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Halogen-free flame-retarded cross-linked polyethylene cable insulating material with low smoke

A cross-linked polyethylene, low-smoke flame retardant technology, which is applied to insulated conductors, insulated cables, organic insulators, etc. drip, improve processability, reduce heat transfer effect

Inactive Publication Date: 2015-04-01
GUIZHOU MINGHCOO WIRE & CABLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current PE polymer materials need to add 50-60% hydroxide inorganic flame retardants. A large amount of inorganic flame retardants will not only lead to a significant decline in the mechanical properties of the material, but also the melt will easily drip when the material is burned. In addition, a large amount of hydroxide will also bring about many defects such as reduced cable insulation performance, aggravated material aging, and poor processing fluidity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1. Formula: cross-linked polyethylene 100kg, magnesium hydroxide 20kg, aluminum hydroxide 7kg, tribasic lead sulfate 1.4kg, dibasic lead phosphite 0.7kg, paraffin 0.5kg, phthalate 30kg, nano-montmorillonite 10kg of soil.

[0014] To prepare, proceed as follows:

[0015] 1) Weigh raw materials according to the formula: cross-linked polyethylene, magnesium hydroxide, aluminum hydroxide, tribasic lead sulfate, dibasic lead phosphite, paraffin, phthalate and nano-montmorillonite, and Mix evenly to obtain a mixture;

[0016] 2) Put the above mixture into the screw extruder, melt and knead for 2 minutes, control the temperature of the screw extruder at 210-220°C, and the screw speed at 50 rpm;

[0017] 3) Extrude, cool, pelletize, and sieve according to the conventional process to obtain the material of the present invention.

Embodiment 2

[0018] Example 2. Formula: cross-linked polyethylene 80kg, magnesium hydroxide 10kg, aluminum hydroxide 5kg, tribasic lead sulfate 1kg, dibasic lead phosphite 0.5kg, paraffin 0.3kg, phthalate 20kg, nano-montmorillonite 5kg.

[0019] To prepare, proceed as follows:

[0020] 1) Weigh raw materials according to the formula: cross-linked polyethylene, magnesium hydroxide, aluminum hydroxide, tribasic lead sulfate, dibasic lead phosphite, paraffin, phthalate and nano-montmorillonite, and Mix evenly to obtain a mixture;

[0021] 2) Put the above compound into the screw extruder, melt and knead for 2 minutes, control the temperature of the screw extruder at 210-220°C, and the screw speed at 50 rpm;

[0022] 3) Extrude, cool, pelletize, and sieve according to the conventional process to obtain the material of the present invention.

Embodiment 3

[0023] Example 3. Formula: cross-linked polyethylene 150kg, magnesium hydroxide 30kg, aluminum hydroxide 9kg, tribasic lead sulfate 2kg, dibasic lead phosphite 0.9kg, paraffin 0.7kg, phthalate 50kg, nano-montmorillonite 15kg.

[0024] To prepare, proceed as follows:

[0025] 1) Weigh raw materials according to the formula: cross-linked polyethylene, magnesium hydroxide, aluminum hydroxide, tribasic lead sulfate, dibasic lead phosphite, paraffin, phthalate and nano-montmorillonite, and Mix evenly to obtain a mixture;

[0026] 2) Put the above mixture into the screw extruder, melt and knead for 5 minutes, control the temperature of the screw extruder at 210-220°C, and the screw speed at 70 rpm;

[0027] 3) Extrude, cool, pelletize, and sieve according to the conventional process to obtain the material of the present invention.

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PUM

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Abstract

The invention discloses a halogen-free flame-retarded cross-linked polyethylene cable insulating material with low smoke. The insulating material is prepared from the following raw materials in parts by weight: 80-150 parts of cross-linked polyethylene, 10-30 parts of magnesium hydroxide, 5-9 parts of aluminium hydroxide, 1-2 parts of lead sulfate tribasic, 0.5-0.9 part of dibasic lead phosphate, 0.3-0.7 part of paraffin, 20-50 parts of phthalate and 5-15 parts of nano-montmorillonite. The insulating material provided by the invention has the advantages of being light in weight, good in toughness, small in flame and low in burning speed, having no molten drop and less smoke, being anti-migration, good in char forming characteristics, easy in processing and the like.

Description

technical field [0001] The invention relates to a cable insulating material, in particular to a halogen-free low-smoke flame-retardant cross-linked polyethylene cable insulating material. Background technique [0002] Because polyvinyl chloride (PVC) produces a large amount of harmful gases such as dioxins and hydrogen halides when burned, its industrial application has been restricted in developed countries such as Europe, America, and Japan; polyethylene (PE) polymer materials that do not contain halogens Replacing PVC cable plastics with high energy consumption, high pollution and low electrical performance has become the main trend in the development of today's wire and cable industry. However, most of the current PE polymer materials need to add 50-60% hydroxide inorganic flame retardants. A large amount of inorganic flame retardants will not only lead to a significant decline in the mechanical properties of the material, but also the melt will easily drip when the mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06H01B3/44H01B7/295C08K13/02C08K3/22C08K3/30C08K3/32C08K5/12C08K3/34B29B9/06B29C47/92B29C48/92
CPCC08L23/06B29B9/06B29C48/92C08K2201/011C08L2201/02C08L2201/22C08L2203/202C08L91/06C08K13/02C08K2003/2224C08K2003/2227C08K2003/3045C08K3/32C08K3/346C08K5/12
Inventor 肖远勇
Owner GUIZHOU MINGHCOO WIRE & CABLE CO LTD
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