It is composed of expanded poly four vinyl tape woven. PTFE braided packing is a kind of dynamic sealing material good. It is composed of expanded poly four vinyl tape woven. It has a low coefficient of friction, wear resistance, chemical corrosion resistance, good sealing performance, no hydrolysis, Teflon Cloth not hardened and other excellent performance. Liner for various medium sealing and lubricating materials, as well as in various frequency of use of electrical insulation. The capacitor dielectric, line insulation, electrical instrumentation insulation etc.. The teflon film for capacitor dielectric, special cable insulation layer, wire insulation, electrical instrumentation insulation and sealing gasket, also do not tape, sealing
Belt, demoulding.

PTFE material used Teflon PTFE ethylene tube can be used to compress or extrusion molding; also can be made into a water dispersion, used for coating, dipping or fibres. Widely used as Teflon in the atomic energy, defense, aerospace, electronics, electrical, chemical industry, machinery, instrument, meter, construction, textile, metal surface treatment, pharmaceutical, medical, textile, food, metallurgical and other industries in the high and low temperature resistance, corrosion resistant materials, insulation materials, anti sticking coating, make it become the products can not be replaced. PTFE has excellent comprehensive properties, good resistance to high temperature, corrosion resistance, non stick, self lubrication, the friction coefficient of the dielectric properties, excellent low. As engineering plastics, can be made of Teflon tube, rod, strip, plate, film etc.. Generally used in high performance PTFE Adhesive Tape corrosion of pipes, containers, pumps, valves and radar, high frequency communication equipment, radio equipment. Add any can withstand the sintering temperature of PTFE filler in PTFE, its mechanical properties can be greatly improved. At the same time, keep the PTFE Coated Fabric PTFE other excellent performance. Varieties of filled with glass fiber, metal, metal oxide, graphite, MoS2, carbon Qianxian, polyimide, such as EKONOL need, abrasion resistance, the limit PV value can increase 1000 times. PTFE tubing using suspension polymerization of PTFE resin is manufactured by ram extruding method. In the known plastic PTFE has the best corrosion resistance and dielectric properties. PTFE braided packing is a kind of dynamic sealing material good.

Sulfuric acid, nitric acid, hydrochloric acid, even in aqua regia and boil, without changing its weight and performance, almost insoluble in all solvents, only in 300 ℃ above slightly soluble in total alkane (0.1g / 100g). PTFE does not absorb moisture, non flammable, are very stable to oxygen, ultraviolet, so excellent weather resistance. The electrical properties of PTFE in a wide frequency range the dielectric constant and dielectric loss are very low, and the volume resistivity and breakdown voltage, arc resistance are higher. The radiation resistance of PTFE radiation resistant performance is poor (Ladd, 104) by high-energy radiation induced degradation, electric performance and mechanical properties of polymer decreased significantly. PTFE polymerization of tetrafluoroethylene polymerization by free radicals generated by. Polymerization industry is in the presence of water stirring, to disperse the heat of reaction, and easy to control the temperature. Polymerization is in commonly 40 ～ 80 ℃, 3 ~ 26 kgf / cm 2 under pressure, through organic peroxides, inorganic sulfate can be used as initiator, can also be caused by oxidation and reduction system. Per mole of tetrafluoroethylene polymerization exotherm 171.38kJ. Dispersion polymerization to add surface active perfluorinated agent, e.g. perfluorooctanoic acid or its salts. Coefficient of thermal expansion (25 ~ 250 ℃) 10 ~ 12 × 10-5/ ℃.