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

1992-12-22

1995-04-25

Bovernick, Rodney B.

Optical waveguides

Optical transmission cable

Loose tube type

G02B 644

Patent

active

054106290

ABSTRACT:
The foregoing problems of the prior art have been overcome by cables of this invention. An optical fiber cable includes a core comprising at least one optical fiber transmission medium, a tubular member in which is disposed the core and which is made of a plastic material and a sheath system which is disposed about the tubular member. Additionally, a compositional blend is disposed in the tubular member and capable of performing dual functions by blocking the longitudinal flow of water as well as preventing freezing of water or moisture within the cable. Preferably, the composition includes a superabsorbent constituent blended with an antifreeze constituent, which is then disposed along one longitudinally extending member. In addition to being sprayed onto a tape or other longitudinal member, the compositional blend may also be electronically deposited directly onto the transmission matter, sheath system or core tube.

REFERENCES:
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patent: 4002819 (1977-01-01), Woytiuk
patent: 4176240 (1979-11-01), Sabia
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patent: 5138685 (1992-08-01), Arroyo et al.
patent: 5179611 (1993-01-01), Umeda et al.
Djock, et al., "Review of Synthetic and Starch-Graft Copolymer Superabsorbents," Absorbents Products Conf., Nov. 16-17, 1983.

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