Flame-retardant polyethylene cable material with high elongation rate and cracking resistance

Abstract

The invention relates to a flame-retardant polyethylene cable material with high elongation rate and cracking resistance, wherein the flame-retardant polyethylene cable material can effectively overcome poor compatibility of an inorganic flame retardant and an organic material, and has the characteristics of high elongation rate and cracking resistance. The cable material comprises the componentsby weight: 32-45 parts of polyethylene resin, 15-25 parts of vinyl-acetate resin with the content of 18-28, 22-30 parts of the inorganic flame retardant, 1-10 parts of a toughening agent, 8-15 parts of an organic flame retardant, 0.5-1 part of an antioxidant, and 0.1-1 part of a lubricant. The flame-retardant polyethylene cable material has the advantages: firstly, the ethylene octene copolymer isadded, and the inorganic flame retardant is subjected to interfacial modification, and the compatibility of the inorganic flame retardant and the organic material is overcome; and secondly, with addition of a variety of organic and inorganic flame retardants, the flame retardant effect is the best, and the product has high-speed extrusion processability and excellent cracking resistance, as wellas excellent physical and mechanical properties.

Description

technical field [0001] The invention relates to a high-elongation anti-cracking flame-retardant polyethylene cable material which can effectively overcome the poor compatibility between inorganic flame retardants and organic materials and has high elongation and anti-cracking properties, belonging to the field of cable material manufacturing. Background technique [0002] CN106543514A, the name "a low-cost anti-cracking flame-retardant polyethylene cable material", including the following components by weight: 15-30 parts of polyethylene resin; 10-30 parts of compatibilizer; 2-10 parts of carbon black masterbatch ; 20-50 parts of flame retardant; 2-15 parts of silica gel masterbatch flame retardant; 0.2-2.0 parts of antioxidant; 0.2-2.0 parts of lubricant. Its shortcomings: First, because the inorganic flame retardant is composed of a high-temperature resistant solution added with ultra-fine inorganic metal oxides for fine processing, it is to add the inorganic elements with...

AI Technical Summary

Problems solved by technology

Its shortcomings: First, because the inorganic flame retardant is composed of a high-temperature resistant solution added with ultra-fine inorganic metal oxides for fine processing, it is to add the inorganic elements with essential flame retardancy to the flame retardant in the form of simple substances or compounds. In the substrate, it is fully mixed with the high polymer in a physically dispersed state, and plays a flame retardant role through chemical or physical changes in the gas phase or condensed phase, while the maleic anhydride grafted compatibilizer can improve the compatibility of inorganic fillers and organic resins. Improve the tensile and impact strength of the product, achieve high filling, reduce the amount of resin, improve the processing rheology, and improve the surface finish, but the maleic anhydride grafted compatibilizer will reduce the heat distortion temperature of the blend, or even degrade , so the affinity between polyethylene resin and inorganic flame retardant is very poor, resulting in poor crack resistance of the polyethylene cable material; the second is the poor expansion rate

Images