Low smoke zero halogen flame retardant power cable

By using a combination of thermoplastic elastomer materials and flame retardants in the cable sheath layer, the problem of insufficient flame retardant performance of polyurethane elastomer cables is solved, achieving efficient low-smoke halogen-free flame retardant effect and improved mechanical strength.

CN122117550APending Publication Date: 2026-05-29TIANLONG WEIYE CABLE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANLONG WEIYE CABLE CO LTD
Filing Date
2026-04-10
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In the existing technology, the flame retardant properties of cable sheaths containing polyurethane elastomers are poor, and the addition of large amounts of flame retardants will lead to a decrease in mechanical strength.

Method used

The sheath layer is prepared using thermoplastic elastomer materials, including polyurethane elastomer, styrene-isoprene-styrene block copolymer and calcium molybdate, through blending and extrusion processes. Combined with hydroxide and phosphorus-based flame retardants, the filler treatment is optimized to improve dispersibility and mechanical strength.

Benefits of technology

Without adding large amounts of flame retardants, the flame retardant properties and mechanical strength of the cable sheath are significantly improved, and the molten dripping and smoke generation during combustion are reduced.

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Abstract

The application relates to the cable technical field and discloses a low-smoke halogen-free flame-retardant power cable which comprises, from inside to outside, a conductor, an insulation layer, a wrapping layer and a sheath layer; the raw material of the sheath layer comprises the following components in parts by weight: 100 parts of polyethylene, 15-20 parts of ethylene-vinyl acetate copolymer, 10-15 parts of thermoplastic elastomer material, 10-15 parts of filler, 10-12 parts of first compatilizer and 20-30 parts of flame retardant; and the raw material of the thermoplastic elastomer material comprises the following components in parts by weight: 30 parts of polyurethane elastomer, 8-15 parts of styrene-isoprene-styrene block copolymer, 4-8 parts of calcium molybdate and 5-7 parts of second compatilizer. Through the technical scheme, the problem that the flame-retardant performance of the sheath layer of the power cable containing the polyurethane elastomer is poor in the related art is solved.
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