Electricity: conductors and insulators – With fluids or vacuum – With fluid stops
Patent
1992-08-31
1994-04-26
Nimmo, Morris H.
Electricity: conductors and insulators
With fluids or vacuum
With fluid stops
174 23C, 523173, H01B 728
Patent
active
053068670
ABSTRACT:
A cable (20) includes a plurality of conductors (24) included in a core (22) enclosed in a sheath system. Voids between the conductors are filled by a mixture of a filling composition characterized by a styrene-rubber block copolymer having a styrene/rubber ratio of from 0.2 to 0.5, an ASTM Type 104A oil and polyethylene and a superabsorbent polymer material. The mixture has a viscosity in the range of about 400 cps at 88.degree. C. to 11 cps at 110.degree. C. and may be used to fill substantially voids in a cable comprising as many as 3000 pairs of insulated metallic conductors. The superabsorbent polymer is incorporated into the gel composition in a concentration of about 10 parts by weight to per 100 parts by weight of the filling mixture. A flooding material which comprises a mixture of a flooding composition and a superabsorbent polymer may be used to flood voids between layers of the sheath system.
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Pierce, D.; A Truly "Waterproof" Outside Plant Cable?; Outside Plant; May, 1992.
Connole Kent B.
Cuprak Richard S.
Grunewald Myles H.
Mitchell David M.
Pellicciotti Gabriel P.
AT&T Bell Laboratories
Hayes, Jr. Donald E.
Nimmo Morris H.
Somers Edward W.
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