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Title:
WATER DISPERSING SHEET
Document Type and Number:
WIPO Patent Application WO/2018/088179
Kind Code:
A1
Abstract:
The present invention provides a water dispersing sheet for suppressing degradation over time of adhesion of an adhesive layer while maintaining water dispersion properties. A base paper for a water dispersing sheet is given a multilayer structure, and each of a layer (surface layer) in contact with an adhesive layer and a layer (inner layer) not in contact therewith comprises a mixture of alkalinized fibrous carboxymethylcellulose and fibers for papermaking with the ratio thereof and the freeness of the fibers for papermaking set in a specific range. The water dispersing sheet has an adhesive agent layer on one surface layer (first surface layer) of paper base material formed from the inner layer and at least one surface layer, said water dispersing sheet being configured such that the inner layer is formed from fibers for papermaking for which the Canadian Standard freeness is 600 – 750 ml CSF and alkalinized fibrous carboxymethylcellulose, the surface layer is formed from fibers for papermaking for which the Canadian Standard freeness is 400 – 575 ml CSF and alkalinized fibrous carboxymethylcellulose, and the content of the fibers for papermaking in the first surface layer is 60 – 90% by mass.

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Inventors:
KISHIMOTO MASAKI (JP)
ISHINO YOSHIAKI (JP)
MATSUMORI YASUAKI (JP)
Application Number:
PCT/JP2017/038133
Publication Date:
May 17, 2018
Filing Date:
October 23, 2017
Export Citation:
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Assignee:
NIPPON PAPER PAPYLIA CO LTD (JP)
JUJO PAPER CO LTD (JP)
International Classes:
D21H13/06; B41M5/41; D21H19/12; D21H27/00
Foreign References:
JP2006299498A2006-11-02
JPH09121939A1997-05-13
JP2012214937A2012-11-08
JP2016003419A2016-01-12
US20140318726A12014-10-30
JPH0949188A1997-02-18
JP2004314623A2004-11-11
JP2006299498A2006-11-02
JPH04370300A1992-12-22
Other References:
See also references of EP 3540121A4
Attorney, Agent or Firm:
SHIMODA Akira et al. (JP)
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