Swellable cable wrapping and process for producing same

Details Swellable cable wrapping and process for producing same Swellable cable wrapping and process for producing same

H - Electricity

01

B

26/129, 337/67

H01B 7/28 (2006.01) D04H 1/58 (2006.01) H01B 3/32 (2006.01) H01B 3/50 (2006.01) H01B 7/288 (2006.01)

Patent

CA 1287135

ABSTRACT Disclosed is a swellable nonwoven fabric strip for a cable wrapping having a specific resistance of 3000 .OMEGA. cm2 or less and a method for its manufacture. The strip is in the form of a fibrous flat material without perceptible layered construction, wherein the fibers are aligned mainly lengthwise of the strip and are 95 to 75 wt.-% in the form of viscose fibers and 5 to 25 wt.-% in the form of shrunken polyvinylalcohol fibers soluble in water beginning at 80°C. The flat material is uniformly impregnated with a binding agent which under the action of water loses its ability to adhere. The strip contains swelling powder particles which swell upon the access of water but do not dissolve, the swelling agent being distributed in an amount of 20 to 40 g/m2 . The strip is capable of swelling at the place of access of the water to at least 90% of its achievable thickness in approximately one minute.

552167

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