Application of high temperature resistant silicone materials in the automotive industry

As a kind of special material widely used in industries such as industry, electronics and daily necessities, high temperature resistant silicone material is welcomed by customers in the market and refined with high temperature resistant additives.

High temperature resistant silicone material is one of the most important materials in automobile manufacturing. It not only optimizes the automobile manufacturing process, but also improves the performance and safety of the automobile. It has been widely used in various parts of automobiles, such as airbag coating. Layers, power transmission seals, gaskets, hoses, windshield linings, automotive engine seals, ignition wires and coil jackets, automotive turbocharger cooling tubes, sealing and protection of automotive components, high voltage cables and wire harness seals Wait.

Hybrid and pure electric vehicles Compared with traditional fuel vehicles, many high-voltage accessories, such as power batteries, high-voltage power distribution boxes, drive motors, motor controllers, etc., are added, which puts new demands on automotive cables. Because these cables are arranged in the engine area of the front compartment and the chassis area, the temperature is high and the space is small, and the cable needs to be soft, the turning radius is small, and the high and low temperature resistance is good; secondly, the road working condition is complicated, the cable wear resistance must be good and the mechanical strength is high; In addition, the vehicle speed is high and low, especially in severe working conditions such as full load climbing, and the instantaneous high current requires the cable to have short-term overload capability.

Automotive Wire Silicone Seal

In summary, the new energy vehicle custom rubber components such as cable must have: good electrical insulation properties; thermal stability, weather resistance; corrosion resistance, oil and water resistance, excellent flame retardant performance; comprehensive mechanical properties, high flexibility and high tear resistance Split and so on.

At present, automotive power cable insulation materials are crosslinked polyolefins and thermoplastic elastomers. Among them, the crosslinked polyolefin material can be heat resistant up to 150 ° C, but the material of the material is relatively hard, inconvenient to install in a small body space, and requires radiation crosslinking, the process is complicated, and is not suitable for large section cables. The thermoplastic elastomer material does not have a heat resistance of more than 125 ° C, and is used for a low temperature class of the power cable, and the cable of the thermoplastic elastomer material has a risk of cracking for a long time.

The high temperature resistant silicone rubber single wire sealhas high temperature resistance, ozone resistance, weather resistance and excellent electrical insulation; the silicone rubber wire has a large current carrying capacity, saves the conductor cross section, and can cope with the long-time full load operation requirement; the flame retardant can be achieved by adding a flame retardant. Highly flexible, easy to install in a limited space; high tear-resistant silicone rubber, trouser tearing up to 25N/mm. Therefore, silicone rubber materials can make up for their shortcomings while comprehensively crosslinking the advantages of polyolefin and thermoplastic elastomer materials, and silicone rubber can reduce vehicle weight and carbon dioxide emissions, and is a good choice for automotive power cables.