Anti-cracking low-smoke halogen-free flame retardant polyolefin protecting bush material and preparation method thereof

Abstract

The invention provides an anti-cracking low-smoke halogen-free flame retardant polyolefin protecting bush material and a preparation method thereof. The protecting bush material is composed of the following components in parts by weight: 40-50 parts of ethylene-vinyl acetate copolymer resin, 30-50 parts of polyolefin elastic body resin, 10-20 parts of polyethylene resin, 10-20 parts of functionalized polyethylene resin, 180-200 parts of hydroxide fire retardant, 0.5 part of primary antioxidant, 0.5 part of auxiliary antioxidant and 3-5 parts of lubricating agent. The preparation method comprises the following steps of: metering raw materials in a raw material formula according to respective weight part and conveying the raw materials into a kneading machine to be uniformly mixed; conveying the mixed materials into a single screw extruder to extrude and particles; then, vibrating by a vibrating sieve; and finally, packaging and cooling to finish the whole preparation process. According to the anti-cracking low-smoke halogen-free flame retardant polyolefin protecting bush material and the preparation method thereof, disclosed by the invention, standard requirements are completely met; ethylene copolymer resin is used the basic raw material, the polyolefin elastic body resin, a compatilizer and the hydroxide fire retardant are added to be commixed to form the anti-cracking low-smoke halogen-free flame retardant polyolefin protecting bush material.

Description

1. Technical field [0001] The invention relates to a wire and cable material and a preparation method thereof, in particular to an anti-cracking low-smoke halogen-free flame-retardant polyolefin sheath material for wires and cables and a preparation method thereof. 2. Background technology [0002] At present, with the introduction of EU ROHS and REACH environmental protection regulations and the needs of public safety, low-smoke, halogen-free and 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] At present, low-smoke, halogen-free and flame-retardant polyolefin sheath materials generally have the following disadvantages: when used outdoors, axial annular cracking of the sheath often occurs within a short period of time, especially for...

AI Technical Summary

Problems solved by technology

[0003] At present, low-smoke, halogen-free and flame-retardant polyolefin sheath materials generally have the following disadvantages: when used outdoors, axial annular cracking of the sheath often occu...

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