Cross-linked polyethylene insulation is made by chemical or physical methods to change the polyethylene molecule from linear molecular structure to three-dimensional network structure, from thermoplastic material to thermosetting material, and to increase the working temperature from 70℃ to 90℃, which significantly improves the material performance.
Cross-linked polyethylene has the following advantages.
1、Heat-resistant performance; XLPE with three-dimensional mesh structure has very excellent heat-resistant performance. It will not disintegrate and carbonize under 200°C.
The long-term working temperature can reach 90℃, and the thermal life can reach 40 years.
2、Insulation performance: XLPE keeps the original good insulation characteristics of PE, and the insulation resistance is further increased. Its dielectric
The dielectric loss angle tangent value is very small, and is not greatly affected by temperature.
3、 Mechanical properties: Due to the establishment of new chemical bonds between the macromolecules, the hardness, stiffness, wear resistance and impact resistance of XLPE are improved.
The hardness, stiffness, abrasion resistance and impact resistance of XLPE are improved due to the establishment of new chemical bonds between the macromolecules, thus compensating for the shortcomings of PE which is easily cracked by environmental stress.
4、 Chemical resistance: XLPE has strong acid and alkali resistance and oil resistance, and its combustion products are mainly water and carbon dioxide.
It is less harmful to the environment and meets the requirements of modern fire safety.
Post time: Nov-03-2022