Low-smoke halogen-free flame-retardant cable material

Abstract

The invention discloses a low-smoke halogen-free flame-retardant cable material, and belongs to the field of materials. The low-smoke halogen-free flame-retardant cable material solves the problem that an existing cable material is poor in mechanical property and electrical property. The low-smoke halogen-free flame-retardant cable material is composed of 50-60 parts of high density polyethylene, 20-30 parts of ethylene-ethyl acrylate copolymers, 20-30 parts of methyl vinyl silicone rubber resin, 1-3 parts of magnesium stearate, 2-5 parts of novolac epoxy resin, 15-25 parts of isopropyl phenyl diphenyl phosphate, 1-2 parts of dilauryl thiodipropionate, 10-20 parts of dimellitate, 1-2 parts of antioxidants 1010, 1-1.5 parts of antioxidants CA, 10-20 parts of maleic anhydride grafting ethylene-octylene copolymers, 5-10 parts of polysiloxane, 20-30 parts of nano magnesium hydroxide, 13-18 parts of nano clay, 3-7 parts of zinc oxide, 5-10 parts of polyethylene wax and 3-8 parts of calcium stearate. The low-smoke halogen-free flame-retardant cable material can be widely used as insulation and sheathing materials of various electric wires and cables.

Description

technical field [0001] The invention relates to a low-smoke halogen-free flame-retardant cable material, which belongs to the field of materials. Background technique [0002] Polyolefin compositions have been widely used in various fields due to their low relative density, good chemical and water resistance, good mechanical strength and electrical insulation, and elasticity while maintaining good thermoplasticity. When polyolefins are used in wires and cables, flame retardants need to be added to them. At present, most of the flame retardants used in polyolefins are halogen flame retardant systems, which have good flame retardant effect and high cost performance, but are very harmful to the environment. , its flame retardant mechanism determines that smoke will be emitted during the flame retardant process, and corrosive gases will be generated, which will cause serious damage to the environment and human body. [0003] Low-smoke, halogen-free, flame-retardant cables are t...

AI Technical Summary

Problems solved by technology

When polyolefins are used in wires and cables, flame retardants need to be added to them. At present, most of the flame retardants used in polyolefins are halogen flame retardant systems, which have good flame retardant effect and high cost performance, but are very harmful to the environment. , its flame retardant mechanism determines that smoke will be emitted during the flame retardant process, and corrosive gases will be generated, which will cause serious damage to the environment and human body

[0003] Low-smoke, halogen-free, flame-retardant cables are the same as ordinary cables in non-fire conditions, so they must have certain mechanical, physical and electrical properties to meet the requirements of cables. As the base material, its flame retardant performance can be improved by adding flame retardants. The addition of a large amount of flame retardants will lead to the deterioration of the mechanical and physical properties, electrical properties and processing properties of the material.

In addition, under the long-term thermal aging and environmental effects of these materials, the chemical bonds between molecules will break, generating active free radicals or active ions, triggering degradation reactions, oxidation reactions, and isomerization reactions of macromolecular chains, and the final result is polymers. The molecular weight of the material is getting smaller and smaller, and even loses the properties of the polymer, so that the performance of the cable insulation material is greatly reduced. The mechanical and electrical performance indicators of the existing low-smoke halogen-free flame-retardant cables are slightly lower than ordinary materials.