Hose types for automobiles
                          
                                                       17thNov, 2015·By Tina Zhai

                                           

Air Conditioning Hose

                       


The rapid development of the automotive industry to the automotive accessory products - Hose bring development opportunities, if calculated according to each car using 20m hose, 2005 only new automobile production demand for hose m in 100 million or more, plus maintenance Hose, the market potential is huge. As the car to the high-speed, high functionality and comfort, such as the direction of development, as well as combustion of fuel use electrical equipment or parts of the EFI device is fully used, the turbo; in addition, to protect the environment, car use unleaded gasoline, air conditioning with R134a refrigerant to replace R12, automotive engine compartment narrowing, such as elevated temperature gave the car with a hose put forward higher requirements, fuel resistant, high temperature, low permeability of refrigerant, and long lifetime become the mainstream automotive hoses. From inside the hose layer structure, oil, heat and low permeability of refrigerant hoses are increasingly using a resin and a layer of rubber or a resin and two layers of rubber and rubber layers of different materials, This structure has been in the form of fuel hoses, air conditioning hoses, turbocharger hose been verified. In addition, high-performance rubber are increasingly being used, such as fluorine rubber, butyl rubber, silicone rubber, epichlorohydrin rubber, hydrogenated nitrile rubber, chlorosulfonated polyethylene rubber, acrylic rubber, EPDM Wait.

 1. A fuel hose with the use of unleaded petrol in the car EFI devices, structure and materials of the fuel hose has undergone great changes, the development of the inner layer with a fluorine rubber, epichlorohydrin rubber, nitrile or acrylate rubber substitute rubber. To reduce fuel permeability and further improve heat resistance, mostly inner layer of composite structure in which a fluorine rubber and epichlorohydrin rubber or acrylate rubber composition by extrusion molding. Since the fluorine rubber is expensive, so the fluorine rubber layer is relatively thin (0.2-0.7mm). Reinforcing layer is made of fiberglass, polyester fiber or nylon fiber braided or twisted together. The outer layer using epichlorohydrin rubber, acrylic rubber or chlorosulfonated polyethylene rubber neoprene substituted

  2 .air conditioning hoses Air conditioning hoses are also rapidly developing automotive hose products, currently has full rubber, rubber - resin composites, full resin air conditioning hose. Because of the large new air conditioning refrigerant R134a applications, air conditioning hose structure and material changes. From other international and national standards, their structure has rubber / fabric / rubber, rubber / steel / rubber, (thermoplastics) TP / fabric / rubber, rubber -TP- rubber / fabric / rubber, TP- rubber / fabric / rubber, TP- rubber -TP- rubber / fabric / rubber. Currently the most used rubber - resin composite structure, namely the inner layer by a layer of resin and a layer of rubber, this structure is considered to be adapted to new automotive air conditioning refrigerant R134a best choice.


    3. radiator hose. Vehicle development to energy efficiency and low pollution of direction so that the radiator hose working environment has undergone great changes, such as the engine compartment of the temperature rise from the original 110-125 ℃ to 125-150 ℃, even up 175 ℃, the original sulfur cure systems usually radiator hose production is gradually being replaced by peroxide systems produced radiator hose. Shanghai Shang Xiang Automobile Hose Co., Ltd. uses high-grade EPDM radiator hose as a host material and choose special synthetic fiber knitted fabric reinforced structure, the country's first cold feed extrusion technology and non-core preform cover die naked vulcanization new technology, succeeded in producing breaking strength, ozone resistance, adhesion strength and other technical indicators have reached the international standard automotive radiator hose. Wherein the pulse performance by Volkswagen AG found more than 300,000 times, far more than the international standards prescribed ≥15 million times. At present, this radiator hose has been recognized by Shanghai Volkswagen, FAW-Volkswagen and other companies.

    4. brake hose brake hose on the car is very strict quality requirements, related to the vehicles and personal safety of the important parts. In addition to resistance to brake fluid brake hoses, but also must have good aging resistance and moisture permeability properties. Previously, car brake hose layer materials used mainly in styrene-butadiene rubber. Recently, due to the maintenance-free car appeared, enhance and high boiling brake fluid using brake fluid temperature of the working environment, EPDM or EPDM / butyl rubber, styrene-butadiene rubber substituted trend. The inner layer and the outer layer mostly Brake Hose EPDM material, the layer between two layers of woven reinforcing layer of natural rubber, reinforced layer polyester, polyvinyl alcohol or rayon fibers, within layer can use more pressure nylon outer layer can also be used chlorosulfonated polyethylene rubber. The rapid development of the brake hose. Only brake hose plant in Nanjing 7425 annual production capacity has reached 8 million / a, and has become the Jetta, Red Flag, Beverly, Alto, Iveco cars, light trucks exclusive accessory products, accounting for 50% of the domestic market of the brake hose the above.

  5. power steering hose power steering hose contact medium is mineral oil, requiring heat performance, strong joints. Foreign automotive power steering system latest trends is the use of high-pressure pump, and the pump's miniaturization and higher power of the required hose improved heat resistance and durability, the inner layer with good oil resistance, the outer layer wear resistance heat (150 ℃ above), weatherability. This hose inside and outside the conventional layer material nitrile rubber and neoprene, now hydrogenated nitrile rubber, chlorosulfonated polyethylene rubber, chlorinated polyethylene, acrylic rubber direction. Hydraulic steering hose new structure is hydrogenated nitrile rubber as the inside layer, nylon 66 as reinforcing layer, chlorosulfonated polyethylene rubber as an outer layer. Compared with conventional hose, this hose life at 140 ℃ conditions can be increased by more than 2 times. To improve the heat resistance, power steering hose also has fluorine rubber, but easy to play due to the fluorine rubber and oil additives in certain reaction, and thus the application subject to certain restrictions.

  6. turbocharger hose abroad, the current turbocharger hose structure all-rubber, fluorine rubber inner layer and the silicone rubber composition of good heat resistance, high strength reinforcing layer made of aramid fiber knit, the outer rubber layer is made of silicone rubber.

We should be in terms of product structure, production processes, new materials and other aspects, with the help of foreign advanced technology and equipment, to develop new products, improve the quality of automotive hoses.