WATER-DISPERSIBLE SHEET

Number of patents in Portfolio can not be more than 2000

United States of America Patent

APP PUB NO 20190270328A1
SERIAL NO

16348426

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The present invention provides a water-dispersible sheet with a suppressed time degradation of the tacky adhesiveness of the tacky adhesive layer, while maintaining the water dispersibility. The base paper of the water-dispersible sheet has a multilayer structure, and one of the multilayer (inner layer) which is not in contact with a tacky adhesive layer and the other layer (surface layer) which is in contact with the tacky adhesive layer are independently mixtures of papermaking fibers and an alkalized fibrous carboxymethyl cellulose, wherein the ratio of these and the beating degree are set in the specific ranges in the present invention. Provided is a water-dispersible sheet having a tacky adhesive layer on a surface layer (first surface layer) of a paper substrate comprising an inner layer and at least one surface layer, wherein the inner layer comprises papermaking fibers with a Canadian standard freeness of from 600 to 750 ml CSF and an alkalized fibrous carboxymethyl cellulose, and the surface layer comprises papermaking fibers and an alkalized fibrous carboxymethyl cellulose, wherein the Canadian standard freeness of the papermaking fibers in the first surface layer is 400 to 575 ml CSF and the content of the papermaking fibers in the first surface layer is 60 to 90 weight %.

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Patent Owner(s)

Patent OwnerAddress
NIPPON PAPER INDUSTRIES CO LTDTOKYO JAPAN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
ISHINO, Yoshiaki Tokyo, JP 12 130
KISHIMOTO, Masaki Tokyo, JP 16 131
Matsumori, Yasuaki Tokyo, JP 6 16

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