Halogen-free flame-retardant cable sheath material for railway locomotive and manufacturing method for halogen-free flame-retardant cable sheath material

Abstract

The invention discloses a halogen-free flame-retardant cable sheath material for a railway locomotive and a manufacturing method for the halogen-free flame-retardant cable sheath material. The halogen-free flame-retardant cable sheath material comprises 100 weight parts of rubber, 100 to 180 weight parts of metal hydroxide serving as a flame retardant, 0 to 60 weight parts of carbon black or white carbon black serving as a reinforcing agent, 0.5 to 5 weight parts of silane coupling agent, 5 to 30 weight parts of plasticizer, 1 to 5 weight parts of crosslinking agent and 1 to 5 weight parts of crosslinking aid. The halogen-free flame-retardant cable sheath material is prepared by a blending technology. The sheath material has excellent flame retardancy, oil resistance and low-temperature resistance, is suitable for cable sheaths of railway locomotives, and can meet the requirement of halogen-free flame-retardant cables for locomotives.

Description

field of invention [0001] The invention relates to a halogen-free flame-retardant cable sheath material for railway locomotives and a preparation method thereof. Background technique [0002] Halogen-containing wires and cables will emit a large amount of dense smoke and corrosive halides when burned, causing casualties and corroding various equipment, which is the so-called "secondary disaster". With the development of the world economy and the continuous enhancement of environmental awareness in various countries, the development of low-smoke, halogen-free and flame-retardant cable materials has developed rapidly. At the same time, low-smoke, flame-retardant cables will also be an important direction for the development of flame-retardant cables in the future. [0003] At present, low-smoke and halogen-free locomotive cable sheath materials are usually based on halogen-free crystalline polyolefin resin or thermoplastic elastomer and other polymers, mixed with a large amoun...

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Problems solved by technology

[0005] The patent with the application number CN201010167232.8 discloses a method of containing vinyl acetate and crosslinking ethylene-vinyl acetate copolymer silane, but none of the published patents mentions the simultaneous improvement of low temperature performance and polar oil resistance Satisfied sheath material composition

[0006] However, railway locomotive cables are generally used under extremely harsh conditions. Adding a large amount of flame retardants will not only meet the required flame retardancy and thermal stability, but will inevitably greatly deteriorate the mechanical properties and oil resistance. The polar rubber can meet the oil resistance requirements in the prior art, but it will make the low temperature performance worse

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