Low-smoke, halogen-free, flame-retarding and fireproof polyolefin insulated cable and preparation method thereof

Abstract

The invention discloses a low-smoke, halogen-free, flame-retarding and fireproof polyolefin insulated cable and a preparation method thereof. According to the key point of the technical scheme, the low-smoke, halogen-free, flame-retarding and fireproof polyolefin insulated cable comprises insulated wire core groups, fireproof layers, an insulating layer, an oxygen separation layer and a protecting jacket layer in sequence from interior to exterior, wherein the fireproof layer is prepared from the following components in parts by weight: 5 to 15 parts of mineral flame retardant, 50 to 70 parts of polyethylene resin and/or polyvinyl chloride resin, 5 to 15 parts of glass fiber, 5 to 15 parts of polysulfonamide fiber, 5 to 10 parts of melamine amide-inorganic montmorillonite, 10 to 35 parts of polyorganosiloxane, 0.5 to 5 parts of solubilizer and 0.5 to 5 parts of microcapsule pigment; the insulating layer is prepared from the following components in parts by weight: 50 to 70 parts of polyethylene resin and/or polyvinyl chloride resin, 5 to 15 parts of Kevlar fiber and 5 to 15 parts of mineral flame-retarding filling. The exteriors of insulated wire cores are cladded with the fireproof layers, the insulating layer, the oxygen separation layer and the protecting jacket layer; the structure with sequential distribution can be used for decelerating the spreading speed of a fire behavior in the condition that the cable is on fire.

Description

technical field [0001] The invention relates to the field of cables, in particular to a low-smoke, halogen-free, flame-retardant, fire-resistant polyolefin insulated cable and a preparation method thereof. Background technique [0002] With the rapid development of the national economy, the amount and scope of use of wires and cables are getting bigger and bigger. In recent years, industries such as power plants, substations, smelting and petrochemical industries have a great demand for control cables. In use, it is necessary not only to avoid mechanical damage, insulation damage, insulation aging and deterioration of the control cable, but also to use it under high temperature conditions, that is, high temperature resistance. [0003] The insulating layer and the sheath layer of the existing flame-retardant cables are generally made by mixing a single flame retardant with the cable material. Due to the single flame retardant material, the cable will not only produce a lot...

AI Technical Summary

Problems solved by technology

Due to the single flame retardant material, the cable will not only produce a lot of smoke and toxic gas during use, but also reduce the performance of the cable due to dehydration reaction, thus affecting the flame retardant temperature and flame retardant time of the cable, and the flame retardant effect is poor

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