Architectural high-insulativity low-smoke halogen-free flame-retardant cable material and preparation method thereof

Abstract

The invention relates to an architectural high-insulativity low-smoke halogen-free flame-retardant cable material which is prepared from the following raw materials in parts by weight: 0.9-1.1 parts of hollow glass microsphere, 1-1.5 parts of silane coupling agent KH-550, 0.5-1 part of molybdenum disulfide, 20-25 parts of magnesium hydroxide, 20-25 parts of aluminum hydroxide, 9-10 parts of polyacrylonitrile, 6-7 parts of polylactic acid, 3-4 parts of polyoxyethylene, a right amount of dimethylformamide, a right amount of double solvent composed of dimethylformamide and dichloromethane in a volume ratio of 1:1, a right amount of methyl methacrylate, a right amount of isopropyl thioxanthene ketone, 50-55 parts of crosslinked polyethylene and 4-5 parts of metallocene polyethylene. The hollow glass microsphere enhances the insulativity, heat resistance and lubricating property of the cable material, so that the cable material can be extruded and processed more easily. The silane coupling agent KH-550 is added to enhance the binding force between the hollow glass microsphere and resin. The technique solves the problem of the phenomenon of agglomeration due to nonuniform dispersion of the inorganic filler.

Description

technical field [0001] The invention relates to the field of cable materials, in particular to a high-insulation 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 prot...

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