Title:
水分散性シート
Document Type and Number:
Japanese Patent JP6789311
Kind Code:
B2
Abstract:
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 %.
Inventors:
Masaki Kishimoto
Yoshiaki Ishino
Matsumori Yasuaki
Yoshiaki Ishino
Matsumori Yasuaki
Application Number:
JP2018550110A
Publication Date:
November 25, 2020
Filing Date:
October 23, 2017
Export Citation:
Assignee:
Nippon Paper Papylia Co., Ltd.
NIPPON PAPER INDUSTRIES CO.,LTD.
NIPPON PAPER INDUSTRIES CO.,LTD.
International Classes:
D21H13/04; B32B27/10; C09J7/21; D21H27/00; D21H27/30
Domestic Patent References:
| JP2006299498A | ||||
| JP9121939A | ||||
| JP2012214937A | ||||
| JP2016003419A |
Foreign References:
| US20140318726 |
Attorney, Agent or Firm:
Akira Shimoda
Kenichiro Akao
Kazuhiko Kurihara
Kenichiro Akao
Kazuhiko Kurihara