§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
EP0099640A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Cross-linked polyethylene insulated cables

Assignee: Sumitomo Electric Industries Ltd
•
Filing: 1983-06-13
•
Granted: —
•
Expires: 2003-06-13
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract @ A cross-linked polyethylene cable produced by extrusion coating a polyethylene composition 2 on a conductor 1, the polyethylene composition comprising polyethylene, more than 10% to less than 30% by weight of an ethylene-vinyl acetate copolymer having a VA content of more than 25% to less than 35% by weight and an organic peroxide and thereafter cross-linking the thus coated polyethylene composition. Such a cable shows greatly improved resistance to degradation under continuously applied voltages at high temperature for extended periods of time. Thus, the cable has a long service life even when used under conditions of high temperature for extended period of time.

Inventors

  • 👤 Shosuke Osaka Works Of Sumitomo Yamanouchi
  • 👤 Sadao Osaka Works Of Sumitomo Electric Fukunaga
  • 👤 Hironaga Osaka Works Of Sumitomo Elec. Matsubara

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-08 13:14
CPC Classifications
H; H01; H01B; H01B9/00; H01B9/02; H01B9/027; C; C08; C08K; C08K5/00; C08K5/04; C08K5/14; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/08; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; C08L23/0846; C08L23/0853; C08L2312/00

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 63 words
A cross-linked polyethylene insulated cable which is prepared by extrusion coating a polyethylene composition on a conductor, the polyethylene composition comprising polyethylene, more than 10% to less than 30% by weight of an ethylene-vinyl acetate copolymer having a VA content of more than 25% to less than 35% by weight, an organic peroxide and others, and thereafter cross-linking the thus coated polyethylene composition.
Claim 2
Dependent Claim 63 words
A cross-linked polyethylene insulated cable which is prepared by extrusion coating a polyethylene composition on a conductor, the polyethylene composition comprising polyethylene, more than 10% to less than 30% by weight of an ethylene-vinyl acetate copolymer having a VA content of more than 25% to less than 35% by weight, an organic peroxide and others, and thereafter cross-linking the thus coated polyethylene composition.
Claim 3
Dependent Claim 26 words
The cross-linked polyethylene insulated cable as claimed in Claim 1, wherein the VA content of the ethylene-vinyl acetate copolymer is from 28 to 33% by weight.
Claim 4
Dependent Claim 22 words
The c=oss-linked polyethylene cable as claimed in Claim 2, wherein the VA content of the ethylene-vinyl acetate copolymer is 30% by weight.
Claim 5
Dependent Claim 27 words
The cross-linked polyethylene cable as claimed in Claim 3, wherein the amount of the ethylene-vinyl acetate copolymer compounded is about 20% by weight based on the composition.
Claim 6
Dependent Claim 15 words
A cross-linked polyethylene cable substantially as hereinbefore described with reference to the accompanying drawing .
Claim 7
Dependent Claim 15 words
A cross-linked polyethylene cable substantially as hereinbefore described with reference to the accompanying drawing .

References Cited (Backward Citations)

GB2019412A Cited

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag