Although the wire and cable industry is only a supporting industry, it accounts for 1 / 4 of the output value of China's electrical industry and is the basis of all industries. It involves electric power, construction, communication, civil, manufacturing, petrochemical and other industries, and is closely related to all sectors of the national economy. Wires and cables are also known as the "arteries" and "nerves" of the national economy. They are indispensable basic equipment for the transmission of electric energy, the transmission of information, the manufacture of various motors, instruments and meters, the realization of electromagnetic energy conversion, and the future electrification The necessary basic products in the information society are widely needed.



Wires and cables in the field of new energy vehicles and rail locomotives belong to special wires and cables. In the process of use, they will encounter various harsh natural environments. These natural environments will seriously affect the service life and performance of wires and cables, even reduce the reliability and safety of wires and cables, resulting in property loss and personal injury. Therefore, on the basis of ensuring excellent insulation performance, it is generally required to have excellent waterproof, acid and alkali resistance, aging resistance, oil resistance, weather resistance, low smoke flame retardant, environmentally friendly and harmless performance. And because of the flexible use, it is inevitable that there will be artificial bending, twisting, dragging and other phenomena, which is very easy to cause mechanical damage, but also requires the cable to have excellent flexibility, flexibility, wear resistance, mechanical properties.

Due to its excellent comprehensive performance, silicone rubber has been widely used in the wires and cables of new energy vehicles and rail locomotives, especially the wires and cables with high and low temperature resistance. However, the performance of general silicone rubber materials can not fully meet the use requirements of new energy cables, and can not guarantee the safe operation and service life of new energy cables. It is mainly reflected in some defects of silicone rubber's long-term aging resistance, oil resistance, solvent resistance, immersion breakdown voltage resistance, fire resistance, mechanical properties and other important properties, which must be improved and balanced by some technical means The long-term aging resistance, fire resistance, mechanical properties (especially tear resistance), acid and alkali resistance, oil resistance, voltage resistance, impact resistance, solvent resistance and other properties of silicone rubber can meet the industry requirements.

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