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A layer for cables having improved stress whitening resistance

A cable insulation and polarity technology, applied in circuits, electrical components, insulators, etc., can solve undisclosed problems

Active Publication Date: 2009-05-06
ボレアリステクノロジーオイ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, EP 0 893 801 A1 does not disclose the possibility of polypropylene layers being suitable for high temperature operating conditions while having very good mechanical properties

Method used

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  • A layer for cables having improved stress whitening resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0106] Different polypropylene compositions are extruded on round aluminum conductors. The diameter of the conductor is 3mm and the thickness of the insulating layer is 0.7mm. The wire travel speed was 75m / min and the temperature on the wire was set at 178-241°C, resulting in a melting temperature of approximately 240°C. The temperature of the cooling bath was 23°C. At a line speed of 75 m / min the extrudability of the polypropylene composition according to the invention is good, a smooth surface can be obtained.

[0107] materials:

[0108] a) Polypropylene-based resin (A):

[0109] Two different polypropylene-based resins (A) were used in the examples.

[0110] Polypropylene-based resin A1 is a heterophasic polypropylene copolymer of polypropylene-random copolymer as the matrix phase and ethylene-propylene-rubber as the dispersed phase, and its total C 2 - The content is about 15 wt.%, the total XS (xylene solubles) content is about 27 wt.%, and the MFR (230°C / 2.16kg) is...

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Abstract

The present invention relates to a Insulation layer for cables, a composition and a process thereof, showing improved stress whitening resistance by maintaining good mechanical and electrical properties and being environmental friendly.

Description

technical field [0001] The present invention relates to a cable insulation layer showing improved stress whitening resistance while maintaining good mechanical and electrical properties and environmental friendliness. Furthermore, the invention relates to a composition which can be used to produce the insulating layer, while the invention also relates to a method for producing such a layer. In addition, the invention also relates to cables comprising the layers of the invention. Background technique [0002] Ethylene polymer products are now mainly used for insulation in semi-conductive shielding of low, medium and high voltage cables due to their ease of processability and beneficial electrical properties and their good performance with regard to stress whitening resistance respectively. [0003] In addition, polyvinyl chloride (PVC) is also commonly used as an insulating material in cable applications, usually in combination with softeners to achieve the desired degree of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/10C08L23/08H01B3/00
CPCC08L23/0853H01B3/441C08L23/0869C08L23/04C08L23/10C08L2666/06C08L23/08H01B3/00
Inventor 克里斯泰勒·格赖因芒努斯·帕尔姆勒夫马库斯·加尔艾特纳伯恩特-奥克·苏丹乌尔夫·托尔格森
Owner ボレアリステクノロジーオイ
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