Optical fiber cable preventing water from spreading toward cable

Details Optical fiber cable preventing water from spreading toward cable Optical fiber cable preventing water from spreading toward cable

1987-09-21

1989-02-07

Lee, John D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

350 9634, 523173, G02B 644

Patent

active

048027324

ABSTRACT:
Disclosed is an optical fiber cable which prevents water from running or spreading toward the cable interior. The optical fiber cable comprises at least one optical fiber unit, an outermost sheath member, and a water absorbing and swelling member. The optical fiber unit includes a central spacer formed with grooves, and at least one coated optical fiber or optical fiber tape disposed in each of the grooves. The outermost sheath member surrounds the optical fiber unit, and the water absorbing and swelling member is filled in spaces defined between the optical fiber unit and the outermost sheath member. The water absorbing and swelling member comprises a non-water absorbing and non-swelling base and water absorbing and swelling material fixed to a surface of the base. In another embodiment of the invention, the water absorbing and swelling member is in the form of a tape in which a layer of water absorbing and swelling material is bonded to one or both surfaces of a film like flexible base. The water absorbing and swelling tape member is disposed in grooves of the spacer together with optical fiber tapes.

REFERENCES:
patent: 4308416 (1981-12-01), Herman et al.
patent: 4388485 (1983-06-01), Zeidler et al.
patent: 4401366 (1983-08-01), Hope
patent: 4458105 (1984-07-01), Roenisch et al.
patent: 4525026 (1985-06-01), Elion
patent: 4703998 (1987-11-01), Uchioke et al.

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