Halogen-containing flame-retardant polyethylene sheath material

A flame retardant polyethylene and sheathing material technology, applied in the field of sheathing materials, can solve problems such as poor resistance to environmental stress cracking, achieve excellent dielectric properties, good flexibility, and improve flame retardant properties.

Inactive Publication Date: 2019-01-01
JIANGSU DONGFANG CABLE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition to mechanical properties, its environmental stress cracking resistance is particularly affected. Since the ultra-high voltage cable sheath needs to ensure a certain hardness and mechanical properties, more high-density polyethylene resin must be added to the formula, and the high-density polyethylene resin Environmental stress cracking resistance is poor, especially after absorbing a large amount of flame retardants, this performance is even worse

Method used

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  • Halogen-containing flame-retardant polyethylene sheath material
  • Halogen-containing flame-retardant polyethylene sheath material
  • Halogen-containing flame-retardant polyethylene sheath material

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Embodiment approach

[0034] As an embodiment of the present invention, the raw materials for the preparation of the halogenated flame-retardant polyethylene sheathing material further include modified polyacrylic acid and nano inorganic substances.

[0035] Polyethylene blend

[0036] In the present invention, the polyethylene-based mixture refers to a mixture of polyethylene and modified polyethylene.

[0037] Polyethylene: In the present invention, the polyethylene refers to a mixture of ultra-high molecular weight polyethylene, medium-density polyethylene and low-density polyethylene.

[0038] As an embodiment of the present invention, the ultra-high molecular weight polyethylene is branched ultra-high molecular weight polyethylene.

[0039] In the present invention, the preparation method of the ultra-high molecular weight polyethylene is as follows:

[0040] 1. In a 0.5L stainless steel stirred polymerization kettle, replace it with nitrogen three times and twice with ethylene, add 180mL ...

Embodiment approach 1

[0100] Embodiment 1. Halogenated flame-retardant polyethylene sheath material, the preparation raw materials of said halogenated flame-retardant polyethylene sheath material at least include:

[0101] Polyethylene-based compounds, antioxidants, inorganic flame retardants, halogenated flame retardants, lubricants and masterbatches.

Embodiment approach 2

[0102] Embodiment 2. The halogenated flame-retardant polyethylene sheath material described in Embodiment 1, by weight, the preparation raw materials of the halogenated flame-retardant polyethylene sheath material at least include:

[0103] 40-60 parts of polyethylene mixture, 0.1-3 parts of antioxidant, 25-40 parts of inorganic flame retardant, 10-20 parts of halogenated flame retardant, 0.1-2 parts of lubricant and 5-20 parts of color masterbatch.

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Abstract

The invention provides a halogen-containing flame-retardant polyethylene sheath material. The halogen-containing flame-retardant polyethylene sheath material at least comprises following raw materials: a polyethylene mixture, an anti-oxidant, an inorganic fire retardant, a halogen-containing fire retardant, a lubricant, and a color master batch. The halogen-containing flame-retardant polyethylenesheath material possesses excellent dielectric properties, low temperature resistance, and stress cracking resistance; high voltage cables prepared from the halogen-containing flame-retardant polyethylene sheath material possess excellent flexibility, flame resistance is capable of reaching standards of bunched cable combustion test, and the grade is determined to be B based on that the combustionlength in 40min is 31.8m.

Description

technical field [0001] The invention relates to the technical field of sheathing materials, more specifically, the invention relates to a halogenated flame-retardant polyethylene sheathing material and a preparation method thereof. Background technique [0002] With the improvement of environmental protection and safety awareness in countries all over the world, flame-retardant and environmentally friendly cable materials have been widely used and have great development potential. Flame-retardant polyethylene is widely used in the field of flame-retardant cables because of its light weight, good mechanical properties, very good low temperature resistance, good environmental stress cracking resistance, good processability, and excellent electrical insulation properties. Has a very wide range of applications. [0003] Plastics for wire and cable insulation and sheathing are commonly known as cable materials, including rubber, polyvinyl chloride, polyethylene, polyolefin, nylo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/06C08L23/06C08K13/02C08K5/02C08K3/22C08K3/02H01B3/44
CPCC08K2003/026C08K2003/2224C08K2003/2296C08L51/06C08L2201/02C08L2203/202C08L2205/025C08L2205/035C08L2207/066C08L2207/068H01B3/441C08L23/06C08K13/02C08K5/02C08K3/22C08K3/2279C08K3/02
Inventor 曹华杨震卞祖宏
Owner JIANGSU DONGFANG CABLE MATERIAL
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