High strength low smoke halogen-free flame retardant cable material for buildings and preparation method thereof

Abstract

The invention relates to a high strength low smoke halogen-free flame retardant cable material for buildings. The cable material is prepared from the following raw materials by weight part: 0.5-0.7 of paraffin oil, 1-1.5 of silicon carbide whisker, 20-25 of magnesium hydroxide, 20-25 of aluminum hydroxide, 9-10 of polyacrylonitrile, 6-7 of polylactic acid, 3-4 of polyethylene oxide, a proper amount of dimethyl formamide, a proper amount of a composite solvent of dimethyl formamide / dichloromethane in a volume ratio of 1:1, a proper amount of methyl methacrylate, a proper amount of isopropyl thioxanthone, 50-55 of crosslinked polyethylene, and 4-5 of organic silicone. By using silicon carbide whisker, the cable material has high temperature resistance and high strength, good flame retardance, and can prevent fire, thus increasing the safety of building cables. The invention solves the agglomeration phenomenon caused by uneven dispersion of inorganic filler, the filler is distributed evenly and is coated in the matrix resin, thus being conducive to interface bonding of the filler and the matrix resin. And the formed fiber substantially improves the wear resistance and toughness of the cable material.

Description

technical field [0001] The invention relates to the field of cable materials, in particular to a high-strength low-smoke halogen-free flame-retardant cable material for construction and a preparation method thereof. Background technique [0002] In recent years, with the development of the economy, especially the rapid development of industries such as electric power, electronics and information technology, the consumption of matching flame-retardant wires and cables has increased sharply. High, although the traditional PVC sheath material has good flame retardancy, low price, and easy processing, it will emit a large amount of hydrogen halide gas and dense smoke when it burns, causing "secondary hazards" of fire, which is harmful to human health and the environment. The damage is great. Nowadays, people pay more and more attention to environmental protection, especially in subways, ships, buildings, household appliances and other environments with high environmental protec...

AI Technical Summary

Problems solved by technology

However, due to the low mechanical strength and hardness of the ethylene vinyl acetate copolymer material, the material has low mechanical strength and poor wear resistance, resulting in damage to the cable surface sheath during the installation and laying of the cable, especially for large cross-section cables. Once the cable sheath is broken, it may cause the instability of the power grid system, and the cable body will be subjected to various damages, which cannot effectively protect the effective operation of the cable; and the existing low-smoke, halogen-free, flame-retardant sheath materials have poor adhesion, affecting Efficient use of cables

[0004] At present, the main problems of low-smoke halogen-free flame-retardant sheath materials are easy to scratch, corrode, wear, break, difficult extrusion processing, easy to crack, easy to heat deformation, aging and other problems. It is necessary to improve the process and materials to improve the quality of the cable. Material properties