Semi-hard thermal shrinkage material and method for manufacturing integral semi-hard thermal shrinkage umbrella-skirt-shaped bushing for high-speed train roof cables by using same

Abstract

The invention relates to a semi-hard thermal shrinkable material and a method for manufacturing an integral semi-hard thermal shrinkable umbrella-skirt-shaped bushing for high-speed train roof cablesby using the same. The semi-hard thermal shrinkable material comprises the following materials: polyethylene, an ethylene vinyl acetate copolymer, ethylene-propylene-diene monomer rubber, silicone rubber, a filler, a lubricant, an antioxidant, a sensitizing crosslinking agent, a light stabilizer and a peroxide crosslinking agent. The method for manufacturing the integral semi-hard thermal shrinkable umbrella-skirt-shaped bushing for the high-speed train roof cables by using the semi-hard thermal shrinkable material comprises the steps of masterbatch processing, vulcanization and vacuum expansion. The advantages of a semi-hard material of a radiation cross-linking thermal shrinkable umbrella-skirt-shaped bushing and integral processing of a silicone rubber cold shrinkable bushing are combined, so the integral semi-hard thermal shrinkable umbrella-skirt-shaped bushing has good properties of thermal shrinkage, mechanical properties, electrical properties, flame retardancy, corrosion resistance, salt spray resistance and solvent resistance, meets the technical requirements of cable accessories for a high-speed train roof, and has better safety performance and stability. Therefore, theintegral semi-hard thermal shrinkable umbrella-skirt-shaped bushing has great practical and popularization values.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a high-speed train roof cable accessory material, which is a semi-hard heat-shrinkable material and a method for manufacturing an integral semi-hard heat-shrinkable shed shed sleeve for high-speed train roof cables. Background technique [0002] High-speed rail coaches are powered by electricity, which receives current through cables on the roof. The heat-shrinkable shed sleeve is applied to the installation of the roof cable to meet the needs of high-speed rail passenger cars (high-speed rail, bullet train, urban rail, subway) and other transportation equipment. There are two types of shed sleeves in the prior art, one is radiation cross-linked heat-shrinkable shed and sleeve, although the material is semi-hard, but due to the limitation of processing technology, it can only be a two-body structure of shed and sleeve , the installation mainly relies on hot melt adhesive for b...

AI Technical Summary

Problems solved by technology

There are two types of shed sleeves in the prior art, one is radiation cross-linked heat-shrinkable shed and sleeve, although the material is semi-hard, but due to the limitation of processing technology, it can only be a two-body structure of shed and sleeve , the installation mainly relies on hot melt adhesive for bonding, and the umbrella skirt is easy to fall off when the train is running at high speed; the other is the silicone rubber cold shrinkable umbrella skirt sleeve. Although the umbrella skirt and the sleeve are integrated, the material is soft and wear-resistant poor performance, easy to break, the above two can not well meet the actual needs of high-speed train operation