HIGH VOLTAGE INSULATED ELECTRIC CABLE HAVING OUTER SEMICONDUCTIVE LAYER

• US 3,684,821 A
• Filed: 03/30/1971
• Issued: 08/15/1972
• Est. Priority Date: 03/30/1971
• Status: Expired due to Term

• Current Assignee: Hirokazu Miyauchi, Hironaga Matsubara
• Original Assignee: Hirokazu Miyauchi, Hironaga Matsubara
• Inventors: Miyauchi, Hirokazu, Matsubara, Hironaga
• Primary Examiner(s): Goldberg, E. A.
• Application Number:
  US05/129,558
• Time in Patent Office: 504 Days
• Field of Search: 174/12A,12SC,12R,12SC,16SC,11PM 117/216,232
• US Class Current: 174/102.0SC
• CPC Class Codes: H01B 3/004 with conductive additives or conductive layers
• CPC Class Codes: H01B 3/441 from alkenes
• CPC Class Codes: H01B 9/027 composed of semi-conducting layers
• CPC Class Codes: Y10S 174/27 including a semiconductive layer

Abstract

This invention relates to an insulated cable having an outer semiconductive layer, and more particularly relates to the structure of an insulated cable chiefly consisting of a crosslinked polyethylene or a crosslinked polyethylene copolymer, having an outer semiconductive layer. The composition is a mixture of 10 - 90 percent by weight of ethylene-vinyl acetate copolymer having 15 - 55 percent by weight of vinyl acetate content with 90 - 10 percent by weight of ethylene-vinyl acetatevinyl chloride terpolymer, said mixture being used as a base, said base being mixed with a cross-linking agent and a conductivity imparting agent such as carbon black.

Claims

2. An insulated cable as claimed in claim 1 characterized by the use of Di- Alpha -cumyl peroxide as a cross-linking agent of the semiconductive layer.

3. An insulated cable as claimed in claim 1 characterized by the use of 2.5-dimethyl-2'"'"''"'"'.5'"'"''"'"'-di-(tertiary butyl peroxy)-hexine-3 as a cross-linking agent of the semiconductive layer.

4. An insulated cable as claimed in claim 1 wherein the insulation layer is made of crosslinked polyethylene.

5. An insulated cable as claimed in claim 1 wherein the insulation layer is made of crosslinked polyolefine consisting of ethylene-vinyl acetate copolymer.

6. An insulated cable as claimed in claim 1 wherein an inorganic filler is added to the composition of said insulation layer.

7. The insulated electric cable of claim 1 wherein antioxidant and processing aids are included in the composition of said outer semiconductive layer as required.