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polytetrafluoroetylene is shot for PTFE, F4. It is a tetrafluoroethylene polymerization of the polymer, its structure is simplified as - [-of CF2-of CF2-] n-, has excellent chemical stability, corrosion resistance (corrosion resistance in the world today can be the mostone of the best materials, with the exception of molten sodium metal and liquid fluorine, the ability of all other chemicals, king of boiling water is not from the change, widely used in a variety of anti-acid and organic solvents), tightness, high lubricationviscosity, electrical insulating properties and good aging endurance, temperature is excellent (long-term work in the temperature of +250 °C to -180 °C). PTFE itself not toxic, but one of the raw materials used in the production process PFOA (PFOA) have been regarded as a carcinogenic effect.
Temperature -20 ~ 250 °C (-4 ~ +482 ° F), allow the cold and hot temperatures, or alternating hot and cold operation.
Pressure of -0.1 ~ 6.4Mpa (Total Negative, to 64kgf/cm2) (Full vacuuming to 64kgf/cm2)
Use the advantages of
High temperature - the use working temperature of 250 °C.
The low temperature resistance - has a good mechanical toughness; even at temperatures down to -196 °C, but also to maintain a 5% elongation.
Corrosion resistance - demonstrated inert to most chemicals and solvents, the capability of acid and alkali, water and various organic solvents.
Weather resistance - the best aging life in plastic.
High lubrication - is the lowest friction coefficient in the solid material.
Not adhere to - is the minimum surface tension of solid materials, will not adhere to any substance.
Poisoned - physiologically inert, long-term implanted as artificial blood vessels and organs no adverse reactions.
Chemical properties
Resistance to atmospheric aging: radiation resistance properties and lower permeability: Long-term exposure to the atmosphere, surface and performance remained unchanged.
Non-flammable: the limiting oxygen index of 90 or less.
Acid and alkali resistance: do not dissolve in acids, alkalis and organic solvents (including magic acid, fluorine antimony sulfonic acid).
Resistance to oxidation: corrosion capability of strong oxidants.
PH: neutral.
PTFE application
PTFE can be compression or extrusion molding process; also be made of the aqueous dispersion for coating, impregnation or made fibers. PTFE is widely used in atomic energy, defense, aerospace, electronics, electrical, chemical, machinery, equipment, instrumentation, construction, textile, metal finishing, pharmaceutical, medical, textile, food, metallurgical smelting and other industrial high and low temperature corrosion-resistant materials, insulation materials, anti-sticking coating, making the products can not be replaced. PTFE has an outstanding fine performance, high temperature resistance, corrosion resistance, non-stick, self lubricating, excellent dielectric properties, low coefficient of friction. Used as engineering plastics can be made of Teflon tubing, rods, belts, plates, film and other. Generally used in high performance requirements of corrosion-resistant pipes, containers, pumps, valves and system radar, high frequency communications equipment, radio equipment and so on. To join in the PTFE can withstand the filler of PTFE sintering temperature, its mechanical properties available to greatly improve. While maintaining the excellent performance of the PTFE. Filled varieties of glass fiber, metal, metal oxide, graphite, disulfide, molybdenum, carbon slender, polyimide, EKONOL ... and so on, wear resistance, the PV limit value can be increased by 1000 times.Teflon tubing selection of suspension polymerization teflon resin made by ram extruding method. Known plastics PTFE has the best chemical resistance and dielectric properties. PTFE braided packing is a good dynamic sealing material. It is woven with expanded poly vinyl chloride. PTFE braided packing is a good dynamic sealing material. It is woven with expanded poly vinyl chloride. It has a low coefficient of friction, wear, chemical corrosion, sealing good, not hydrolysis, do not harden excellent performance. Used to work in various media, gasket seals and lubrication materials, and electrical insulation used in a variety of frequencies. Capacitor dielectric, said wire insulation, electrical appliance. PTFE film for the capacitor dielectric, and a special cable insulation, wire insulation, electrical appliance and gasket can be done non-stick with sealing tape, mold release.
PTFE molding powder