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Flexible semiconductive shielding material and preparation method thereof

A semi-conductive, shielding material technology, applied in the fields of magnetic/electric field shielding, electrical components, etc., can solve the problems of hardening, embrittlement, processing performance and degradation of semi-conductive shielding materials

Active Publication Date: 2017-06-23
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the current application of semi-conductive shielding materials for power cables, the semi-conductive shielding materials are hardened and embrittled due to the high filling amount of conductive carbon black in the EVA matrix, and the processing performance is reduced, and a flexible cable is prepared. Using semi-conductive shielding materials, the product grade of semi-conductive shielding materials has been further developed, and the product has remarkable flexibility

Method used

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  • Flexible semiconductive shielding material and preparation method thereof

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Embodiment 1

[0014] Embodiment 1: Preparation of flexible semiconductive shielding material

[0015] (1) 70.0 grams of EVA particles were first added to the torque rheometer at 115 ° C, the rotating speed was 65 rpm, then 30.0 grams of high-conductivity carbon black and 0.5 grams of antioxidant 1010 were added, and melt blended for 6 minutes;

[0016] (2) 30.0 grams of SEBS were added to the mixture of (1), melt blended for 3 minutes;

[0017] (3) Add 1.0 gram of crosslinking agent DCP, 1.5 gram of crosslinking aid TAIC and 1.0 gram of solid paraffin into the mixture of (2), melt and blend for 3 minutes, quickly take out the material from the mixer and cool to room temperature;

[0018] (4) Put the sample into a stainless steel mold with a polytetrafluoroethylene isolation film, preheat it at 160°C for 1 minute with a flat vulcanizer, mold it under a pressure of 10 MPa for 8 minutes, and then cool it on a flat vulcanizer at room temperature Press and shape to obtain a sheet sample for tes...

Embodiment 2

[0022] Embodiment 2: Preparation of flexible semiconductive shielding material

[0023] 70.0 grams of EVA; 35.0 grams of highly conductive carbon black; 1.0 grams of antioxidant 1010; 20.0 grams of SBS thermoplastic elastomer; 1.5 grams of crosslinking agent DCP, 2.5 grams of crosslinking auxiliary agent TAIC and 1.5 grams of paraffin wax. The rest is the same as implementation 1.

Embodiment 3

[0024] Embodiment 3: Preparation of flexible semiconductive shielding material

[0025] 80.0 grams of EVA; 40.0 grams of highly conductive carbon black; 1.5 grams of antioxidant 1010; 25.0 grams of SEBS thermoplastic elastomer; 2.0 grams of crosslinking agent DCP, 3.0 grams of crosslinking auxiliary agent TAIC and 2.5 grams of solid paraffin. The rest is the same as implementation 1.

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Abstract

The invention provides a flexible semiconductive shielding material and a preparation method of the flexible semiconductive shielding material. The flexible semiconductive shielding material comprises the following ingredients in parts by weight: 70-90 parts of EVA (ethylene vinyl acetute), 10-30 parts of SEBS (styrene ethylene-butylene styrene), 30-40 parts of high-conductivity carbon black, 0.5-1.5 parts of an antioxidant, 1.0-2.0 parts of a cross-linking agent DCP (dicumyl peroxide), 1.5-3.0 parts of a cross-linking assistant TAIC (triallylisocyanurate), and 1.0-2.5 parts of solid paraffin. The preparation method of the material comprises the following steps: (1) fusing and uniformly mixing EVA, the high-conductivity carbon black and the antioxidant in a high-temperature mixer, (2) adding an SEBS thermoplastic elastomer for fusing and uniform mixing, and (3) finally, adding the solid paraffin, the cross-linking agent DCP and the cross linkage assistant TAIC for fusing and uniform mixing, taking the material out of the mixer rapidly and cooling the room temperature. The semiconductive shielding material has flexibility and semiconduction functions.

Description

technical field [0001] The present invention relates to a flexible semi-conductive shielding material and its preparation method, in particular to a method for preparing a flexible semi-conductive shielding material by controlling the components of a multi-phase system, which belongs to the preparation and performance of cable shielding materials Research. Background technique [0002] Polymer semi-conductive shielding material is widely used in the field of cable shielding. Usually, a semi-conductive shielding layer is arranged around the conductor of the cable to make the electric field evenly distributed and improve the electric strength and service life of the cable. Most of the existing inner shielding materials for XLPE power cables use ethylene-vinyl acetate copolymer (EVA) as the base resin, adding carbon black, antioxidants, lubricants, extruding and granulating to absorb peroxide prepared by cross-linking agent; in order to make it have a lower volume resistivity,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L53/02C08L91/06C08K5/134C08K3/04
CPCH05K9/0081H05K9/0098C08L23/0853C08L2203/202C08L2205/03C08K2201/001C08L2312/00C08L2207/02C08L53/025C08L91/06C08K5/1345C08K3/04
Inventor 王兆波王立斌赵健
Owner QINGDAO UNIV OF SCI & TECH
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