Composite weather-resistant insulated electric wire

By employing a multi-strand tinned copper wire stranded structure, cross-linked polyethylene and polytetrafluoroethylene insulation layers, and a ceramic fiber and expanded graphite heat dissipation buffer layer in the wire, and by preparing cyanolignin and polyvinyl chloride sheath material through the Mannich reaction, the problem of easy aging of the polyvinyl chloride sheath layer is solved, and the resistance to ultraviolet aging and mechanical properties of the wire are significantly improved.

CN122136065APending Publication Date: 2026-06-02重庆科宝电缆股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
重庆科宝电缆股份有限公司
Filing Date
2026-04-07
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Polyvinyl chloride (PVC) sheathing is prone to aging and cracking when used outdoors, which reduces the lifespan of the wire. In existing technologies, lignin has poor compatibility with PVC, which affects mechanical properties.

Method used

The conductor core is made of multi-strand tin-plated copper wire, the insulation layer is made of cross-linked polyethylene and polytetrafluoroethylene, and the heat dissipation buffer layer is combined with ceramic fiber and expanded graphite. The sheath material is made of cyanolignin and polyvinyl chloride through Mannich reaction to improve compatibility and UV resistance.

Benefits of technology

It improves the wire's resistance to ultraviolet aging, enhances the tensile strength and elongation at break of the sheath material, improves heat resistance and ultraviolet absorption capacity, and extends the service life of the wire.

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Abstract

This invention relates to the field of cable technology and discloses a composite insulated weather-resistant wire. The composite insulated weather-resistant wire of this invention is composed of a conductor core, a first insulation layer, a heat dissipation buffer layer, a second insulation layer, and a polyvinyl chloride (PVC) sheath material. The PVC sheath material includes 100 parts by weight of PVC, 35-50 parts by weight of plasticizer, 3-12 parts by weight of cyanolignin, and 5-20 parts by weight of filler, etc. The cyanolignin contains a large number of phenolic hydroxyl groups, which can capture oxygen free radicals, hydroxyl free radicals, etc. generated by the photo-oxidation free radical chain reaction, thereby terminating the photo-oxidation process and exhibiting excellent UV resistance. At the same time, the lignin introduces cyano groups, which can absorb ultraviolet light energy, transition from the ground state to the excited state, and return to the ground state, releasing energy. It also has excellent ultraviolet absorption performance. Under the synergistic effect, the UV aging resistance of PVC is significantly improved.
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