Low-smoke and halogen-free insulated cable

Abstract

The invention provides a low-smoke and halogen-free insulated cable. The low-smoke and halogen-free insulated cable sequentially comprises a plurality of cable cores, a flexible filling layer, a supporting layer, a heat insulation tape, a shielding tape, a flame-retardant layer and a low-smoke and halogen-free insulating sleeve from inside to outside. The wire cores are uniformly accommodated in the flexible filling layer. A toughness increasing agent is arranged in the flexible filling layer, and the supporting layer is arranged on the flexible filling layer. The flexible filling layer is contained in the heat insulation tape. The shielding tape is arranged on the heat insulation tape through a sealant. The shielding tape is accommodated in the flame-retardant layer, and the flame-retardant layer is provided with fire extinguishing powder in each fire extinguishing cavity. The flame-retardant layer is accommodated in the low-smoke and halogen-free insulating sleeve. Each cable core sequentially comprises a plurality of conductive wires, a soft flame-retardant isolation tape and a fireproof layer from inside to outside. The surface layer of each conductive wire is provided with a flame retardant, and each conductive wire is formed by twisting and is accommodated in the soft flame-retardant isolation tape. The waterproof layer is arranged on the surface layer of the soft flame-retardant isolation tape. The low-smoke and halogen-free insulating sleeve can ensure that the low-smoke and halogen-free insulated cable generates little smoke after combustion.

Description

technical field [0001] The invention relates to the field of cables, in particular to a low-smoke halogen-free insulated cable. Background technique [0002] Low-smoke and halogen-free is the material classification of wire sheaths in the wire and cable industry. Low-smoke halogen-free wire sheath is composed of thermoplastic or thermosetting material with low smoke emission when heated and halogen-free itself. Most network cable coverings are composed of polyethylene, polyvinyl chloride or thermoplastic polyurethane. Chlorine-containing plastics will release toxic hydrogen chloride in case of fire, and produce hydrochloric acid in case of contact with water. The low-smoke and halogen-free materials will not release hydrogen halide or other acids when they are on fire. Low-smoke and halogen-free materials reduce the generation of toxic and corrosive gases when they burn. Low-smoke and halogen-free materials are often used in poorly ventilated environments such as airplan...

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a low-smoke and halogen-free insulated cable for the technical problems that the traditional low-smoke and halogen-free cables have poor structural strength and cannot meet the needs of specific environments.

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