发明名称 |
Polyethylene for an insulation layer of a power cable and a crosslinked polyethylene insulated power cable using the same |
摘要 |
A polyethylene for an insulation layer of a power cable, of which the dissipation factor never increases even in a high-temperature, high electric field, and a crosslinked polyethylene insulated power cable which uses this polyethylene so that the high-temperature dielectric breakdown voltage is large enough for high-capacitance transmission. This polyethylene is a low-density polyethylene which is synthesized by high-pressure radical polymerization of ethylene, and has properties including: a melt flow rate of 0.1 to 10 g/10 minutes; a density of 0.915 to 0.935 g/cm3; an absorbance of 0.03 to 1.0 for a ketone-type carbonyl group, having a peak in a position corresponding to a wave-number of 1,725+/-4 cm-1 in an infrared absorption spectrum, an absorbance of 1.0 or less for an ester-type carbonyl group, having a peak in a position corresponding to a wave-number of 1,743+/-4 cm-1 and absorbances of less than 0.03 for other carbonyl groups; and/or a content of 3% by weight or less for components eluted at a temperature not lower than an elution temperature T ( DEG C.) calculated as T=687xD-547, where D (g/cm3) is the density of the low-density polyethylene, in a CFC measurement.
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申请公布号 |
US5521010(A) |
申请公布日期 |
1996.05.28 |
申请号 |
US19940311528 |
申请日期 |
1994.09.23 |
申请人 |
THE FURUKAWA ELECTRIC CO., LTD.;MITSUBISHI CHEMICAL CORPORATION |
发明人 |
TANAKA, TOSHIYA;KIMURA, HITOSHI;YAMAMOTO, KOJI;ISHIOKA, MITSUGU;GOTO, SETSUO |
分类号 |
C08F110/02;C08K5/14;H01B3/44;H01B7/29;(IPC1-7):B32B15/00;D02G3/00 |
主分类号 |
C08F110/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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