Powdered telephone cable filling compound

Details Powdered telephone cable filling compound Powdered telephone cable filling compound

H - Electricity

01

B

31/96

H01B 1/04 (2006.01) H01B 7/288 (2006.01)

Patent

CA 1079512

ABSTRACT OF THE DISCLOSURE The present specification discloses a composition in powdered form, suitable for filling the interstices between the conductors and the outer sheath of telecommunications cables, which comprises (1) from about 80% - 99% by weight of a pulverulent material having a high water absorption capacity, and more particularly, between about 30% and about 70% by weight of a finely divided cellulosic material, e.g. wood flour, and from 29% to about 75% by weight of gypsum in powdered form; and (2) from about 1% to about 20 by weight of a water modifying and immobilizing material, preferably a cellulose ether such as hydroxypropyl methylcellulose. Desirably the composition also contains a small amount of a bactericidal and/or fungicidal agent such as zinc oxide. The composition is highly effective in substantially preventing the passage of water along the length of the cable in the event of a break in the sheath permitting water to enter; it does not require the use of grease-like materials, and is made up of inexpensive, readily available materials.

316343

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