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• Time of issue:2021-08-15 18:09
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(Summary description)
　　The automobile wiring harness is fixed on the entire vehicle body, and the damage of the wiring harness directly affects the performance of the automobile circuit. Here is an introduction to the characteristics and usage scenarios of various threading protective wraps for automobile wiring harnesses. Automotive wiring harnesses should have high and low temperature resistance, resistance to temperature and humidity cycle changes, vibration resistance, smoke resistance and industrial solvent resistance. Therefore, the outer protection of the wire harness plays a vital role. A reasonable outer protection material for the wire harness can not only ensure the quality of the wire harness, but also reduce costs and improve economic benefits. The most common way to protect automobile wiring harness is to thread the corrugated pipe. The following describes the threading corrugated pipe used for the automobile wiring harness in detail.
　　 Threading plastic corrugated pipe:
　　Plastic corrugated pipe occupies a large amount in car wiring harness wrapping. The main feature is good abrasion resistance, high temperature resistance, flame retardancy, and heat resistance in high temperature areas. The temperature resistance is generally between -40 and 150°C.
　　According to the dressing requirements, plastic corrugated pipes are generally divided into closed corrugated pipes and open corrugated pipes.
　　 Closed bellows and wire harness clamps can have a good waterproof effect, but it is more difficult to assemble. The open corrugated pipe is commonly used in ordinary wiring harnesses and is relatively easy to assemble. According to different wrapping requirements, PVC tapes are usually wrapped around the corrugated pipe of the wire harness in two ways: full winding and point winding. To
　　According to the material, the commonly used plastic corrugated pipes for automotive wiring harnesses are divided into four types: polypropylene (PP), nylon (PA6), polypropylene modified (PPmod) and triphenyl phosphate (TPE). Commonly used inner diameter specifications range from 4.5 to 40.
　　PP corrugated pipe has a temperature resistance of 100°C, which is the most used type in the wiring harness
　　PA6 corrugated pipe has a temperature resistance of 120℃, which is more prominent in flame retardancy and abrasion resistance, but its bending resistance is lower than that of PP material.
　　PPmod is an improved polypropylene, with a temperature resistance level of 130°C.
　　 TPE has a higher temperature resistance grade, reaching 175°C. ,
　　The basic color of the bellows is black, some flame retardant materials are allowed to be slightly gray-black, and yellow can be used for special requirements or warning purposes (such as airbag wiring harness bellows)