Building cables which include non-halogenated plastic materials

Details Building cables which include non-halogenated plastic materials Building cables which include non-halogenated plastic materials

1989-01-27

1990-07-17

Sikes, William L.

Electricity: conductors and insulators

Feedthrough or bushing

Compression

350 9634, 174107, G02B 644, G02B 600, H02G 1502

Patent

active

049417290

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 copolymer.

REFERENCES:
patent: 4284842 (1981-08-01), Arroyo et al.
patent: 4605818 (1986-08-01), Arroyo et al.
Article Authored by Messrs. S. Artingstall, A. J. Pyle, and Dr. J. A. Taylor entitled "Recent Advances in Thermoplastic, Zero Halogen, Low Smoke, Fire Retardant Cable Compound Technology".
"Norway's PTT Forces Halogen-Free Alternatives in Cable Covering".
Tender by Telecom Australia dated 9/3/85.
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Allianz Versicherungs-AG Technische Information (1980).
Brochure of the Union Carbide Corporation discloses thermoplastic non-halogen flame retardant material.
General Electric'sNORYL PX1766 undated brochure.
Fire and Flammability Bulletin, vol. 9, No. 7, dated Feb. 1988.
AT&T Practice Standard, Issue 3, Nov. 1987, entitled "Fire Safety Considerations of Cable in Buildings".
"Fire Testing of Riser Cables" by L. J. Przybyla appearing in Vol. 3, Jan./Feb. '85, issue of Journal of Fire Sciences.
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S. Kaufman's article entitled "PVC in Communications Cable", published in the Journal of Vinyl Technology, Sep. '85, vol. 7, #3.
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Brochure entitled Smoke Density and Toxicity.
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Article from New Products entitled "Initial and Secondary Fire Damage Costs".
Article from Telecommunication Journal entitled "Fire Precautions in Telephone Exchanges", vol. 49, 1982, p. 223.
In Interview an interview with Hans de Munck entitled "Developing NORYL Resin PX1766".
S. Kaufmann et al., "A Test Method for Measuring and Classifying the Flame Spreading and Smoke Generating Characteristics of Communications Cable".
S. Kaufman, "The 1987 National Electrical Code Requirements for Optical Fiber Cable".
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