The materials used in high-pressure hoses are divided into non-metallic materials and metal materials. The non-metallic materials often used in the production process of high-pressure hoses include nitrile rubber, styrene-butadiene rubber, neoprene rubber, etc. With the advancement of technology and the development of the rubber industry . EPDM rubber, chlorosulfonated polyethylene, chloroether rubber, hydrogenated nitrile rubber, etc. are gradually applied to the products of high-pressure hose manufacturers. It is used to manufacture high-performance, high-value-added high-pressure hose products. Non-metallic reinforcing materials include nylon and polyester fibers. With the development of the textile industry, high-performance materials such as aramid fibers are gradually used in high-pressure hoses. Metal materials include copper-plated steel wire with circular cross-section and galvanized steel wire as skeleton layer material. With the advancement of computer simulation, testing and other technologies, flat steel wire (copper-plated steel wire with oval cross-section) will be used in high-pressure hoses. . New materials used in high pressure hoses:
(1) EPDM rubber Eli: has excellent heat resistance, steam resistance, weathering resistance, chemical corrosion and excellent electrical insulation properties, especially good resistance to glycol ether brake fluid and vegetable oil . It is suitable for the manufacture of high-pressure hoses that are resistant to heat, steam and strong corrosive media. (2) Chlorosulfonated polyethylene rubber: It has excellent resistance to ozone and weathering. Good chemical resistance, excellent flame resistance, oil resistance and tear resistance. It is suitable for the manufacture of high-pressure hoses that are resistant to strong corrosive media, flame resistance, and ozone aging resistance, and is especially suitable for the manufacture of rubber hose outer layers used in harsh atmospheric environments. (3) Chloroether rubber: has excellent weathering resistance. Good oil and solvent resistance. Good flame resistance and low air permeability, suitable for the manufacture of oil-resistant, ozone-resistant, weather-resistant and low-air permeability high-pressure hoses. (4) Hydrogenated nitrile rubber: It has excellent oil resistance, corrosion resistance, high and low temperature resistance, oxidation resistance, dynamic fatigue resistance, and ozone resistance. It is suitable for the manufacture of high-pressure hoses with special requirements such as oil resistance. (5) Nitrile rubber/PVC: excellent oil resistance, wear resistance and ozone resistance. Good extrusion performance, easy to process, suitable for manufacturing high-pressure hose cover used in wear-resistant and ozone-resistant environments. (6) Aramid fiber: Aramid fiber has excellent properties such as ultra-high strength, high modulus, high temperature resistance, acid and alkali resistance, and light weight, and its strength is 7 times that of steel wire. The modulus is 2-3 times that of steel wire or glass fiber. The toughness is twice that of steel wire, and the quality is only about 1/5 of that of steel wire. It does not decompose or melt at a temperature of 450 °C, and has good insulation and anti-aging properties. very long life cycle. (7) Flat steel wire: It has high strength, high modulus, high temperature resistance and flexibility, and good pressure bearing performance. In particular, it has good resistance to torsion and bending deformation. High-pressure wire braided/wrap hoses made with flat steel wire have much better impulse performance than hoses made with high-strength (ultra-high-strength) steel wire.
