Anti-aging and anti-cracking sheath material for mineral insulated cable and preparation method thereof

A mineral insulated cable, anti-aging technology, applied in the direction of insulators, organic insulators, plastic/resin/wax insulators, etc., can solve the problems of easy aging, cracking, weakening the protective effect of mineral insulated cables, etc., to achieve good protection and improve Effects of aging resistance, UV resistance stability and thermal stability improvement

Pending Publication Date: 2020-05-15
ANHUI MENTOR CABLE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the outer sheath material used for mineral insulated cables is usually polyolefin, which has certain limitations in terms of insulation and mechanical properties, and is prone to aging and cracking, thus weakening the protective effect on mineral insulated cables

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] An anti-aging and anti-cracking sheath material for mineral insulated cables, comprising the following raw materials in parts by weight:

[0025] EVA resin 40, high-density polyethylene 10, maleic anhydride grafted high-density polyethylene 2, maleic anhydride grafted ethylene-1-octene copolymer 1, modified magnesium hydroxide 40, modified mica powder 10, modified Potassium titanate whisker 5, weathering agent UV944 1, antioxidant 1010 1, polyethylene wax 1.

[0026] The preparation method of modified magnesium hydroxide is as follows: add 5000 mesh magnesium hydroxide into water to disperse evenly, prepare magnesium hydroxide slurry with a mass concentration of 5%, then add silane coupling agent KH550, stir at 40°C for 1 hour, filter After drying at 100°C, the modified magnesium hydroxide is obtained by modifying the surface of magnesium hydroxide with a silane coupling agent. The weight ratio of silane coupling agent KH550 to magnesium hydroxide is 0.5:100.

[0027] ...

Embodiment 2

[0033] An anti-aging and anti-cracking sheath material for mineral insulated cables, comprising the following raw materials in parts by weight:

[0034] EVA resin 60, high-density polyethylene 20, maleic anhydride grafted high-density polyethylene 4, maleic anhydride grafted ethylene-1-octene copolymer 2, modified magnesium hydroxide 60, modified mica powder 20, modified Potassium titanate whiskers 10, weathering agent UV770 2, antioxidant 168 1.5, magnesium stearate 2.

[0035] The preparation method of modified magnesium hydroxide is as follows: add 5000 mesh magnesium hydroxide into water to disperse evenly, prepare magnesium hydroxide slurry with a mass concentration of 10%, then add silane coupling agent KH550, stir at 60°C for 2 hours, filter After drying at 110°C, the modified magnesium hydroxide is obtained by modifying the surface of magnesium hydroxide with a silane coupling agent. The weight ratio of silane coupling agent KH550 to magnesium hydroxide is 1:100.

[0...

Embodiment 3

[0042] An anti-aging and anti-cracking sheath material for mineral insulated cables, comprising the following raw materials in parts by weight:

[0043] EVA resin 50, high-density polyethylene 15, maleic anhydride grafted high-density polyethylene 3, maleic anhydride grafted ethylene-1-octene copolymer 1.5, modified magnesium hydroxide 50, modified mica powder 15, modified Potassium titanate whisker 8, weathering agent UV531 1, weathering agent UV770 0.5, antioxidant 1010 0.6, antioxidant 168 0.6, polyethylene wax 1, pentaerythritol stearate 0.5.

[0044] The preparation method of modified magnesium hydroxide is as follows: add 5000 mesh magnesium hydroxide into water to disperse evenly, prepare magnesium hydroxide slurry with a mass concentration of 8%, then add silane coupling agent KH550, stir at 50°C for 1.5h, After filtering and drying at 105°C, the modified magnesium hydroxide is obtained by modifying the surface of magnesium hydroxide with a silane coupling agent. The w...

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Abstract

The invention discloses an anti-aging and anti-cracking sheath material for a mineral insulated cable and a preparation method thereof. The sheath material comprises the following raw materials in parts by weight: 40-60 parts of EVA resin, 10-20 parts of high-density polyethylene, 2-4 parts of maleic anhydride grafted high-density polyethylene, 1-2 parts of maleic anhydride grafted ethylene-1-octene copolymer, 40-60 parts of modified magnesium hydroxide, 10-20 parts of modified mica powder, 5-10 parts of modified potassium titanate whiskers, 1-2 parts of a weather-proof agent, 1-1.5 parts of an antioxidant and 1-2 parts of a lubricant. The sheath material has the advantages of excellent insulating property, ageing resistance, cracking resistance, high mechanical strength, good flame-retardant and smoke-suppressing effects and very high use safety, and can play a very good role in protecting a mineral insulated cable.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to an aging-resistant and anti-cracking sheath material for mineral insulated cables and a preparation method thereof. Background technique [0002] Mineral insulated cables are composed of copper cores, mineral insulating materials, copper and other metal sheaths. They have good electrical conductivity, mechanical and physical properties, and fire resistance, as well as non-combustibility. In case of fire, they can ensure fire protection power supply during the continuation of the fire. , mainly used in high-rise buildings and special places and equipment. In order to protect against corrosion and prolong the service life of mineral insulated cables, it is usually necessary to use an outer sheath material on the outside. At present, the outer sheath material used for mineral insulated cables is usually polyolefin, which has certain limitations in terms of insulation and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08L51/06C08K13/06C08K9/06C08K9/04C08K3/22C08K3/34C08K7/08H01B3/44
CPCC08L23/0853H01B3/441C08L2203/202C08L2205/035C08L2205/025C08L2207/062C08K2003/2224C08L2201/08C08L2201/02C08L23/06C08L51/06C08K13/06C08K9/06C08K9/04C08K3/22C08K3/34C08K7/08
Inventor 周国庆杭士邦
Owner ANHUI MENTOR CABLE GROUP
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