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AssigneeNeptco Incorporated
InventorsJoel David Gruhn, Phillip Douglas Shows, Stuart P. Fairgrieve, Jennifer Clare Watts
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A process for the manufacture of a nonwoven water blocking tape for use in cable manufacture, which process comprises the steps of: (i) forming a coating of an aqueous solution of a water soluble polymer containing anionic groups and a multivalent ionic crosslinking agent on at least one surface of a nonwoven substrate material; and (ii) drying and/or curing the coating in order to form a partially crosslinked water swellable polymer coating on the at least one surface of the nonwoven substrate material. Water blocking tapes are also provided which comprise a nonwoven substrate material having a coating on at least one surface thereof of a water soluble polymer containing anionic groups which is partially crosslinked with a multivalent ionic crosslinking agent.
A nonwoven water blocking tape for use in cable manufacture which comprises a nonwoven substrate having at least one surface with a coating of a water soluble polymer comprising an acrylic or methacrylic acid homopolymer containing anionic groups which is partially crosslinked with a multivalent ionic crosslinking agent.
A nonwoven water blocking tape for use in cable manufacture which comprises a nonwoven substrate having at least one surface with a coating of a water soluble polymer comprising an acrylic or methacrylic acid homopolymer containing anionic groups which is partially crosslinked with a multivalent ionic crosslinking agent, said polymer being prepared by a process comprising the steps of:
Dependencies are inferred from the claim text.