Water-tree-retardant breakdown-resistant flame-retardant power cable material and preparation method thereof

Abstract

The invention discloses a water-tree-retardant breakdown-resistant flame-retardant power cable material which is prepared from the following raw materials in parts by weight: 84-86 parts of high-density polyethylene, 15-17 parts of decabromodiphenyl oxide, 7-9 parts of antimony trioxide, 2-3 parts of metallocene polyethylene, 2-3 parts of nano magnesium hydroxide, 4-5 parts of cyclohexane, 0.2-0.3 part of gamma-aminopropyltriethoxy silane, 3-4 parts of calcium stearate, 4-6 parts of montmorillonite, 0.1-0.2 part of triallyl isocyanurate, 8-10 parts of zeolite molecular sieve, 1.2-1.5 parts of isobutenyltriethoxy silane, 13-15 parts of low-density polyethylene and 2-3 parts of microcrystalline wax. The zeolite molecular sieve and other adsorbing particles are utilized to restrict the movement of moisture on the high-density polyethylene interface, thereby effectively inhibiting the initiation and growth of the water tree. The power cable material has the advantages of flame retardancy, breakdown resistance, favorable corrosion resistance and favorable aging resistance, obviously prolongs the service life of the cable, and is suitable to be used as a cable in a moist environment.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a water-tree-resistant and breakdown-resistant flame-retardant power cable material and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is a general-purpose plastic with a wide range of uses. According to the amount of plasticizer added, it can be made into rigid, semi-rigid and soft products, and can also be modified by blending with other polymers. , made into a wide variety of products with different properties, the amount is very large, it is one of the world's top five general-purpose plastics. The global demand for PVC resin ranks the top three along with polyethylene and polypropylene, while its consumption in China has risen to the first place. Polyvinyl chloride itself is also an intrinsically flame-retardant material, with a high oxygen index and a good flame-retardant effect, but pure PVC is a rigid segment, which begins ...

AI Technical Summary

Problems solved by technology

Among them, blending technology is the most widely used method to improve the dielectric properties of polyethylene, but the blending of different components will form a microscopic interface of two-phase structure, and even the phenomenon of penetration and separation to the surface of the material will affect other aspects of the blend. Dielectric properties, as blending may result in reduced dielectric strength