Cross-linking semiconductive inner shielding cable material for 35KV crosslinked polyethylene cable and preparation method thereof

A cross-linked polyethylene, cross-linked technology, applied in the direction of power cables with shielding layer/conductive layer, etc., can solve the problems of high cost and burning, and achieve the effect of reducing dosage and cost

Active Publication Date: 2014-11-12
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is still easy to burn in the process of extruding the cable in the later stage, and the cost is too high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] Embodiment and comparative example formula

[0031] Table 1: Embodiment and comparative example formula

[0032] Example 1 Example 2 Example 3 Comparative example 1 Comparative example 2 EVA 50 52 54 52 52 Conductive carbon black 38 36 32 36 36 Dispersant 2 1.8 1.6 1.8 1.8 antioxidant 1 1.3 1.6 1.3 1.3 plasticizer 4.32 3 3.68 3.1 7 crosslinking agent 1.6 1.8 2.0 1.8 1.8 Anti copper agent 0.08 0.10 0.12 0 0.1 fuel oil 3 4 5 4 0

[0033] The EVA used in the embodiment is North Organic 18-3, the MFR value is 2 ~ 3g / 10min, and the VA content is between 17% ~ 19%;

[0034] Conductive carbon black is conductive carbon black JE6900, the manufacturer is Taiwan China Rubber, and its DBP value is 100~145 ml / 100g;

[0035] The antioxidant is antioxidant 300;

[0036] The cross-linking agent is DCP;

[0037] The anti-copper agent is MD1024, and the manufacturer is Ciba.

[00...

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PUM

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Abstract

The invention discloses a cross-linking semiconductive inner shielding cable material for a 35KV crosslinked polyethylene cable. A preparation method of the cross-linking semiconductive inner shielding cable material comprises the following steps of: uniformly mixing additives such as EVA (Ethylene-vinyl Acetate) resin, conductive carbon black, an antioxidant, a dispersant, a plasticizer, fuel oil, a copper resistance agent and the like firstly, then extruding the mixture by an extruder to carry out granulation, and finally, adding a peroxide crosslinking agent through an imbibition method. According to the cross-linking semiconductive inner shielding cable material disclosed by the invention, the copper resistance agent is added, thus avoiding the scorching phenomenon caused by pre-crosslinking due to copper ions produced by a conductor core layer in the cable extruding process; and in addition, the fuel oil is also added in the cross-linking semiconductive inner shielding cable material as a lubricant, so that the carbon black and the various additives can be uniformly dispersed in the EVA, thus reducing the dosage of the plasticizer and lowering the cost.

Description

technical field [0001] The invention relates to the technical field of polymer insulation and conductive composite materials, in particular to a cross-linkable semi-conductive inner shielding material of cross-linked polyethylene used for 35KV power cables. Background technique [0002] At present, cross-linked polyethylene is the preferred material for the insulation of medium and high voltage power cables. The semi-conductive shielding layer is an indispensable part of XLPE cables, especially high-voltage XLPE cables. The semi-conductive composite material whose main insulating layer is not damaged is divided into inner shielding layer and outer shielding layer. The semi-conductive material between the conductive core layer and the insulating layer is usually called the inner shielding layer. The main function of using the inner and outer semi-conductive shielding layers in the cable is to make the electric field evenly distributed, reduce the electric field intensity, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08K13/02C08K3/04C08K5/25C08K5/29C08K5/3472H01B9/02B29B9/06
Inventor 鄢薇赵和英于涛甄建
Owner CHINA PETROLEUM & CHEM CORP
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