Shielding cable for polyethylene insulated olefin sheath computer

Abstract

The invention provides a shielding cable for a polyethylene insulated olefin sheath computer. The shielding cable is characterized in that the shielding cable includes a conductor layer, an insulationlayer is extruded outside the conductor layer, a winding layer is arranged outside the insulation layer, a braid layer is arranged outside the winding layer, a winding layer is arranged outside the braid layer, a braid layer is arranged outside the winding layer, and a sheath layer is extruded outside the braid layer. The shielding cable has the properties of low temperature resistance, torsion resistance, environmental protection and the like. According to the cable, polyethylene with a low dielectric constant is selected for insulation, the cable has low temperature resistance performance (a lowest use temperature can reach -70 DEG C to -100 DEG C) and good chemical stability and can resist the erosion of most of the acid and alkali erosion (does not resist acid with oxidation properties), and the cable is insoluble in common solvents at a room temperature and has low water absorption and excellent electrical insulation performance. In addition, the sheath is made of a low-smoke andhalogen-free polyolefin material, the amount of fume during combustion is small, no toxic gas is produced, and the cable is environment-friendly. A copper wire layer with the density of 80% is tightly woven around the winding layer, and the cable has a good anti-torsion effect.

Description

technical field [0001] The invention relates to a shielded cable for a computer, in particular to a shielded cable for a computer with a polyethylene insulated olefin sheath. Background technique [0002] At present, in domestic high-rise buildings, petroleum, mining, metallurgy, ships, power stations, subways, tunnels and other occasions with high explosion-proof and fire-proof safety conditions, most of the cable insulation and sheath layers used are made of halogen-containing materials. When the cable burns, it can produce a large amount of dense smoke, and the dense smoke contains a large amount of hydrogen halide gas, which endangers human safety, equipment and the environment. According to the analysis of the causes of 1,464 people killed in 393 building fires in the United States, 1,062 people died of poisoning and hypoxia, accounting for 75.5% of the total number of deaths, and 359 people were directly burned to death by flames, accounting for only 24.4%. . A large...

AI Technical Summary

Problems solved by technology

A large amount of smoke and poisonous gas will knock people down, and they will be burned to death because they cannot leave the scene, and it will also make it difficult to fight the fire on the spot.

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