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A kind of peelable insulation shielding material for medium voltage rubber cable and its preparation process

A rubber cable, insulation and shielding technology, applied in the direction of insulators, organic insulators, plastic/resin/wax insulators, etc., can solve the problems of poor processing and extrusion technology, limit the use of halogen-containing materials, flashover discharge, etc., and achieve conductive performance Good, improve the performance of processing technology, improve the effect of sticking behavior

Active Publication Date: 2020-07-14
SHANGHAI LANHAO ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the processing and extrusion process of this formula system is poor, and there is a certain residue on the surface of the ethylene-propylene insulation during peeling, there is a risk of flashover discharge during use, and environmental protection requirements also limit the use of halogen-containing materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] A method for preparing a peelable insulation shielding material for medium-voltage rubber cables, specifically comprising the following steps:

[0021] One-time kneading: Add acrylate rubber, superconducting carbon black, graphite powder, anti-aging agent 445, polyethylene wax, Aflux16 to the kneader in sequence, add DOP after kneading for 1 min and continue kneading, control the kneading temperature to 85 ~100°C;

[0022] Secondary mixing: after the primary mixed rubber is parked overnight, put it into the internal mixer and then add TCY, BZ and CTP for secondary mixing. The mixing temperature should not exceed 80°C, and then the calender is discharged into the eight-roller cooling box and put into the box , even sulfur after parking for 24 hours;

[0023] Continuous vulcanization: put the mixed rubber into the extruder for continuous sulfur extrusion, control the temperature of the extruder at 65-90°C, the vulcanization steam pressure at 1.4MPa, and the traction spee...

specific Embodiment 1

[0026] A strippable insulating shielding material for medium-voltage rubber cables disclosed by the present invention, its preparation steps are as follows:

[0027] Choose 100 parts of acrylic rubber, 1 part of TCY, 0.3 parts of CTP, 1 part of BZ, 1 part of anti-aging agent 445, 3 parts of polyethylene wax, 1 part of Aflux 16, 50 parts of superconducting carbon black, 20 parts of graphite powder, DOP 6 share. During the first stage of mixing, add all compounding ingredients except TCY and BZ, the order of adding is rubber, carbon black, anti-aging agent, polyethylene wax, and finally DOP is added, and the mixing temperature needs to reach 85-100°C. Add TCY and BZ vulcanizing agents in the second stage, and park for 24 hours for continuous sulfuration. During the continuous sulfur extrusion process, the temperature of the extruder is set at 65-90°C, the vulcanization steam pressure is 1.3MPa, and the traction speed is 20m / min.

specific Embodiment 2

[0029] A strippable insulating shielding material for medium-voltage rubber cables disclosed by the present invention, its preparation steps are as follows:

[0030] Choose 100 parts of acrylic rubber, 1.5 parts of TCY, 0.7 parts of CTP, 1.5 parts of BZ, 1.5 parts of antioxidant 445, 4 parts of polyethylene wax, 2 parts of Aflux 16, 60 parts of superconducting carbon black, and 15 parts of graphite powder , DOP 8 servings. During the first stage of mixing, add all compounding ingredients except TCY and BZ, the order of adding is rubber, carbon black, anti-aging agent, polyethylene wax, and finally DOP is added, and the mixing temperature needs to reach 85-100°C. Add TCY and BZ vulcanizing agents in the second stage, and park for 24 hours for continuous sulfuration. During the continuous sulfur extrusion process, the temperature of the extruder is set at 65-90°C, the vulcanization steam pressure is 1.4MPa, and the traction speed is 25m / min.

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PUM

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Abstract

The invention discloses a peelable insulating shielding material for medium-voltage rubber cables. The prepared effective components comprise the raw materials by weight: 100 parts of acrylate rubber,1-2 parts of TCY, 0.3-1 part of CTP, 1-2 parts of BZ, 1-2 parts of an anti-aging agent 445, 3-5 parts of polyethylene wax, 1-3 parts of Aflux 16, 50-70 parts of superconducting carbon black, 10-20 parts of a graphite powder, and 6-10 parts of DOP. The invention provides the peelable insulating shielding material for the medium-voltage rubber cables; the peelable insulating shielding material canbe easily peeled off after co-extrusion vulcanization with ethylene-propylene insulating double layers, the peeling force is 10-30 N / 10 mm, and the volume electrical resistivity is 30-50 Ohm*cm. Meanwhile, the material has the advantages of high temperature resistance, oil resistance, no halogen and the like.

Description

technical field [0001] The invention belongs to the technical field of cable sheath materials, and in particular relates to a peelable insulation shielding material for medium-voltage rubber cables and a preparation method of the material. Background technique [0002] Generally, the working voltage of medium-voltage cables is relatively high, ranging from 6kV to 45kV. At this time, any tip or air hole on the inner and outer surfaces of the cable insulation or in the insulating layer is extremely easy to generate high-voltage tip discharge, resulting in excessive partial discharge and insulation shock. Therefore, the general production process adopts three-layer co-extrusion technology, extruding a layer of semi-conductive layer with a thickness of about 0.7mm on the inner and outer surfaces of the insulation, so as to evenly insulate the electric field on the surface and shield the external electric field from affecting the conductor. Interference, improve cable life. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/04C08L23/06C08K13/02C08K5/12C08K3/04H01B3/44
CPCC08K2201/001C08L33/04C08L2201/04C08L2201/08C08L2201/22C08L2203/202H01B3/447C08L23/06C08K13/02C08K5/12C08K3/04
Inventor 钱章兴王兵兵田敏
Owner SHANGHAI LANHAO ELECTRIC
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