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 occurs within a short period of time, especially for steel tape armored cables with large outer diameters. Seriously affected the service life of the cable, and also caused great losses to the cable manufacturer

Images