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 foundation of various industries. It involves industries such as electricity, construction, communication, civil use, manufacturing, and petrochemicals, and is closely related to various sectors of the national economy. Wire and cable are also known as the "arteries" and "nerves" of the national economy. They are essential basic equipment for transmitting electrical energy, transmitting information, manufacturing various motors, instruments, and meters, and achieving electromagnetic energy conversion. They are necessary basic products in the future electrification and information society, with a wide demand.

The wires and cables in the fields of new energy vehicles and rail locomotives belong to special types of wires and cables, and they will encounter various harsh natural environments during use. These natural environments, including significant temperature differences between day and night, sunlight exposure, weathering, humidity, acid rain, freezing, and seawater, can seriously affect the lifespan and performance of wires and cables, and even reduce their reliability and safety, causing property damage and personal injury. Therefore, it is generally necessary to have excellent waterproof, acid and alkali resistant, aging resistant, oil resistant, weather resistant, low smoke flame retardant, environmentally friendly and harmless properties on the basis of ensuring excellent insulation performance. Due to its flexible use, it is inevitable that there will be phenomena such as artificial bending, twisting, and dragging, which can easily cause mechanical damage. It is also required that the cable have excellent flexibility, flexibility, wear resistance, and mechanical properties.

Due to its excellent comprehensive performance, silicone rubber has been widely used in new energy vehicles and railway locomotive wires and cables, especially those with high and low temperature resistance requirements. However, the general performance of silicone rubber materials cannot fully meet the requirements for the use of new energy cables, and cannot guarantee the safe operation and service life of new energy cables. This is mainly reflected in certain defects of the long-term aging resistance, oil resistance, solvent resistance, water immersion breakdown voltage resistance, flame retardancy, mechanical properties and other important properties of silicone rubber. Some technical means must be used to improve and balance the long-term aging resistance, flame retardancy, mechanical properties (especially tear resistance), acid and alkali resistance, oil resistance, voltage resistance, impact resistance, solvent resistance and other properties of silicone rubber in order to meet industry requirements.

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