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US 11,802,378 B2Granted
Water-dispersible paper
AssigneeNippon Paper Papylia Co., Ltd.
InventorsMasaki Kishimoto, Yoshiaki Ishino
Life of this patent
Estimating the term…
Abstract
An object is to provide a water-dispersible paper that exhibits excellent dispersibility in water. As a solution, a water-dispersible paper is provided, which has: a base paper that has a bulky layer containing 10% by weight or higher of a softwood pulp with a lumen width (l) to fiber diameter (D) ratio (l/D) of 0.60 or lower on average; and a water-soluble polymer impregnated into the base paper.
Claims20
A water-dispersible paper characterized by comprising:
- a base paper that has a bulky layer containing, relative to a total amount of pulp contained in the bulky layer, 10% by weight or higher of a softwood pulp constituted by pulp fibers with a lumen width (l) to fiber diameter (D) ratio (l/D) of 0.60 or lower on average, and a dense layer which is denser than the bulky layer wherein the dense layer and bulky layer are not formed from a same paper material;
- and
- a water-soluble polymer impregnated into the base paper.
Dependencies are inferred from the claim text.