The core conductor material of wire harnesses is typically copper, with oxygen-free copper and tin-plated copper being the most common. Copper is widely used because of its stable conductivity, good ductility, and resistance to breakage under bending and vibration. Oxygen-free copper is suitable for applications requiring high conductivity, while tin-plated copper focuses on improving oxidation resistance, especially in humid or high-temperature environments, effectively extending service life and reducing changes in contact resistance.
Common insulation and outer protective materials include PVC (polyvinyl chloride), PE (polyethylene), XLPE (cross-linked polyethylene), and silicone rubber. PVC is relatively inexpensive and easy to process, making it a common choice for wire harnesses in many general equipment applications. PE and XLPE offer better heat resistance and mechanical strength, making them suitable for automotive or industrial equipment. Silicone rubber is more often used in high-temperature or high-flexibility environments, such as wiring harnesses around engines or internal connections in high-end electronic equipment.
The outer sheath and auxiliary materials of wire harnesses are also crucial, including corrugated tubing, braided braided sleeves, adhesive tape, and heat shrink tubing. Corrugated tubing is typically used for abrasion and pressure protection, while braided mesh sleeves prioritize tensile strength and aesthetics. Adhesive tape is primarily used for bundling and securing wire harness structures, and heat shrink tubing is commonly used for insulation and sealing at joints. The combination of these materials not only determines the mechanical strength of the wire harness but also directly impacts its stability and safety in complex environments.
