Chemical cross-linked cables generally refer to the selection of chemical cross-linked raw materials for the cable sheath of the cable. A common raw material is cross-linked polyethylene (XLPE).

The entire process involves using linear molecular formula high-pressure polyethylene (PE) raw materials according to special production and processing methods to produce cross-linked polyethylene with a three-dimensional network structure. Promoting the long-term allowable working temperature from 70 ℃ to 90 ℃ (or higher), and the allowable short circuit fault temperature from 140 ℃ to 250 ℃ (or higher), while maintaining its original high-quality electrical equipment performance, greatly improves the specific application performance.

Characteristics of irradiated cross-linked cables: The key to the aging time of cable insulation layer materials is their thermal aging time, which is determined by the rate of chemical changes such as thermal oxygen air oxidation, catalytic cracking, caustic cracking, and condensation reaction generated within the insulation layer material under thermal operation. Therefore, the thermal aging time of the insulation layer material immediately endangers the service life of the cable, According to the deduction of the chemical change kinetics model and the human accelerated thermal aging experiment, the long-term allowable working temperature of the irradiated cross-linked cable (20-30 years) is YJV-0.6/1KV for power engineering cables. If the rated working temperature is 105 degrees Celsius, the thermal aging time exceeds 60 years. If inferred based on the rated working temperature of 90 degrees, its thermal aging time exceeds 100 years.

Crosslinked polyethylene insulated cables use organic chemical or physical methods to change the molecular structure of high-voltage polyethylene in the cable insulation layer from a linear molecular formula to a network structure molecular formula of the behavior subject, that is, thermosetting high-pressure polyethylene is changed to thermosetting plastic cross-linked polyethylene, which further improves its temperature resistance and mechanical equipment performance, reduces its folding ability, and prevents it from melting again when exposed to heat, And maintained high-quality electrical equipment performance.