysis), viscous material transportation and operation, highly strict health food, beverages and other production departments.