Thermoplastic low-smoke halogen-free flame-retardant environment-friendly sheath material for power cables and preparation method thereof

Abstract

The invention discloses a thermoplastic low-smoke halogen-free flame-retardant environment-friendly sheath material for power cables and a preparation method thereof. The thermoplastic low-smoke halogen-free flame-retardant environment-friendly sheath material for power cables comprises the following components in parts by weight: 60-80 parts of EVA (ethylene-vinyl acetate), 20-30 parts of HDPE (high-density polyethylene), 10-15 parts of EPDM (ethylene-propylene-diene monomer), 15-25 parts of compatiblizing agent, 100-150 parts of halogen-free flame retardant, 0.5-1 part of antioxidant 1035, 0.5-1 part of antioxidant DSTP, 1-2 parts of ethylene bis stearamide, 3-5 parts of DCP (dicumyl peroxide), 2-4 parts of zinc oxide, 1-2 parts of calcium stearate, 10-20 parts of dimethyl methyl phosphonate, 30-40 parts of nano kaolin, 2-3 parts of stearic acid and 0.5-1 part of isopropyl tri(dioctylpyrophosphate)titanate. The sheath material disclosed by the invention has the advantages of excellent physical and mechanical properties, excellent flame retardancy, favorable high / low temperature resistance, favorable oil resistance, favorable solvent resistance, favorable wear resistance, favorable ozone resistance, favorable aging resistance, high flexibility, crack resistance and the like, is very durable, environment-friendly and pollution-free, and can completely satisfy the requirements for modern power cables.

Description

technical field [0001] The invention relates to a sheathing material for power cables, in particular to a thermoplastic low-smoke, halogen-free, flame-retardant and environment-friendly sheathing material for power cables and a preparation method thereof. Background technique [0002] At present, with the introduction of EU ROHS and REACH environmental protection regulations and the needs of public safety, low-smoke halogen-free flame-retardant polyolefin materials have replaced PVC in the field of cables and are widely used in high-speed railways, urban rail transit and automobiles, ships, Nuclear power plants, high-rise buildings, optical communications, mobile communication base stations and other fields. [0003] Low-smoke halogen-free flame-retardant polyolefin cable sheathing material is an environmentally friendly product. The development of such high-performance flame-retardant materials is an important topic and a difficulty in flame-retardant technology, because th...

AI Technical Summary

Problems solved by technology

[0003] Low-smoke halogen-free flame-retardant polyolefin cable sheathing material is an environmentally friendly product. The development of such high-performance flame-retardant materials is an important topic and a difficulty in flame-retardant technology, because the flame-retardant system generally uses hydrated inorganic fillers As a flame retardant, although this type of flame retardant is non-toxic and low-smoke, its flame-retardant efficiency is low, and a large filling amount is required to achieve high flame-retardant performance, which will cause a decrease in the mechanical properties and processing properties of the material. In particular, the impact on the latter is more serious

As a high-fill low-smoke halogen-free flame-retardant polyolefin material, it is easy to crack, which is a fatal defect of cable products, which seriously affects the service life of cables and causes great losses to cable manufacturers.