Automotive wiring harness is an important part of the automotive circuit, automotive wiring harness design is one of the conditions to ensure the safety of automobile driving. This paper introduces the selection of raw materials for the wrapping of automotive wiring harness design.
Automotive wiring harnesses are in the car for a long time due to a variety of external factors, such as oil, dust, friction, imitation of water rust, etc., if there is no protective material on the wiring harness, the wire is exposed to damage, such as broken wire short circuit, etc., which may result in functional failure. Several materials commonly used for wrapping are as follows:
Corrugated Conduit
Corrugated conduit is the most crucial material used in automotive wiring harnesses, generally divided into unilaterally open and sealed types.
Materials such as PE, PA6/66, PP, etc., are commonly used, with temperature resistance typically ranging from -40°C to 85°C, -40°C to 125°C, and -40°C to 150°C. It exhibits good abrasion resistance and performs well in high-temperature zones, demonstrating excellent heat resistance and flame retardancy. PA material excels in flame resistance and abrasion resistance, while PP material has advantages in resisting bending fatigue.
Tapes
Tapes are the most widely used wrapping method in wiring harnesses, primarily categorized into three types: PVC tape, cloth tape, and fleece-based tape.
PVC tape offers good insulation performance with a temperature resistance typically around 80°C, and after improvements, it usually reaches 105°C. However, it tends to perform poorly in noise reduction, and the completed wrap can make the wiring harness relatively stiff. Currently, its Volatile Organic Compounds (VOC) effect is generally subpar. Cloth tape and fleece-based tape both have PET as their base material. Cloth tape has a temperature resistance of around 105°C, excellent noise reduction properties, and results in a relatively soft wiring harness after wrapping. Fleece-based tape boasts the best abrasion resistance, often achieving abrasion resistance levels of D or E, and temperature resistance of up to 150°C. However, it comes at a higher cost and is typically used in areas with through-holes or relative movement.
Braided Mesh Conduit
Braided mesh conduit is typically woven from PA66 monofilament or PET monofilament. It comes in open and closed types and is characterized by its exceptionally high abrasion resistance. However, it tends to have higher costs and may not be as effective in noise reduction. It is commonly used in areas with prolonged relative motion.
The automotive wiring harness is known as the car’s vascular system, with the rapid development of automobiles and the use of experience continues to improve, the requirements of the automotive wiring harness is also increasing, the more need for automotive wiring harness people continue to research and development of new programs, in order to cope with the ever-changing needs.
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