The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 16, 2023
Filed:
Aug. 15, 2018
Nippon Paper Papylia Co., Ltd., Shizuoka, JP;
Nippon Paper Industries Co., Ltd., Tokyo, JP;
Masaki Kishimoto, Tokyo, JP;
Yoshiaki Ishino, Tokyo, JP;
Yasuaki Matsumori, Tokyo, JP;
Eiji Kusano, Tokyo, JP;
Kento Aoshima, Tokyo, JP;
Kazuyo Wadagami, Tokyo, JP;
Kumiko Katsumata, Tokyo, JP;
NIPPON PAPER PAPYLIA CO., LTD., Shizuoka, JP;
Nippon Paper Industries Co., Ltd., Tokyo, JP;
Abstract
A water-dispersible sheet is described that maintains water dispersibility while providing suppressed time degradation of the tacky adhesiveness of a tacky adhesive layer. The water-dispersible sheet has a paper substrate with a multilayer structure. One layer of the multilayer structure is an inner layer that is not in contact with the tacky adhesive layer. Another layer is a surface layer that is in contact with the tacky adhesive layer. The layers independently include mixed pulps of a wood pulp and a refined pulp with an α-cellulose content of 88 % by weight or more. The weight ratio of the layers and the beating degree of the mixed pulps are set in the specific ranges.