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Semi-conductive mixture

A semi-conductive, mixture technology, applied in the field of semi-conductive mixture, can solve the problems of hardening of semi-conductive mixture and easy cracking of semi-conductive layer

Inactive Publication Date: 2005-05-04
THE FUJIKURA CABLE WORKS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, when the conductivity is increased by increasing the amount of conductive carbon black, the semiconductive mixture will harden, resulting in easy cracking of the semiconductive layer.

Method used

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Examples

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Embodiment

[0029] Experimental examples of the above-mentioned embodiment will be described below to clarify their effects.

[0030] After the mixture is kneaded with a kneader according to the compounding amount shown in Table 1 at the end of this specification, it is hot-pressed at 200°C for 30 minutes by a hot press to form a test sheet (thickness 1mm), and its temperature at 60°C is measured. Under the volume resistance rate, and according to the JIS-K-7113-1981 test method, the tensile elongation at failure was measured. The results are shown in Table 1.

[0031] It can be seen from Table 1 that the volume resistance of the above mixtures is less than 700Ω·cm, and the elongation is high elongation of more than 200%, showing excellent mechanical strength.

[0032] Next, the mixtures shown in Table 1 (Examples 1, 5, 8, and Comparative Examples 12 to 14) were used in the semiconductive layer to manufacture a 6.6KV class cross-linked polyethylene insulated vinyl cable (CV cable). Spec...

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PUM

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Abstract

The invention relates to a kind of semiconduction mixture. Generate basic polymer by low-density polythene with 20-70 part by weight and other polyolefin polymer with 80-30 part by weight, and then cooperate semiconduction carbon black with 30-80 part by weight in this basic polymer with 100 part by weight.

Description

technical field [0001] The present invention relates to a semiconductive compound that can be used in semiconductive layers such as inner semiconductive layers and outer semiconductive layers of cross-linked polyethylene insulated cables and the like. Background technique [0002] The semiconductive compound is used in the semiconductive layer such as the inner semiconductive layer or the outer semiconductive layer provided between the conductor and the insulating layer of cables such as cross-linked polyethylene insulated cables suitable for high voltage. For this material, it is necessary to control the reduction of the volume resistivity from the viewpoint of mitigating the potential gradient or preventing partial discharge, etc., and it is also necessary to maintain high mechanical strength such as resistance to elongation in the longitudinal direction when laying cables. [0003] Such semiconductive mixtures have traditionally used polyolefin polymers such as ethylene-v...

Claims

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Application Information

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IPC IPC(8): C08K3/04C08L23/06
Inventor 石川虎一杉山松次郎国村智高桥享
Owner THE FUJIKURA CABLE WORKS LTD
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