Preparation method of novel flame-retardant cable material

Abstract

The invention provides a preparation method of a novel flame-retardant cable material. The preparation method comprises the following steps: a, mixing and smelting a thermoplastic polyurethane elastomer, a styrene elastomer, modified nanocrystal cellulose and modified magnesium hydroxide to obtain a material I; b, mixing the material I with an antioxidant, a lubricating agent, a halogen-free intumescent flame retardant, a plasticizer and deionized water, carrying out dispersion treatment, and then heating and stirring to obtain a material II; c, adding and mixing expanded graphite, magnesium stearate, a defoaming agent and a maleic anhydride stem grafting compatilizer into the material II, guiding the mixture into a double screw extrusion machine, and carrying out extrusion pelletization to obtain a material III; and d, drying the material III, and processing and forming the novel flame-retardant cable material. The preparation method provided by the invention is simple, low in cost and excellent in material flame retardant property, and has the advantages of excellent performance such as radiation resistance and insulation performance and excellent mechanical property and machining property.

Description

technical field [0001] The invention belongs to the technical field of electric power materials, and in particular relates to a preparation method of a novel flame-retardant cable material. Background technique [0002] Wires and cables have been used in the transmission of various electrical energy and signals for many years. Due to their light weight, excellent electrical insulation and easy molding, polymer materials have become the first choice for wire and cable materials. Traditional PVC cable materials, because they contain chlorine elements, have very good flame retardancy and are widely used in wire and cable materials. However, when it burns, it generates a large amount of toxic gas and smoke, which seriously endangers people's lives and property safety. The hydrogen chloride gas released when the PVC cable material is burned can also cause corrosion to the equipment, thereby causing "secondary pollution". [0003] Chinese Patent Publication No. CN1557867A, halog...

AI Technical Summary

Problems solved by technology

However, flame-retardant cable materials containing red phosphorus will emit a large amount of pungent odor and smoke during the production process and combustion, polluting the environment

In addition, although inorganic flame-retardant materials (boron-based, silicon-based, etc.) have the advantages of low toxicity, corrosion resistance, low price, and low smoke during combustion, they have some very serious shortcomings, such as low flame-retardant efficiency and thermal stability, causing a greater degree of deterioration of the physical and mechanical properties of the material