The insulation performance of plastic products special cable materials is crucial to ensure the safe and stable operation of cables, and its improvement involves a variety of technologies and key factors.
First of all, the selection of base materials is one of the key factors. Use high-purity polymer resin as the matrix, such as cross-linked polyethylene (XLPE), which has good electrical insulation properties and stability. By controlling the degree of polymerization and molecular structure of the resin, its insulation properties can be optimized and impurities and defects reduced, thus laying a solid foundation for insulation performance.
The rational use of additives can also significantly improve insulation performance. For example, adding an appropriate amount of antioxidants can prevent cable materials from oxidizing during long-term use, resulting in a decrease in insulation performance. Antioxidants can capture free radicals, inhibit the occurrence of oxidation reactions, and extend the service life of cable materials. At the same time, adding appropriate inorganic fillers, such as kaolin, talc, etc., can improve the dielectric strength and volume resistivity of cable materials and enhance their insulation capabilities.
Cross-linking technology is an important means to improve insulation performance. Through physical or chemical cross-linking methods, a three-dimensional network structure is formed between polymer molecular chains to improve the material's heat resistance, mechanical strength and insulation properties. For example, using electron beam cross-linking or chemical cross-linking agents for cross-linking treatment can enable cable materials to maintain good insulation stability in high-temperature environments, effectively preventing aging and breakdown of the insulation layer.
Optimization of the production process also has an important impact on insulation performance. During the extrusion molding process, precise control of parameters such as processing temperature, screw speed, and extrusion pressure can ensure the uniformity and density of the cable material, reduce internal pores and defects, and thereby improve the insulation performance. At the same time, multi-layer co-extrusion technology can be used to form insulating layer structures with different functions, further improving the overall insulation effect of the cable.
The cleanliness of cable materials is also a factor that cannot be ignored. During the production process, the purity of raw materials and the cleanliness of the production environment are strictly controlled to prevent impurities from being mixed into the cable materials. Even trace amounts of metal impurities or other conductive particles may reduce insulation performance, causing partial discharge or even breakdown accidents.
In addition, the environmental resistance of cable materials is also closely related to the insulation performance. For example, improving the water resistance, chemical corrosion resistance and weather resistance of cable materials can maintain good insulation properties in harsh environments such as moisture, acid and alkali, and ensure reliable operation of cables.
The improvement of the insulation performance of plastic products special cable materials requires starting from many key factors such as basic material selection, additive application, cross-linking technology, production process optimization, cleanliness control and environmental adaptability. Only by comprehensively using various technical means can we meet the needs of modern times. Cables require high insulation performance to ensure the safety and stability of power transmission.
