Irradiation crosslinked LSOH (low smoke halogen-free) high-flame-retardant polyolefin cable material and preparation method thereof

Abstract

The invention relates to an irradiation crosslinked LSOH (low smoke halogen-free) high-flame-retardant polyolefin cable material and a preparation method thereof. The preparation method is characterized in that the irradiation crosslinked LSOH high-flame-retardant polyolefin cable material is prepared from linear low-density polyethylene resin, an ethylene-vinyl acetate copolymer, an ethylene-ethyl acrylate copolymer, aluminum hydroxide, magnesium hydroxide, 3.5 hydrated zinc borate, a high-viscosity organic silicon mixture, magnesium stearate, a phosphorus-containing halogen-free flame retardant, polyethylene wax, an antioxidant, a crosslinking agent, and the like through the steps of mixing the raw materials by using a closed mixing machine and then carrying out extrusion by using a six-temperature-period twin-screw extruder. An electric wire and a cable prepared by taking the irradiation crosslinked LSOH high-flame-retardant polyolefin cable material as an insulating layer not only have the advantages of good flame retardance, high light transmittance, good electrical insulation, good water resistance and the like, but also have the characteristics of high-temperature resistance level (can be used for a long time in a 105 DEG C environment), good mechanical and physical properties of insulating layers, and the like. The irradiation crosslinked LSOH high-flame-retardant polyolefin cable material can be used as a raw material of LSOH high-flame-retardant insulating layers of electric wires.

Description

technical field [0001] The invention relates to a plastic particle and a preparation method thereof. Specifically, it is a raw material and a preparation method for making a low-smoke, halogen-free, high-flame-retardant wire insulation layer. Background technique [0002] With the rapid development of my country's metallurgy, electric power, electronics, automation and information network industries, the consumption of flame-retardant wires and cables, power cables, control cables, signal cables, instrumentation cables, computer cables, etc. Dramatic increase. [0003] Most traditional flame-retardant cables use polyvinyl chloride as insulation or sheath. Although polyvinyl chloride has the characteristics of good flame retardancy, low price, and good extrusion process, because it contains halogen, it will release a large amount of hydrogen halide gas and dense smoke when it is burned in a fire, causing the "secondary hazard" of the fire, thus Increased fire damage. It ha...

AI Technical Summary

Problems solved by technology

However, the low-smoke, halogen-free, flame-retardant polyolefin cable materials currently on the market have defects such as low flame retardancy, poor electrical insulation performance, and poor water resistance. Requirements for halogen-free flame-retardant building fabric wires