Water resistant communications cable

Details Water resistant communications cable Water resistant communications cable

1987-10-30

1989-03-28

Sikes, William L.

Electricity: conductors and insulators

Feedthrough or bushing

Compression

174 23C, G02B 644

Patent

active

048158135

ABSTRACT:
A communications cable comprising a core of at least one transmission media and a plastic jacket includes provisions for preventing the movement of water within the cable. A water blockable yarn (33) or strip (35) is interposed between the core and the jacket (32) and extends either linearly along the cable or is wrapped helically about a portion of the sheath system. In any plane along the cable which is transverse to the longitudinal axis of the cable, the yarn or the strip extends about an insubstantial portion of an inner periphery of the cable. As a result, any desired bond between the jacket and an underlying element of the cable sheath system is discontinuous for only an insignificant portion of the peripheral surface of contact. The yarn may be one which has been treated with a superabsorbent material whereas the strip may comprise a substrate strip which has been impregnated with a superabsorbent material which upon contact with water swells and inhibits the movement of water within the cable.

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An article entitled: "A Newly Developed Water-Blocking Fiber Optic Cable" by N. Nirasawa et al, Sumutomo Electric Technical Review-vol. No. 26, Jan. 1987.
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