Anti-aging high-temperature-resistant silane crosslinked polyethylene cable material and preparation method therefor

Abstract

The present invention discloses an anti-aging high-temperature-resistant silane crosslinked polyethylene cable material. The anti-aging high-temperature-resistant silane crosslinked polyethylene cable material is characterized by being prepared from the following raw materials in parts by weight: 100 parts of high-density polyethylene, 15-20 parts of nylon 6, 12-15 parts of polyvinyl alcohol fibers, 1.4-2.7 parts of nanotin antimony oxide, 0.2-0.4 part of an anti-aging agent MB, 4.5-6.5 parts of triallyl isocyanurate, 2.3-3.5 parts of maleic anhydride, 16-21 parts of plant ash, 40-50 parts of a silica sol, 2-4 parts of aluminum potassium sulfate, 1.1-2.2 parts of calcium sulfate, 0.7-0.9 part of bismuth titanate, 15-18 parts of triethoxyoctylsilane and an appropriate amount of water. The tearing resistance of the cable material can be improved by adding the polyvinyl alcohol fibers; a net structure formed by cross-linking triethoxyoctylsilane with polyethylene is added, so that oily substances can be effectively prevented from permeating and diffusing into blending material molecules so as to show a good barrier property, and are blended with modified nylon 6; moreover, the cable material prepared by adding other effective auxiliaries has the characteristics of being anti-aging, high-temperature-resistant, high in crosslinking speed, short in process step and unharsh in process condition.

Description

technical field [0001] The invention relates to the technical field of cable materials, in particular to an aging-resistant and high-temperature-resistant silane crosslinked polyethylene cable material and a preparation method thereof. Background technique [0002] With the development of modern science and technology, people have higher and higher quality requirements for wires and cables. The appearance of silane cross-linked polyethylene makes up for the shortage of ordinary polyethylene wires and cables. Silane cross-linked polyethylene cable material can improve the transmission capacity and overload capacity of the line, and when the material is used to manufacture cross-linked wires and cables, compared with peroxide cross-linking and radiation cross-linking, the required manufacturing equipment is simple and easy to operate. Convenience, comprehensive low cost and other advantages, as the insulating material of low-voltage power cables, it has become the leading mater...

AI Technical Summary

Problems solved by technology

[0003] High-density polyethylene is cheap, light in weight, and excellent in performance, but the linear molecular structure of high-density polyethylene determines its performance defects at higher temperatures, such as decreased intermolecular bonding, prone to deformation, and creep Increase, rigidity and mechanical properties decrease; high-density polyethylene is a non-polar polymer. Although it has good barrier properties to polar solvents such as water, it has high permeability to organic solvents such as xylene and gas barrier properties. not good too

Nylon is a polar polymer, which has good barrier properties to non-polar solvents and gases, but poor barrier properties to polar solvents, and nylon is easy to absorb water, thereby reducing the mechanical properties of the material

Blending high-density polyethylene modified by silane cross-linking with nylon can improve the barrier properties of cable materials, but its function is relatively single. There are still defects in sunlight resistance and other aspects