Processing technology for embedded type glass-fiber-woven flame-retardant cotton-covered wire

Abstract

The invention proposes an embedded glass fiber braided flame-retardant cloth electric wire processing technology, comprising the following steps: A), extruding an insulating layer outside the conductor; B), weaving a glass fiber layer outside the insulation layer; C), wrapping the glass fiber Low-smoke, halogen-free and flame-retardant polyolefin is extruded on the layer to form a glass fiber embedded layer. The invention is convenient to manufacture, and effectively improves the waterproof and fireproof effect of the cable.

Description

technical field [0001] The invention relates to the technical field of electric wires and cables, in particular to an electric wire processing technology of embedded glass fiber braided flame-retardant cloth. Background technique [0002] In the prior art, polyvinyl chloride is generally used as insulation for wiring wires. Due to its structural characteristics and the limitation of the flame retardant performance of insulating materials, the bundled wires can only pass the GB / T18380B class, but cannot pass the GB31247B class. 1 class. When a fire breaks out, once the wires laid in bundles burn, the burning distance will be long, and the burning will generate a lot of heat and smoke, which will aggravate the fire hazard and make it difficult to fight for a longer time for escape and rescue. The low-smoke, halogen-free polyolefin insulated wire uses low-smoke, halogen-free polyolefin as insulation, which solves the problem of too much smoke when it catches fire, but the fla...

AI Technical Summary

Problems solved by technology

Due to its structural characteristics and the limitation of the flame retardant performance of insulating materials, the bundled wires can only pass the GB / T18380B class, but cannot pass the GB31247B class. 1 class

In the event of a fire, once the wires laid in bundles burn, the burning distance will be long, and the combustion will generate a lot of heat and smoke, which will aggravate the fire hazard and make it difficult to fight for a longer time for escape and rescue.

The low-smoke, halogen-free polyolefin insulated wire uses low-smoke, halogen-free polyolefin as insulation, which solves the problem of too much smoke when it catches fire, but the flame retardant effect can only pass GB / T18380B, but cannot pass GB31247B 1 class

At the same time, a large amount of magnesium hydroxide and aluminum hydroxide flame retardants are added to the low-smoke and halogen-free polyolefin material, the fastness of the polymer chains becomes poor, the gap between the polymer chains becomes larger, and the mechanical properties of the material are greatly reduced (tensile strength) Only 10MPa), the water permeability is greatly increased, and the insulation resistance of the wire is about two orders of magnitude lower than that of the PVC wire after being immersed in water.

Moreover, the heat dissipation performance of the existing wires is poor, and it is not easy to fix when multiple wires are put together

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