GB1321243A - Insulated electric cables - Google Patents

Insulated electric cables

Info

Publication number
GB1321243A
GB1321243A GB1321243DA GB1321243A GB 1321243 A GB1321243 A GB 1321243A GB 1321243D A GB1321243D A GB 1321243DA GB 1321243 A GB1321243 A GB 1321243A
Authority
GB
United Kingdom
Prior art keywords
semi
insulating layer
cross
parts
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Publication of GB1321243A publication Critical patent/GB1321243A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H01B9/027—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of semi-conducting layers

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Conductive Materials (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

1321243 Electric cables SUMITOMO ELECTRIC INDUSTRIES Ltd 25 Sept 1970 45820/70 Heading H1A A cross-linked polyethylene or cross-linked polyethylene copolymer insulated cable has an external semi-conducting layer designed for easy removal. The semi-conductive layer comprises an ethylene vinyl acetate copolymer, extruded over the insulating layer, containing 25-55% wt. vinyl acetate, 2,5-dimethyl-2<SP>1</SP>,5<SP>1</SP>- di(tertiary butyl peroxy) - hexyne - 3 crosslinking agent, and an electroconductive substance such as carbon black. For best results of stripping the semi-conductive layer without leaving any semi-conductor on the insulating layer nor marring the insulating layer are recommended a range in excess of 0À2 but less than 6 wt. parts of cross-linking agent, and 25-70 wt. parts of carbon black, based on 100 wt. parts of the polymer. Inorganic fillers such as talc or clay may be added to the insulating layer. Amine based or phenol based aging inhibitors, also processing aids, may be added to either layer.
GB1321243D 1970-09-25 1970-09-25 Insulated electric cables Expired GB1321243A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4582070 1970-09-25

Publications (1)

Publication Number Publication Date
GB1321243A true GB1321243A (en) 1973-06-27

Family

ID=10438729

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1321243D Expired GB1321243A (en) 1970-09-25 1970-09-25 Insulated electric cables

Country Status (1)

Country Link
GB (1) GB1321243A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4767894A (en) * 1984-12-22 1988-08-30 Bp Chemicals Limited Laminated insulated cable having strippable layers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4767894A (en) * 1984-12-22 1988-08-30 Bp Chemicals Limited Laminated insulated cable having strippable layers

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee
PCPE Delete 'patent ceased' from journal

Free format text: 5176, PAGE 1305

PE20 Patent expired after termination of 20 years