Preparation method of medium-low voltage water tree resistant cable insulating material

A cable insulation and low voltage technology, which is applied in the field of preparation of medium and low voltage waterproof tree cable insulation materials, can solve the problems of reduced mechanical properties of the effective insulating layer, and achieve the effects of shortening the processing cycle, improving hydrophilicity, and good dispersibility

Pending Publication Date: 2022-01-28
南京雷泰克材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, based on the data of such methods, it will be found that the formation of water trees is basically suppressed from a single angle, and the effect is generally at the same time that it will bring about the reduction of the mechanical properties of the insulating layer.

Method used

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  • Preparation method of medium-low voltage water tree resistant cable insulating material
  • Preparation method of medium-low voltage water tree resistant cable insulating material
  • Preparation method of medium-low voltage water tree resistant cable insulating material

Examples

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preparation example Construction

[0015] In the embodiment of the present invention, a method for preparing medium and low voltage waterproof tree cable insulation materials includes the following steps: Step 1: configuring raw materials according to the mass fraction ratio, the raw materials are composed of A material and B material, and the A material includes 100 Parts of polyethylene, 15-27 parts of anti-water tree graft polymer, 5-20 parts of nano inorganic nucleating agent and 1.5-3 parts of carbon quantum dot nucleating agent, the B material includes 100 parts of poly Ethylene base resin, 0.5-5 parts of crosslinking agent and 0.5-3 parts of auxiliary crosslinking agent; step 2: nucleating polyethylene, anti-water tree graft polymer, nano inorganic nucleating agent and carbon quantum dots According to the metering ratio, blend at low speed in a high-speed mixer at room temperature for a certain period of time, then extrude and granulate material A with twin-screw at a certain temperature; step 3: mix poly...

Embodiment 1

[0020] A medium and low voltage waterproof tree cable insulation material, comprising the following raw materials in parts by weight:

[0021] Material A:

[0022]

[0023] Material B:

[0024] 100 parts of low-density polyethylene (LDPE);

[0025] 0.5 parts of dicumyl peroxide (DCP);

[0026] 0.5 part of vinyltriethoxysilane;

[0027] The weight ratio of material A and material B is 2:5.

[0028] The cable insulating material is obtained by melt-blending material A and material B at 60° C. with twin-screws, extruding and granulating.

Embodiment 2

[0030] A medium and low voltage waterproof tree cable insulation material, comprising the following raw materials in parts by weight:

[0031] Material A:

[0032]

[0033] Material B:

[0034]

[0035] The weight ratio of material A and material B is 2:5.

[0036] The cable insulating material is obtained by melt-blending material A and material B at 80°C with twin-screws, extruding and granulating.

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Abstract

The invention discloses a preparation method of a medium-low voltage water tree resistant cable insulating material, the medium-low voltage water tree resistant cable insulating material comprises the following components: a material A comprising polyethylene, a water tree resistant graft polymer, a nanoinorganic nucleating agent and a carbon quantum dot nucleating agent, and a material B comprising polyethylene base resin, a cross-linking agent and an assistant cross-linking agent. The beneficial effect of the method is to improve the hydrophilicity of the insulating material. The dispersion of water is improved, and the breakdown accident of the insulation material caused by the fact that a common cable insulation material easily generates water trees in the presence of water is solved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a method for preparing medium and low voltage waterproof tree cable insulation materials. Background technique [0002] The water tree phenomenon is a dendritic divergent insulation defect formed by micron-scale holes and nano-scale channels, which is the main cause of cable insulation aging and shortened life. Due to problems in cable installation, laying, and operation in the early days of our country, the operating environment of cables is not good, and moisture will gather in microscopic defects under the action of electric field to form water trees. It is easy to transform into an electric tree, which leads to direct breakdown of the insulation and causes a power outage. Therefore, suppressing the water tree phenomenon is a difficult problem and an inevitable trend for insulating materials. Generally speaking, there are three main ways to suppress water trees: (1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/06C08K3/04C08K3/36C08K3/22
CPCC08L51/06C08K2003/2227C08K2003/222C08K2003/2296C08L2203/202C08L2205/025C08L2205/03C08K3/04C08K3/36C08K3/22
Inventor 黄玉安高文通刘睿曹怡晨沐欣雨曹潇张波韩冰
Owner 南京雷泰克材料科技有限公司
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