What materials are needed to produce power steering hose？

Power steering hose contact medium is mineral oil, requires good heat resistance, solid joint parts. The recent development trend of foreign automobile power steering system is the use of high-pressure pumps, as well as to achieve the miniaturisation of pumps and high output, the hose is required to improve heat resistance and durability, the inner rubber layer has good oil resistance, the outer layer of wear-resistant, heat-resistant (more than 150 ℃), weather-resistant. The inner and outer rubber layer materials of this hose used to be nitrile rubber and chloroprene rubber, now to hydrogenated nitrile rubber, chlorosulphonated polyethylene rubber, chlorinated polyethylene, acrylate rubber direction. The new structure of hydraulic steering hose is to use hydrogenated nitrile rubber as the inner rubber layer, nylon 66 as the reinforcing layer, and chlorinated polyethylene rubber as the outer rubber layer. Compared with the traditional hose, the service life of this hose can be increased by more than two times at 140℃. In order to improve the heat resistance, power steering hose also use fluorine rubber, but due to the fluorine rubber is easy to react with some additives in the oil, so the application is subject to certain restrictions.