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Overview of fluororubber applications in the automotive industry

by:ORK      2022-10-15
Fluorine rubber refers to a synthetic polymer elastomer with fluorine atoms attached to the carbon atoms of the main chain or side chains. The new polymer material has the characteristics of heat resistance, oil resistance, solvent resistance, strong oxidant resistance, and good physical and mechanical properties. It has become an indispensable and alternative basic material in modern industry, especially in high-tech fields, and is widely used in national defense, military industry, aviation. Aerospace, automotive, petrochemical and many other fields. At present, more than 60% of the world's fluorine rubber production is used in the automobile industry. Due to the excellent performance of fluororubber, the application fields are constantly expanding, and there are more and more types of products. The main products are various sealing materials, hoses, tapes, tapes, insulating materials, etc. It is mainly used in the automotive and aerospace fields in China. At present, the main products of fluororubber materials for domestic auto parts include engine crankshaft front oil seal, crankshaft rear oil seal, valve stem oil seal, engine diaphragm, engine cylinder liner water blocking ring, refueling Hose, fuel hose, oil filter check valve, oil filler cap O-ring, gearbox and reducer oil seal, etc. Fluorine rubber, silicone rubber, acrylate rubber and heat-resistant elastomer have become the development trend and mainstream of rubber materials for automobiles, and most products use fluorine rubber with better performance to replace traditional materials. With the use of unleaded gasoline and electronic injection devices in automobiles. The structure and material of the fuel hose have changed greatly. The inner rubber layer has been developed to replace the nitrile rubber with fluorine rubber. In order to reduce the fuel permeability and further improve the heat resistance, the inner rubber layer adopts a composite structure. That is, it is composed of fluorine rubber and chlorohydrin rubber or acrylate rubber. Because fluorine rubber is expensive. Therefore, the fluororubber layer is relatively thin, and the fuel hose of this structure has become the mainstream product abroad. Our country has also developed this kind of fluororubber as the inner layer of the hose, which is used in Santana, Audi, Jetta, Fukang and other automobiles. In terms of high-tech automobile engine, transmission, and valve oil seals, the selected materials are mainly fluorine rubber, hydrogenated nitrile rubber, etc.; the fluorine rubber and silicone rubber composite oil seals have become the most commonly used engine crankshaft oil seals. The hydraulic system of the large-scale loading and unloading truck has a long continuous working time, and the oil temperature and the temperature of the parts rise rapidly, and ordinary rubber cannot meet the requirements. And fluorine rubber products can meet various requirements. In addition, fluororubber seals are used in drilling machinery, oil refining equipment, and natural gas desulfurization devices, and can be used in harsh conditions such as high temperature, high pressure, oil and strong corrosive media; in chemical industry, fluororubber seals are used in pumps , pipe joints, equipment containers, used to seal inorganic acids, organics and other chemical substances. As a plastic extrusion additive. When polyethylene and polypropylene are extruded, the low-viscosity fluororubber can form a film on the surface of the extrudate, thereby increasing the extrusion rate and making the product obtain the desired appearance.
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