High temperature resistant silicone material is one of the indispensable and important materials in automobile manufacturing. It can not only optimize the automobile production process, but also improve the performance and safety of automobiles. It has been widely used in various parts of automobiles, such as airbag coatings, power transmission seals, gaskets, hoses, windshield linings, automobile engine seals, ignition wire and coil sheaths, automobile turbocharger cooling pipes, sealing and protection of automotive components, high-voltage cable and harness seals, etc.
Compared to traditional fuel vehicles, hybrid and pure electric vehicles have added many high-voltage components, such as power batteries, high-voltage distribution boxes, drive motors, motor controllers, etc., which also pose new requirements for automotive cables. Due to the high temperature and limited space of these cables arranged in the engine and chassis areas of the front cabin, they require flexible cables, small turning radii, and good resistance to high and low temperatures; Secondly, the road conditions are complex, and the wear resistance of cables must be good and the mechanical strength must be high; In addition, the speed of the vehicle varies from high to low, especially in harsh working conditions such as full load climbing, where instantaneous high currents require the cable to have short-term overload capacity.
In summary, new energy vehicle cables must have: good electrical insulation performance; Thermal stability and weather resistance; Has excellent corrosion resistance, oil and hydrophobic resistance, and flame retardant performance; The comprehensive mechanical performance is superior, with high flexibility and tear resistance.
At present, insulation materials for automotive power cables include cross-linked polyolefins and thermoplastic elastomers. The cross-linked polyolefin material can withstand heat up to 150 β, but its cables are relatively hard, inconvenient to install in narrow vehicle spaces, and require irradiation crosslinking. The process is complex and not suitable for large cross-section cables. The heat resistance of thermoplastic elastomer materials does not exceed 125 β, and the temperature level for power cables is relatively low. Moreover, the long-term use of thermoplastic elastomer materials in cables poses a risk of cracking.
High temperature resistant silicone rubber has high and low temperature resistance, ozone resistance, weather resistance, and excellent electrical insulation properties; Silicone rubber wire has a high current carrying capacity, saves conductor cross-section, and can meet the requirements of long-term full load operation; Fire resistance requirements can be achieved by adding flame retardants; Highly flexible and easy to install in limited spaces; High tear resistant silicone rubber, the pants can tear up to 25N/mm. Therefore, silicone rubber materials can make up for their shortcomings while integrating the advantages of cross-linked polyolefins and thermoplastic elastomers. Moreover, silicone rubber can reduce the weight of automobiles and carbon dioxide emissions, making it a high-quality choice for automotive power cables.
About High temperature resistant silicone material,Please check :
Liquid Silicone Rubber For Seal Parts IOTA M3055 
