Halogen-free flame-proof cable sheath material

A flame-retardant cable and sheath material technology, applied in the direction of insulating cables, cables, circuits, etc., can solve environmental pollution and other problems, achieve low smoke release, inhibit thermal degradation or thermal degradation, and low heat release rate

Inactive Publication Date: 2007-08-08
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the presence of red phosphorus, it causes certain pollution to the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Adopt the ethylene-octene copolymer of 50 parts by weight (octene content is 18%), the ethylene-vinyl acetate copolymer of 20 parts (vinyl acetate content is 28%), the low density polyethylene of 30 parts, 90 parts Magnesium hydroxide, 10 parts of expandable graphite flame retardant synergist (its expansion rate is 250 times, particle size is 300 microns, carbon content is 95%), and 5 parts of organically modified montmorillonite (interlayer spacing is 2.8nm), the materials were mixed evenly on a two-roll mill, the temperature of the rollers was 150°C, and the mixing time was 30min. Then press the tablet on a flat vulcanizing machine at 160°C, cold press, and release the mold to make a sample with a thickness of 2mm, and test the mechanical properties of the composite material according to the national standard GB / T1040-92, where the tensile strength and elongation at break are respectively It is 11.1MPa and 278%. The horizontal-vertical combustion test is carried out i...

Embodiment 2

[0047]Adopt the ethylene-octene copolymer of weight 60 parts (octene content is 18%), the ethylene-vinyl acetate copolymer of 20 parts (vinyl acetate content is 28%), the low density polyethylene of 20 parts, 90 parts Magnesium hydroxide, 10 parts of expandable graphite flame retardant synergist (its expansion rate is 250 times, particle size is 300 microns, carbon content is 95%), and 5 parts of organically modified montmorillonite (interlayer spacing is 2.8nm), the materials were mixed evenly on a two-roll mill, the temperature of the rollers was 150°C, and the mixing time was 30min. Then press the tablet on a flat vulcanizing machine at 160°C, cold press, and release the mold to make a sample with a thickness of 2mm, and test the mechanical properties of the composite material according to the national standard GB / T1040-92. Among them, the tensile strength and elongation at break are respectively It is 12.3MPa and 160%. The horizontal-vertical combustion test is carried out...

Embodiment 3

[0049] Adopt the ethylene-octene copolymer of weight 70 parts (octene content is 18%), the ethylene-vinyl acetate copolymer of 20 parts (vinyl acetate content is 28%), the low density polyethylene of 10 parts, 90 parts Magnesium hydroxide, 10 parts of expandable graphite flame retardant synergist (its expansion rate is 250 times, particle size is 300 microns, carbon content is 95%), and 5 parts of organically modified montmorillonite (interlayer spacing is 2.8nm), the materials were mixed evenly on a two-roll mill, the temperature of the rollers was 150°C, and the mixing time was 30min. Then press the tablet on a flat vulcanizing machine at 160°C, cold press, and release the mold to make a sample with a thickness of 2mm, and test the mechanical properties of the composite material according to the national standard GB / T1040-92. Among them, the tensile strength and elongation at break are respectively It is 11.6MPa and 151%. The horizontal-vertical combustion test is carried ou...

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PUM

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Abstract

The invention discloses a non-halogen flameproof cable jacket material formula without harming environment, which is characterized by the following: adopting ethylene-octaolefin copolymer, low-density polyethylene, ethylene-vinyl acetate copolymer as basic resin; making magnesium hydroxide as flameproof agent; using bulking graphite and organic montmorillonite as flame-proof assisting agent; adding lubricant and anti-oxidant to form the formula of cable jacket; improving extending strength to 10-14Mpa and fracture extending rate at 150-350%.

Description

technical field [0001] The invention relates to a flame-retardant cable sheath material mixture with polyolefin as a matrix resin, in particular to a formulation of a halogen-free flame-retardant cable sheath material. Background technique [0002] With the enhancement of people's awareness of environmental protection and the promulgation of corresponding environmental regulations, the halogen-free flame-retardant technology of polymer materials with non-toxicity, low smoke, and no corrosive gas is being replaced by halogen-free flame-retardant technology, and has become a flame-retardant polymer material. The mainstream direction of research and development. For a long time, polyvinyl chloride (PVC) plastics accounted for nearly 80% of wire and cable materials. On the one hand, PVC cable materials contain heavy metal harmful elements such as lead, barium, and tin. During use, the harmful elements gradually dissolve and flow into rivers and soil to cause environmental pollu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08K9/04H01B3/44H01B7/295C08K3/04C08K3/22C08K3/34
Inventor 张立群李红霞黄宏海梁文利胡伟康
Owner BEIJING UNIV OF CHEM TECH
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