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Water-tree-resistant crosslinked polyethylene insulating material

A cross-linked polyethylene, anti-water tree technology, applied in the direction of plastic/resin/wax insulators, insulators, organic insulators, etc., can solve the problems of non-self-recoverable insulation of cable insulation, economic loss and social impact, and achieve good compatibility Sexuality, significant effect, and improved service life

Pending Publication Date: 2020-12-04
NANJING ZHONGCHAO NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In order to meet the needs of economic development for electricity consumption and solve the growing grid load problem, it is necessary to strengthen the construction of cable lines, but it is often necessary to consider many factors such as line direction, electromagnetic environment, and urban planning; XLPE cables are characterized by their It is widely used in the power system due to its advantages of less land occupation and convenient construction; high-voltage cable lines are responsible for important power transmission tasks in the urban network, and the cable insulation cannot be self-recovering. Once an accident occurs due to internal defects, the current traffic Polyethylene cables have the problem of "water trees", that is, the quality is reduced due to the penetration of external moisture into the insulating medium, which will cause serious economic losses and social impacts. Therefore, research on water-tree-resistant XLPE insulation materials and its important

Method used

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  • Water-tree-resistant crosslinked polyethylene insulating material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: A water-tree-resistant cross-linked polyethylene insulating material is made of the following raw materials in parts by weight, wherein: 80 parts of low-density polyethylene, 6 parts of water-tree-resistant masterbatch, 0.7 parts of antioxidant, cross-linked 2.2 parts of linking agent, 0.8 parts of co-crosslinking agent, 2 parts of compatibilizer.

[0015] In this embodiment, the melt flow index of the low-density polyethylene is 1.9 g / 10 min.

[0016] In this example, the anti-water tree masterbatch is composed of sorbitol and ethylene-acrylic acid copolymer, wherein the mass ratio of sorbitol to ethylene-acrylic acid copolymer is 1:1.2.

[0017] In this embodiment, the antioxidant is a mixture of antioxidant 300, antioxidant DSTP, and antioxidant DLTP, wherein the mass ratio of antioxidant 300, antioxidant DSTP, and antioxidant DLTP is 1:0.7:0.7.

[0018] In this embodiment, the crosslinking agent is dicumyl peroxide.

[0019] In this embodiment, the c...

Embodiment 2

[0022] Embodiment 2: basically the same as Embodiment 1, the difference is that: a water-tree-resistant cross-linked polyethylene insulating material is made of the following raw materials in parts by weight, wherein: 110 parts of low-density polyethylene, water-resistant 8 parts of tree masterbatch, 0.9 parts of antioxidant, 2.8 parts of crosslinking agent, 1 part of co-crosslinking agent, 3 parts of compatibilizer.

[0023] In this embodiment, the melt flow index of the low-density polyethylene is 2.3 g / 10 min.

[0024] In this example, the anti-water tree masterbatch is composed of sorbitol and ethylene-acrylic acid copolymer, wherein the mass ratio of sorbitol to ethylene-acrylic acid copolymer is 1:2.

[0025] In this embodiment, the antioxidant is a mixture of antioxidant 300, antioxidant DSTP, and antioxidant DLTP, wherein the mass ratio of antioxidant 300, antioxidant DSTP, and antioxidant DLTP is 1:0.9:0.9.

[0026] In this embodiment, the crosslinking agent is di-te...

Embodiment 3

[0030] Embodiment 3: Basically the same as Embodiment 1 and Embodiment 2, the difference is that: a kind of anti-water tree cross-linked polyethylene insulating material is made of the following raw materials in parts by weight, wherein: low density polyethylene 95 7 parts, 7 parts of anti-water tree masterbatch, 0.8 parts of antioxidant, 2.5 parts of crosslinking agent, 0.9 parts of co-crosslinking agent, 2.5 parts of compatibilizer.

[0031] In this embodiment, the melt flow index of the low-density polyethylene is 2.1 g / 10 min.

[0032] In this example, the anti-water tree masterbatch is composed of sorbitol and ethylene-acrylic acid copolymer, wherein the mass ratio of sorbitol to ethylene-acrylic acid copolymer is 1:1.6.

[0033] In this embodiment, the antioxidant is a mixture of antioxidant 300, antioxidant DSTP and antioxidant DLTP, wherein the mass ratio of antioxidant 300, antioxidant DSTP, and antioxidant DLTP is 1:0.8:0.8.

[0034] In this embodiment, the crosslin...

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Abstract

The invention discloses a water-tree-resistant crosslinked polyethylene insulating material which is prepared from the following raw materials in parts by weight: 80-110 parts of low-density polyethylene, 6-8 parts of water-tree-resistant master batch, 0.7-0.9 part of an antioxidant, 2.2-2.8 parts of a crosslinking agent, 0.8-1 part of an assistant crosslinking agent and 2-3 parts of a compatibilizer, and the melt flow index of the low-density polyethylene is 1.9-2.3 g / 10min. The sorbitol and the ethylene-acrylic acid copolymer are added into the formula of the crosslinked polyethylene insulating material according to a certain mass ratio, so that the water molecule invasion resistance of the crosslinked polyethylene insulating material is improved, and the effect of resisting water tree formation of the insulating material is remarkable, therefore, the crosslinked polyethylene insulating material is excellent in insulating property and good in safety performance during molding application, and the service life of the crosslinked polyethylene insulating material is also prolonged.

Description

technical field [0001] The invention relates to an insulating material, in particular to a water tree-resistant cross-linked polyethylene insulating material. Background technique [0002] In order to meet the needs of economic development for electricity consumption and solve the growing grid load problem, it is necessary to strengthen the construction of cable lines, but it is often necessary to consider many factors such as line direction, electromagnetic environment, and urban planning; XLPE cables are characterized by their It is widely used in the power system due to its advantages of less land occupation and convenient construction; high-voltage cable lines are responsible for important power transmission tasks in the urban network, and the cable insulation cannot be self-recovering. Once an accident occurs due to internal defects, the current traffic Polyethylene cables have the problem of "water trees", that is, the quality is reduced due to the penetration of exter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L53/02C08K5/053C08K5/14H01B3/44
CPCC08L23/06H01B3/441C08L2312/00C08L2207/066C08L2203/202C08L23/0869C08L53/025C08K5/053C08K5/14
Inventor 李秀峰杨培杰白帆刘超
Owner NANJING ZHONGCHAO NEW MATERIALS
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