Optical fiber cable which includes waterblocking and freeze prev

Details Optical fiber cable which includes waterblocking and freeze prev Optical fiber cable which includes waterblocking and freeze prev

1992-06-29

1994-06-14

Bovernick, Rodney B.

Optical waveguides

Optical transmission cable

Loose tube type

G02B 644

Patent

active

053217888

ABSTRACT:
An optical fiber cable (20) includes provisions in a core thereof for preventing the flow of water longitudinally along the core and for preventing freezing of such water. The provisions for preventing freezing of water within the core, which could effect adversely the optical fibers, includes an antifreeze material. Each of two tapes may be impregnated with an antifreeze material such as propylene glycol, for example, and used to provide a laminate with a superabsorbent powder therebetween. Advantageously, the cable may have suitable flame retardance so that it may extend from an outside manhole to distribution points within a building.

REFERENCES:
patent: 3425971 (1969-02-01), Gugliemeill et al.
patent: 4002819 (1977-01-01), Woytiuk
patent: 4176240 (1979-11-01), Sabia
patent: 4802732 (1989-02-01), Kufuma et al.
patent: 4946237 (1990-08-01), Arroyo et al.
patent: 5020875 (1991-06-01), Arroyo et al.
patent: 5138685 (1992-08-01), Arroyo et al.
Djock, et al., "Review of Synthetic and Starch-Graft Copolymer Superabsorbents," Absorbents Products Conf., Nov. 16-17, 1983.

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