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High-voltage resistant cable sheath material and preparation method thereof

A cable sheathing, high-voltage resistant technology, applied in circuits, electrical components, plastic/resin/wax insulators, etc. Excellent high-voltage performance, excellent electrical performance, and the effect of improving insulation performance

Inactive Publication Date: 2019-01-11
安庆市泽烨新材料技术推广服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although there are domestic manufacturers that can prepare environmentally friendly, flame-retardant, and 90°C PVC insulating grade sheathing materials, they do not have acid and oil resistance, and their application range is limited, and their volume resistivity is low, which cannot meet the requirements of current mainstream cable manufacturers. Requirements for higher electrical properties of insulation grade sheath materials
[0005] In addition, calcium carbonate in the cable filler has a certain reinforcing effect, but calcium carbonate has a certain water absorption, and if the amount is too large, it will reduce the electrical properties of the rubber material, especially the impact on the water-immersed capacitance; Calcium polycarbonate will reduce the flame retardant performance of the cable

Method used

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  • High-voltage resistant cable sheath material and preparation method thereof
  • High-voltage resistant cable sheath material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of modified filler comprises the following steps:

[0026] 1) Calculated in parts by weight, weigh 45 parts of calcium carbonate, 10 parts of talc powder, 12 parts of cobalt oxide and 1 part of nano-silicon dioxide, mix them evenly, add them to a ball mill to form a mixed powder, and then continuously Dry to obtain composite powder;

[0027] 2) In a vacuum environment, the composite powder obtained in step 1) was subjected to discharge plasma sintering, the heating temperature was 900° C., and the holding time was 16 minutes to obtain a sintered powder;

[0028] 3) Cool the sintered powder in step 2 to room temperature, then add it to lubricating base oil for stirring and dispersing, add titanate coupling agent to the dispersion, stir for 12 minutes, and then filter, the filtered product is the modified filler . The addition amount of the titanate coupling agent is 1% of the weight of the sintered powder in the step 2).

Embodiment 2

[0030] The preparation method of modified filler comprises the following steps:

[0031] 1) Calculated in parts by weight, weigh 55 parts of calcium carbonate, 20 parts of talc powder, 6 parts of cobalt oxide and 4 parts of nano-silicon dioxide and mix evenly, add them to a ball mill to form a mixed powder, and then continuously Dry to obtain composite powder;

[0032] 2) In a vacuum environment, the composite powder obtained in step 1) was subjected to discharge plasma sintering, the heating temperature was 1100° C., and the holding time was 12 minutes to obtain a sintered powder;

[0033] 3) Cool the sintered powder in step 2) to room temperature, then add it to lubricating base oil for stirring and dispersing, add titanate coupling agent to the dispersion, stir for 16 minutes, and then filter, and the filtered product is the modified filler . The addition amount of the titanate coupling agent is 3% of the weight of the sintered powder in the step 2).

Embodiment 3

[0035] A high voltage resistant cable sheath material, comprising the following raw materials:

[0036] 76 parts of metallocene polyethylene, 8 parts of polymethacrylic resin, 15 parts of ethylene-vinyl acetate copolymer, 2 parts of expanded graphite, 6 parts of paraffin wax, 12 parts of plasticizer, 4 parts of polyethylene wax, 13 parts of carbon black, 0.4 parts of thiodipropyl dilauryl ester, 5 parts of magnesium hydroxide, 3 parts of calcium-zinc composite heat stabilizer and 30 parts of the modified filler of Example 1. The plasticizer is a mixture of acetyl tributyl citrate and diisobutyl phthalate.

[0037] A preparation method for a high voltage resistant cable sheath material, comprising the following steps:

[0038] 1) Put the plasticizer, magnesium hydroxide, thiodipropyl dilauryl and modified filler into a three-roll mill and grind it into a slurry;

[0039] 2) Put the ground slurry material and the remaining material in step 1) into a high-speed kneader for heat...

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Abstract

The invention provides a high-voltage resistant cable sheath material which contains the following raw materials: 70-80 parts of metallocene polyethylene, 6-12 parts of polymethacrylate resins, 12-18parts of ethylene-vinyl acetate copolymers, 1-3 parts of expanded graphite, 4-8 parts of paraffin, 8-16 parts of a plasticizer, 2-6 parts of a lubricating agent, 8-16 parts of carbon black, 0.2-0.6 part of thiopropyl dilauryl ester, 3-6 parts of magnesium hydroxide, 2-5 parts of a heat stabilizer and 25-35 parts of modified fillers. The preparation method comprises the following steps: adding theplasticizer, magnesium hydroxide, thiopropyl dilauryl ester and modified fillers into a three-roll grinder to be ground into slurry; and kneading the slurry and the rest raw materials, and performingtwin-screw extrusion granulation. The high-voltage resistant cable sheath material has excellent insulation and flame retardant properties and high hardness.

Description

technical field [0001] The invention belongs to the technical field of cables, and in particular relates to a high-voltage resistant cable sheath material and a preparation method thereof. Background technique [0002] In recent years, a number of domestic cable manufacturers have carried out research and development, and have produced wind power cables with low temperature resistance, UV resistance, oil resistance, and torsion resistance, which have become a new economic growth point for enterprises. In recent years, all walks of life are promoting safety and environmental protection, and of course the wire and cable industry is no exception. [0003] High-voltage cable is a kind of power cable, which refers to the power cable used to transmit between 1kv-1000kv, and is mostly used in power transmission and distribution. The components of the high-voltage cable from the inside to the outside include: conductor, insulation, inner sheath, filler (armoring), and outer insulat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L33/02C08L23/08C08L91/06C08K7/24C08K3/04C08K3/22C08K5/11C08K5/12C08K9/00C08K9/04C08K3/26C08K3/34C08K3/36H01B3/44
CPCC08K2003/2224C08K2003/2289C08K2003/265C08K2201/011C08L23/06C08L2201/02C08L2203/202C08L2205/035H01B3/441C08L33/02C08L23/0853C08L91/06C08K7/24C08K3/04C08K3/22C08K5/11C08K5/12C08K9/00C08K9/04C08K3/26C08K3/34C08K3/36
Inventor 汪泽维
Owner 安庆市泽烨新材料技术推广服务有限公司
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