Radiating coaxial cable with improved flame retardancy

Wave transmission lines and networks – Long lines – Leaky lines

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174121A, H01P 306, H01Q 1300

Patent

active

048003514

ABSTRACT:
A radiating cable of the foam dielectric type is provided with increased flame-retardant capabilities by provision of an inert barrier tape between an apertured, corrugated outer conductor and the external jacket surrounding the conductor. The barrier tape is composed of non-halogenated, self-extinguishing insulating material and is wrapped over the outer conductor in such a way as to completely cover the radiating apertures disposed thereupon. The barrier tape prevents the melting and bubbling of the dielectric foam outwardly through the radiating slots into penetrating contact with the external jacket when the cable is subjected to high-intensity flames, without significantly affecting the transmission characteristics of the cable.

REFERENCES:
patent: 3823255 (1974-07-01), La Gase et al.
patent: 4280225 (1981-07-01), Willis
patent: 4284842 (1981-08-01), Arroyo et al.
patent: 4659871 (1987-04-01), Smith et al.
Pedersen et al., Low-Smoke, Halogenfree Ship-Offshore/Onshore Cables With Improved Flame Retardance and Fire Resistance, International Wire & Cable Symposium Proceedings 1983, pp. 200-220.
Bertsch et al., New Mica Paper Insulation for Fire Resistant Cables, Cogebi, Belgium.
Palmer et al., Light Weight Polyimide Film/Mica Marine Cable, International Wire & Cable Symposium Proceedings 1985, pp. 250-225.
Pedersen, Halogenfree Cables for Ships and Offshore Oil Platforms Electrical Commnnication, vol. 59, No. 4, 1985, pp. 365-368.
Og. 7 of BICC Catalog, Cableselector No. E28.

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