A low-smoke, halogen-free, flame-retardant and aging-resistant cable material for cables

Abstract

The invention relates to a low-smoke halogen-free flame-retardant anti-aging cable material for cables. The cable material is characterized in that the cable material comprises the following components in parts by weight: 20-50 parts of EPDM (ethylene-propylene-diene monomer), 50-80 parts of EVM (ethylene vinyl acetate rubber), 2.5-5 parts of a vulcanizing agent, 1.5-6 parts of a vulcanizing additive, 2-8 parts of an anti-aging agent, 10-30 parts of a plasticizer, 0.5-1.5 parts of a coupling agent, 15-30 parts of a reinforcing agent, 20-40 parts of a filling agent, and 50-70 parts of a flame retardant. According to the invention, because raw materials which do not produce dense smoke in the process of self burning, and do not produce dense smoke during chemical reactions thereof, and can absorb smoke are selected, the smoke density of cables in the process of burning is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of cable materials, and in particular relates to a low-smoke, halogen-free, flame-retardant and aging-resistant cable material for cables. Background technique [0002] Wires and cables are widely used in various fields as electric energy and information transmission bodies. Most wires and cables use plastic and rubber as insulation and sheath materials. Such polymer materials will produce flammable gases after being heated, melted and decomposed. At high temperature, these gases will react with oxygen and burn, which will generate a lot of heat, and the heat will promote the further melting, decomposition and continuous burning of the polymer, which will expand the fire and cause huge losses. my country's fire losses caused by cables alone are as high as several billion yuan every year. [0003] Therefore, as the flame retardant problem of wires and cables has attracted more and more attention, people hav...

AI Technical Summary

Problems solved by technology

[0007] Since EPDM rubber is non-polar, although it has excellent aging resistance, it swells greatly in non-polar oil and its mechanical properties change greatly.

EVM has excellent oil resistance due to the introduction of vinyl acetate groups, but its aging resistance is not ideal

At the same time, both EPDM and EVM are halogen-free, but they are flammable. Once a fire occurs, it will cause a lot of property damage and casualties

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