Rising posture: Brake hose | Application of aromatic nylon fiber in automobile hose

Way Liu
3 Companies Founder: 11 Years Hydraulic Hose Assembly & International Trade Operate(B2B) & . Also an Honest Partner For Your China Sourcing.
There are a wide range of hose types, which can be classified according to the type of covering glue, reinforced layer material and processing technology. Among them, the largest production is the car hose, accounting for 50% of the total.
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car hose application

Reading Guide:

  • Cooling system hose
  • Air conditioning system hose
  • Turbocharged hose
  • Brake hose
  • Fuel hose
  • Power steering hose

The brake hose or say automobile rubber hose is generally a multi-layer structure, and there are reinforcing materials between the inner rubber layer and the outer rubber layer, such as steel wire, polyester fiber, aramid fiber, nylon 66 fiber, and so on. In industrial production, the reinforced fiber is usually wound on the blank of the inner hose by knitting, knitting, or winding, and then covered with the outer hose.

the brake hose classification as follow

Cooling system hose

Cooling system hose.

The hose of the automobile cooling system connects the engine and the radiator and transfers heat through the coolant. It can be subdivided into a radiator hose (resistant to high temperature) and a heater hose (resistant to high temperature and pulse vibration). The working water temperature is usually 125 ℃.

The reinforced layer materials of the cooling system hose are mainly para-aramid fiber and polyester fiber. Usually para-aramid fiber, SHOTON can provide good heat resistance and can work at 160C for a long time. In addition, the SHOTON series of aramid can withstand higher temperatures, and the long-term service temperature can reach 190C.

Air conditioning system hose.

The earliest refrigerant in automobile air conditioning systems is freon. Because freon will destroy the ozone layer, it is completely banned in our country after 2000, and the refrigerant used at present is R134a.

The rubber hose of its air conditioning system usually uses nylon as the barrier layer material, EPDM rubber for the outer rubber layer, polyester fiber, or polyvinyl acetal (vinylon) fiber for the middle reinforcement layer, and aramid fiber for a small amount. Polyester fiber is the most widely used in China.

The next generation of automotive air-conditioning systems will use carbon dioxide as a refrigerant. Carbon dioxide is an excellent refrigerant for environmental protection, but it needs to be used under supercritical conditions as a refrigerant in an air conditioning system, which puts forward higher requirements for temperature resistance, pressure resistance, and permeability resistance of rubber hose. It is a good choice to use para-aramid fiber as reinforcement material. At present, rubber hose manufacturers at home and abroad have studied this technology.

Turbocharged hose.

Usually, the turbocharged hose can be divided into high-temperature hose and low-temperature hose after passing through the intercooler. Among them, the service temperature of the rubber hose in the high-temperature section is higher, usually up to 210 ℃, and the common reinforced layer materials (such as polyester fiber and nylon fiber) can not bear such high temperature at all.

SHOTON series aramid yarns can withstand high temperatures for a long time and are widely used in turbocharged hoses.

Turbocharged hose application

Brake hose.

A brake hose is an important safety component of vehicles, which requires very high quality and stability of products.

The rubber inside and outside the brake hose is usually made of EPDM rubber, and the reinforced layer is made of vinylon fiber or aramid fiber.

Brake hose has extremely strict requirements for expansion deformation under high pressure, and the high strength and high modulus of aramid fiber can fully meet the requirements of low deformation.

brake hoses

Brake hose assembly

Fuel hose.

Automobile fuel hose, including fuel conveying hose and fuel supply hose to the engine, is an important safety component, and there are many requirements for the performance of materials.

The traditional fuel hose uses the structure of the inner glue layer-reinforcement layer-outer glue layer, and the fiber reinforcement layer is added between the glue layer and the glue layer by winding or weaving process.

The maximum service temperature of the fuel hose can reach 130 ℃.

Therefore, many fuel hoses use aramid fiber-reinforced layers with good high-temperature resistance and low elongation.

Air conditioning system hose

Power steering hose.

The automobile power steering hose is divided into hydraulic steering system hose and electronic steering system hose. The contact medium of traditional hydraulic steering hoses is mineral oil, which requires good high-temperature resistance and no leakage, and the highest service temperature can reach 150 ℃.

The reinforced layer material of the hydraulic steering hose can be made of nylon 66 fiber and aramid fiber. More and more electronic steering systems are used in the new automobile power steering system. The system does not require the use of high-pressure pumps and steering media, nor does it require hose connections.

Power steering hose

Power steering hose

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