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 electric power, construction, communications, civil engineering, manufacturing, and petrochemical industry, 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 indispensable basic equipment for transmitting electric 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, Wide demand. Electric wires and cables in the field of new energy vehicles and rail locomotives belong to special types of electric wires and cables, and they may encounter various harsh natural environments during their use. These natural environments include large diurnal temperature variations, sunlight exposure, weathering, humidity, acid rain, freezing, and seawater. These natural environments can seriously affect the life and performance of wires and cables, and even reduce the reliability and safety of wires and cables, resulting in property losses and personal injury.

Therefore, on the basis of ensuring excellent insulation performance, it is generally necessary to have excellent waterproof, acid and alkali resistance, aging resistance, oil resistance, weather resistance, low smoke flame retardant, environmental friendly and harmless performance. Due to its flexible use, it is inevitable that there will be artificial bending, twisting, dragging, and other phenomena, 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 is widely used in wires and cables for new energy vehicles and rail locomotives, especially for wires and cables with high and low temperature resistance requirements. However, the performance of ordinary 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 in the long-term aging resistance, oil resistance, solvent resistance, water immersion breakdown voltage resistance, flame retardance, mechanical properties, and other important properties of silicone rubber. Some technical measures must be taken to improve and balance the long-term aging resistance, flame retardance Mechanical properties (especially tear resistance), acid and alkali resistance, oil resistance, voltage resistance, impact resistance, solvent resistance, and other properties can meet industry requirements.

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