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EP0380244A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Building cables which include non-halogenated plastic materials

Assignee: AT&T Inc
•
Filing: 1990-01-18
•
Granted: —
•
Expires: 2010-01-18
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Abstract

Abstract A cable which may be used in buildings in concealed areas such as in plenums or in riser shafts includes a core (22) which includes at least one transmission medium which is enclosed in a non-halogenated plastic material. The core is enclosed with a jacket (28) which also is made of a non-halogenated plastic material. The non-halogenated material which encloses the transmission medium and the jacket is a plastic material selected from the group consisting of a filled polyolefin, a polyetherimide and a silicone-polyimide copolymer, and blend compositions of a polyetherimide and a silicone-polyimide copolymer. Interposed between the core and the jacket is a thermal barrier which includes a plastic film which is selected from the group consisting of a polyetherimide, a silicone-­polyimide copolymer, a polyimide, and blend compositions of a polyetherimide and a silicone-polyimide compolymer.

Inventors

  • 👤 Tommy Glenn Hardin
  • 👤 Behrooz A. Khorramian

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-06 18:11
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/29; H01B7/292; G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4429; G02B6/443; G02B6/4436; G02B6/46; G02B6/47; G02B6/475; H01B7/295

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 158 words
A communication cable, which comprises a core which comprises at least one transmission medium, a plastic material which encloses said at least one transmission medium, and a jacket which comprises a plastic material and which encloses said at least one transmission medium, said cable being characterized in that said plastic material which encloses said at least one transmission medium and said plastic material of said jacket each include a plastic material which is selected from the group consisting of a filled polyolefin, a polyetherimide, a silicone-polyimide copolymer, and blend compositions of a polyetherimide and a silicone-polyimide copolymer; and a thermal barrier being disposed between said at least one communications medium and said jacket, said thermal barrier being a laminate comprising a layer of a metallic material and a layer of a plastic material which is selected from the group consisting of a polyetherimide, a silicone-polyimide copolymer, a polyimide, and blend compositions of a polyetherimide and a silicone-polyimide copolymer.
Claim 2
Dependent Claim 158 words
A communication cable, which comprises a core which comprises at least one transmission medium, a plastic material which encloses said at least one transmission medium, and a jacket which comprises a plastic material and which encloses said at least one transmission medium, said cable being characterized in that said plastic material which encloses said at least one transmission medium and said plastic material of said jacket each include a plastic material which is selected from the group consisting of a filled polyolefin, a polyetherimide, a silicone-polyimide copolymer, and blend compositions of a polyetherimide and a silicone-polyimide copolymer; and a thermal barrier being disposed between said at least one communications medium and said jacket, said thermal barrier being a laminate comprising a layer of a metallic material and a layer of a plastic material which is selected from the group consisting of a polyetherimide, a silicone-polyimide copolymer, a polyimide, and blend compositions of a polyetherimide and a silicone-polyimide copolymer.
Claim 3
Dependent Claim 44 words
The cable of claim 1, wherein said filled polyolefin is a composition which comprises a polyolefin plastic material and a filler which is selected from the group consisting of antimony trixoide, a metal hydroxide, and blend compositions of antimony trioxide and a metal hydroxide.
Claim 4
Dependent Claim 21 words
The cable of claim 2, wherein said filler comprises antimony trixoide which comprises five percent by weight of said filled polyolefin.
Claim 5
Dependent Claim 25 words
The cable of claim 2, wherein said filler comprises a metal hydroxide which comprises about 20 to about 70% by weight of said filled polyolefin.
Claim 6
Dependent Claim 15 words
The cable of claim 1, wherein said metallic material of said thermal barrier faces outwardly.
Claim 7
Dependent Claim 25 words
The cable of claim 5, wherein said metallic material of the laminated thermal barrier has an emissivity in the range of about 0.039 to 0.057.
Claim 8
Dependent Claim 19 words
The cable of claim 1, wherein said cable also includes a binder which is wrapped about said thermal barrier.

References Cited (Backward Citations)

US3922465A Cited
EP0056510A1 Cited
EP0197227A1 Cited
EP0258036A2 Cited
EP0268827A1 Cited

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