Title:
INSULATING TAPE FOR COATING CONNECTION PART OF POWER CABLE, METHOD FOR FORMING INSULATING COATING ON EXTERIOR SURFACE OF CONNECTION PART OF POWER CABLE, AND POWER CABLE
Document Type and Number:
WIPO Patent Application WO/2020/204013
Kind Code:
A1
Abstract:
Provided are: an insulating tape which is for coating a connection part of a power cable, and which is unlikely to cause local cracking to a fused part even when a highly hydrophilic polyethylene is used; a method for forming insulating coating using said insulating tape; and a power cable using said insulating tape. This insulating tape is formed of a resin material comprising: a polyethylene which is at least partially modified by a molecule capable of imparting hydrophilicity; an antioxidant; and a cross-linking agent. The antioxidant has a molecular weight of not less than 190 but less than 1,050. The contained amount of the antioxidant is 0.05-0.8 parts by mass with respect to 100 parts by mass of the polyethylene. The insulating tape has a thickness of 50-250 μm. In addition, this power cable 1 is provided with a connection structure 17 that has: a connection part 171 formed by conductively connecting ends of multiple power cables where respective conductors 11a, 11b are exposed; and an insulating coating 173 which is formed on the exterior surface of the connection part 171 by at least winding and cross linking the aforementioned insulating tape around the circumference of the connection part 171.
Inventors:
MIEDA TETSUYA (JP)
KANAYA TAKAHIRO (JP)
KANAYA TAKAHIRO (JP)
Application Number:
PCT/JP2020/014713
Publication Date:
October 08, 2020
Filing Date:
March 30, 2020
Export Citation:
Assignee:
FURUKAWA ELECTRIC CO LTD (JP)
International Classes:
H01B17/56; C08K13/00; C08L23/26; H02G1/14; H02G15/08
Foreign References:
| JPS625032B2 | 1987-02-03 | |||
| JP2013026048A | 2013-02-04 | |||
| JPH10273553A | 1998-10-13 | |||
| JPS6271115A | 1987-04-01 | |||
| JPS62227988A | 1987-10-06 | |||
| JPH0940948A | 1997-02-10 |
Other References:
TERUO FUKUDA: "Water Treeing Inhibiting Material in CV Cable Insulator", JOURNAL OF THE INSTITUTE OF ELECTRICAL ENGINEERS OF JAPAN, vol. 108, no. 5, 1988, pages 389 - 396
See also references of EP 3951807A4
See also references of EP 3951807A4
Attorney, Agent or Firm:
SAITO Takuya et al. (JP)
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