Plastic corrugated tubes for automotive cable bundles are made by heating and extruding materials such as PA (nylon 6), PE (polyethylene) and PP (polypropylene). They are widely used in mechanical engineering, the automotive industry and other industries to protect cable bundles. The operating temperature range of corrugated pipes is usually -40℃ to +130℃, and they can withstand temperatures up to +140℃ in the short term. Both the inner and outer surfaces of the pipes have a corrugated structure, which provides them with excellent flexibility, resistance to bending, good bending ability and resistance to oils.
Due to the wavy structure of both the internal and external surfaces, plastic corrugated tubes are highly flexible, resistant to bending and easy to bend. They can withstand strong pressure (such as when you hit your foot) without breaking or deforming, and they also recover quickly without any damage. Nylon corrugated tubes produced by Desheng Electric include single-layer and double-layer models. These nitrile single and double layer corrugated tubes are mainly used to protect wires and cables from external damage and also to improve the aesthetics of incoming and outgoing cable bends.
Single-layer corrugated tubes are now widely used and have a high price-performance ratio, making them the preferred choice for many customers. They are usually black, but other colors are available. In the electronics, cable bundle, automobile, machinery and machine tool industries, plastic corrugated tubes are subject to strict requirements for expansion capacity, pressure resistance, stiffness and fatigue resistance in design to ensure that product quality and performance meet optimal standards.
For critical cables or circuits, double-layer corrugated tubing is superior to single-layer in terms of fatigue resistance and pressure resistance under equal load. PP wound tubes are primarily used in fiber optic lines, power plants and power grids. Due to the specifics of the industries used, more stringent requirements are imposed on their characteristics. Over the past year, the market demand for double-layer corrugated tubes has been gradually increasing. In addition to the general electrical and fiber optic industries, high-end automobile brands and the robotics industry also appreciate the performance of double-layer corrugated tubes.
Automotive electrical circuits are an important part of a vehicle, and the transmission of functions and signals in automotive circuits is carried out through automotive cable bundles that serve as conductors. Automotive cable bundles are secured over the entire surface of the body, and their damage directly affects the operation of automotive electrical circuits. In accordance with paragraphs 4.11–4.15 of the Specification for Low Voltage Automotive Cable Assemblies (QC/T29106-2004), automotive cable assemblies must be resistant to high and low temperatures, cyclic changes in temperature and humidity, vibration, smoke and industrial solvents. Therefore, the external protection of cable bundles plays a decisive role: the correct choice of external protection materials and winding methods not only guarantees the quality of the cable bundles, but also reduces costs, increasing economic efficiency.
