Fluorine rubber oil seal
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Fluororubber refers to a synthetic polymer elastomer containing fluorine atoms on carbon atoms in the main chain or side chains. The introduction of fluorine atoms gives rubber excellent heat resistance, oxidation resistance, oil resistance, corrosion resistance and atmospheric aging resistance. It has been widely used in aerospace, aviation, automobiles, petroleum and household appliances. It is a key material that cannot be replaced in the cutting-edge industry of national defense. Since 1943, has developed polyolefin fluororubber, nitroso fluororubber, tetrapropyl fluororubber, phosphazene fluororubber and perfluoroether rubber and other varieties.
Fluorine rubber seals, when used for engine sealing, can work for a long time at 200 ℃ ~ 250 ℃ and work for a short time at 300 ℃. Its working life can be the same as that of engine repair, reaching 1000~5000 flight hours (time 5~10 years); When used in chemical industry, it can seal inorganic acids (such as 67% sulfuric acid at 140 ℃ and concentrated hydrochloric acid at 70 ℃, 30% nitric acid), organic solvents (such as chlorinated hydrocarbons, benzene, high aromatic gasoline) and other organic substances (such as butadiene, styrene, propylene, phenol, fatty acids at 275 ℃, etc.); When used in deep well oil production, it can withstand harsh working conditions of 149 ℃ and 420 atmospheres. When used for superheated steam seals, it can work for a long time in a steam medium of 160~170 ℃. In the production of monocrystalline silicon, fluorine rubber seals are commonly used to seal special media under high temperature (300 ℃)-trichlorosilane, silicon tetrachloride, gallium arsenide, phosphorus trichloride, trichloroethylene and hydrochloric acid at 120 ℃.
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