Low-permeability fluororubber product material

Abstract

The invention discloses a low-permeability fluororubber product material which comprises the following raw materials in parts by weight: fluororubber, calcium silicate, magnesium oxide, calcium hydroxide, WS280, iron oxide red, modified molybdenum disulfide, nano inorganic filler, modified diatomite and modified white carbon black. Preparation of synthetic rubber comprises steps of feeding all the raw materials into an internal mixer according to the weight parts, detecting the hardness, strength and elongation of the synthetic rubber after the synthetic rubber is obtained through the internal mixer, and filtering after detection, carrying out open milling molding on the qualified synthetic rubber through an open mill at 60-70 DEG C, putting the molded rubber into a mold in vulcanization equipment, and carrying out vulcanization treatment on the rubber. The low-permeability fluororubber product material which is excellent in flowability, improved in demolding performance, relatively good in methanol and ethanol fuel oil resistance and good in compression stress relaxation is prepared through the procedures of preparation of synthetic rubber, molding and vulcanization of the rubber, secondary vulcanization aftertreatment and the like.

Description

technical field

[0001] The invention belongs to the technical field of fluororubber and relates to a fluororubber product material, in particular to a low-permeability fluororubber product material. Background technique

[0002] Viton is a rubber known for its resistance to alcohol-based fuel oil. With the needs of social development, the "National VI" standard will strictly control the emission limits of pollutants. The two-day emission limit requirement for evaporative emissions has been reduced from 2 grams in the original "National V" to 0.65 grams. To below 40g*mm / m2*day. Domestic ternary fluorine rubber with high fluorine content cannot meet the requirements; domestic fluorine rubber with high fluorine content has poor processability and low product qualification rate; imported ternary fluorine rubber can meet the requirements of fuel permeability, but the material The cost is twice as high as that of domestic products. The invention proposes to obtain a low-permeab...

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