Characteristics of single-layer and double-layer corrugated tubes for protecting the corrugated tubes of automotive wiring harnesses.  

Automotive wiring is an important component of a car, and the functions and signal transmission in an automobile circuit are carried out using an automobile wiring harness that acts as a bridge. The automotive wiring harness is attached to the entire vehicle body, and damage to the harness directly affects the performance of the automotive electrical wiring. Articles 4.11 through 4.15 of the Low Voltage Automotive Wiring Harness Specification (QC/T29106-2004) specify that automotive wiring harnesses must be resistant to high and low temperatures, temperature and humidity variations, vibration, smoke, and industrial solvents. Therefore, the external protection of the wiring harness plays a decisive role. Reasonable external protection materials and wire harness winding methods can not only ensure the quality of the harness, but also reduce costs and improve economic efficiency.
Corrugated plastic tubing for automotive wiring harnesses is made by heating and extrusion from materials such as PA (nylon 6), PE (polyethylene) and PP (polypropylene). They are widely used in industries such as mechanical engineering and automotive to protect wiring harnesses. The operating temperature of corrugated pipes is usually between -40℃ and +130℃, and can briefly reach +140℃. Both the inner and outer surfaces have a wavy structure, which provides good flexibility, torsion resistance, excellent bending characteristics and oil resistance.

The inner and outer surfaces of plastic corrugated pipes have a wavy structure, good flexibility, torsion resistance and excellent bending performance. They withstand strong pressure from footsteps without breaking or deforming, and quickly regain their shape without causing harm to themselves. Nylon corrugated pipes produced by Desheng Electric include single-layer and double-layer corrugated pipes. Nylon single and double layer connecting pipes are mainly used to protect wires and cables from external damage, and can also improve the bending aesthetics of incoming and outgoing cables.

Single-layer corrugated pipes are now widely used and are highly cost-effective, making them the preferred choice for many customers. The color is usually black, but other colors are also found. Plastic corrugated pipes are mainly used in industries such as electronics, wiring harness manufacturing, automobile manufacturing, mechanical engineering and machine tool manufacturing. The design process places strict requirements on compensation, load-bearing capacity, stiffness and fatigue life to ensure product quality and performance meet standards.

Double-layer corrugated pipes have much better fatigue strength and load-bearing capacity than single-layer corrugated pipes for critical cables or lines at the same load-bearing capacity. Polypropylene pipes made by winding method are mainly used in optical cable lines, power plants and energy industries. Due to the specific nature of the application industries, the requirements for their characteristics are also higher. In recent years, the market demand for double-layer corrugated pipes has been gradually increasing. Besides the general electrical and optical cable industries, high-end automobile brands and robotics industries also highly value the performance of double-layer corrugated pipes.