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Composite fire-resistant fireproof cable and preparation method thereof

A fire-resistant cable and fire-resistant technology, which is used in cable/conductor manufacturing, insulated cables, cables, etc., can solve problems such as cable cracking and uneven performance of fire-resistant cable products.

Active Publication Date: 2021-06-04
湖南至和电缆科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the safety level of electrical circuits and reduce the occurrence and loss of electrical fire accidents, the demand for flame-retardant and fire-resistant cables and cables in my country and other countries in the world is increasing year by year, especially the demand for fire-resistant cables is increasing day by day. At present, the performance of fireproof cable products on the market varies. Many fireproof cables use metal oxide particles as the fireproof layer or heat-resistant layer, which is prone to cracking when the cable is bent. Therefore, the development of higher-performance high-temperature-resistant fireproof cables is imminent.

Method used

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  • Composite fire-resistant fireproof cable and preparation method thereof
  • Composite fire-resistant fireproof cable and preparation method thereof
  • Composite fire-resistant fireproof cable and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A composite fire-resistant type fireproof cable, including an outer sheath, the outer sheath is made of polyolefin composite insulating material;

[0038] The preparation method of polyolefin composite insulating material is as follows:

[0039]After impregnating nano-magnesia with KH-550 silane coupling agent 20 times its mass, oven-dried at 65°C to obtain modified nano-magnesia, and then mixed with low-density polyethylene, metallocene polyolefin elastomer, peroxide The cross-linking agent is blended together, and the weight ratio of modified nano-magnesia, low-density polyethylene, and metallocene polyolefin elastomer is 1:4:1, and they are added to a twin-screw extruder to extrude and granulate. The working temperature of the extruder is 135°C. Finally, the polyolefin composite insulating material can be obtained through air cooling, screening, magnetic separation and metering.

[0040] Steel tape armor layer;

[0041] Flame retardant interlayer;

[0042] The fla...

Embodiment 2

[0060] A composite fire-resistant type fireproof cable, including an outer sheath, the outer sheath is made of polyolefin composite insulating material;

[0061] The preparation method of polyolefin composite insulating material is as follows:

[0062] After impregnating nano-magnesia with KH-550 silane coupling agent 20 times its mass, oven-dried at 60°C to obtain modified nano-magnesia, and then mixed with low-density polyethylene, metallocene polyolefin elastomer, peroxide The cross-linking agent is blended together, and the weight ratio of modified nano-magnesia, low-density polyethylene, and metallocene polyolefin elastomer is 1:2:1, and they are added to a twin-screw extruder to extrude and granulate, and the twin-screw The working temperature of the extruder is 130°C. Finally, the polyolefin composite insulating material can be obtained through air cooling, screening, magnetic separation and metering.

[0063] Steel tape armor layer;

[0064] Flame retardant interlaye...

Embodiment 3

[0083] A composite fire-resistant type fireproof cable, including an outer sheath, the outer sheath is made of polyolefin composite insulating material;

[0084] The preparation method of polyolefin composite insulating material is as follows:

[0085] After impregnating nano-magnesia with KH-550 silane coupling agent 20 times its mass, oven-dried at 60°C to obtain modified nano-magnesia, and then mixed with low-density polyethylene, metallocene polyolefin elastomer, peroxide The cross-linking agent is blended together, and the weight ratio of modified nano-magnesia, low-density polyethylene, and metallocene polyolefin elastomer is 1:2:1, and they are added to a twin-screw extruder to extrude and granulate, and the twin-screw The working temperature of the extruder is 130°C. Finally, the polyolefin composite insulating material can be obtained through air cooling, screening, magnetic separation and metering.

[0086] Steel tape armor layer;

[0087] Flame retardant interlaye...

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Abstract

The invention relates to the technical field of fireproof cables, in particular to a composite fire-resistant fireproof cable and a preparation method thereof. The composite fire-resistant fireproof cable comprises an outer sheath, a steel tape armor layer, a flame-retardant interlayer, a fireproof layer and a cable core, the cable core is formed by twisting three wires, and each wire comprises a conductor, a ceramic silicone rubber insulating layer and a metal wire braid layer from inside to outside; each conductor is formed by twisting a plurality of copper guide wires; the fireproof layer is prepared by filling a silicone rubber material with polytetrafluoroethylene fine powder, and the polytetrafluoroethylene is obtained by irradiation cracking and ultramicro airflow crushing; and the insulating sheath is made of a silicon rubber material. According to the fireproof cable disclosed by the invention, normal electrification of a line within a certain time can still be ensured at a certain flame temperature, and the fireproof cable has excellent high-temperature-resistant fireproof performance.

Description

technical field [0001] The invention relates to the technical field of fireproof cables, in particular to a composite fireproof fireproof cable and a preparation method thereof. Background technique [0002] Modern office buildings, hotels, restaurants, railway stations and other important public places are more and more luxuriously decorated, and more and more combustible materials are used; major and medium-sized cities in the country have built subway lines one after another, and these important public places require fire protection in case of fire. Under certain conditions, the wires can normally and continuously transmit electricity, transmit various control signals and alarm signals to provide valuable time for people's escape, automatic alarm, start-up of fire-fighting facilities, rescue and use of emergency equipment, and fire-resistant cables can be used in fire When it occurs, ensure that the line is normally energized and transmits various control signals and alar...

Claims

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Application Information

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IPC IPC(8): H01B7/00H01B7/18H01B7/29H01B7/295H01B13/00
CPCH01B7/0045H01B7/18H01B7/1875H01B7/292H01B7/295H01B13/00
Inventor 龙海军刘有情
Owner 湖南至和电缆科技有限公司
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