What are the characteristics of an automotive complete wiring harness overcoat?

Nowadays, the commonly used automobile wiring harness is vehicle wiring harness processing. It is widely used in various places and is used in life or work. What are the characteristics of the structure of the automobile wiring harness outer quilt? Automobile wiring harnesses can be roughly divided into the following points: 1. It has the characteristics that A is good tensile strength and elongation. It is also the current insulating coating material with strong toughness, wear resistance and corrosion resistance. With the continuous improvement of people's requirements for comfort, economy and safety, the types of electronic products on automobiles are also increasing. Automobile wiring harnesses are becoming more and more complex, and the failure rate of their wiring harnesses is also increasing accordingly. 2. With the increase of density, the softening temperature increases, the tensile strength increases, the elongation decreases, the softness gradually loses, the strength and toughness increase, and the impact strength gradually decreases. Because of its low dielectric constant and high insulation impedance, pe has excellent electrical performance and is often used in coaxial cables or high-frequency materials. The weakness is that it is flammable, and the A execution temperature is 80 °C. 3. The specific gravity of pvc is about 1.4. With the continuous improvement of people's requirements for comfort, economy and safety, the types of electronic products on automobiles are also increasing. Automobile wiring harnesses are becoming more and more complex, and the failure rate of their wiring harnesses is also increasing accordingly. Each end of the new energy vehicle wiring harness will be marked with sign numbers and letters to indicate the connection object of the wires. The operator can see that the sign can be correctly connected to the corresponding wires and electrical devices, which is particularly useful when repairing or replacing the wiring harness. The surface is white powder. Water resistance, acid and alkali resistance, flame resistance and electrical insulation are all very good. It also has good oil resistance, ozone resistance and drug resistance, and is non-toxic. Therefore, it is used as a material for cable insulation and coating. However, pvc is an A material with poor dielectric properties, so it is generally limited to pvc wires below 600v, wires in communication offices, and cable coating. pvc softens at 65-85 °C, and has complete plasticity at 120-150 °C. If it is above 190 °C, it decomposes violently. Hydrochloric acid gas is released, so the appropriate temperature range for processing A is about 150-180 °C. 4. High contraction rate, easy shrinkage by injection molding, automobile wiring harness has good electrical characteristics, good water resistance, wear resistance, and chemical resistance, and is important as an insulation material for telephone and communication cables.

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