Method for manufacturing tissue paper and method for manufacturing tissue paper product

Patent metadata

Field	Value
Publication number	US-2023366156-A1
Application number	US-202118248047-A
Country	US
Kind code	A1
Filing date	Oct 4, 2021
Priority date	Oct 6, 2020
Publication date	Nov 16, 2023
Grant date	—

Abstract

To provide a method for manufacturing three-ply or four-ply tissue paper that reduces a sticky feeling of an outer surface while securing necessary softness. In manufacturing tissue paper including a stacked sheet in which three plies or four plies are stacked, each of the plies contains an aqueous moisturizer exhibiting hygroscopicity, and each of the plies has a difference in magnitude of an arithmetic mean height Sa according to ISO 25718 between both surfaces of each of the plies. A manufacturing method includes: applying the moisturizer to each of the plies such that the moisturizer is applied to an outer surface of each of the plies located on an outer side of the stacked sheet in a state where the outer surface has a small value of the arithmetic mean height Sa; folding the stacked sheet in which the moisturizer has been applied to each of the plies; and then storing the stacked sheet in the storage body in a folded state.

First claim

1 . A method for manufacturing tissue paper including a stacked sheet in which three plies or four plies are stacked,
each of the plies containing an aqueous moisturizer exhibiting hygroscopicity, and each of the plies having a difference in magnitude of an arithmetic mean height Sa according to ISO 25718 between both surfaces of each of the plies,
the method comprising:
applying the moisturizer to each of the plies such that the moisturizer is applied to an outer surface of each of the plies located on an outer side of the stacked sheet in a state where the outer surface has a small value of the arithmetic mean height Sa; and
folding the stacked sheet in which the moisturizer has been applied to each of the plies.

2 . The method for manufacturing tissue paper according to claim 1 , wherein a content of the moisturizer in each of the plies is 10.0 to 35.0% by mass.

3 . The method for manufacturing tissue paper according to claim 1 , wherein the application is performed by a flexographic transfer printing method.

4 . A method for manufacturing a tissue paper product storing tissue paper including a stacked sheet in which three plies or four plies are stacked in a storage body,
each of the plies containing an aqueous moisturizer exhibiting hygroscopicity, and each of the plies having a difference in magnitude of an arithmetic mean height Sa according to ISO 25718 between both surfaces of each of the plies,
the method comprising:
applying the moisturizer to each of the plies by a flexographic transfer printing method such that the moisturizer is applied to an outer surface of each of the plies located on an outer side of the stacked sheet in a state where the outer surface has a small value of the arithmetic mean height Sa;
folding the stacked sheet in which the moisturizer has been applied to each of the plies; and
then storing the stacked sheet in the storage body in a folded state.

Assignees

• Daio Seishi Kk

Inventors

• Manabe Sadanao
• Ochi Ryoichi
• Shiinoki Yuusuke

Classifications

• D21H27/32 Primary

  with materials applied between the sheets (attaching together paper or cardboard sheets B31F5/00; adhesives C09J) · CPC title

• D21H23/50

  Spraying or projecting (D21H23/44, D21H23/66 take precedence) · CPC title

• D21H27/005

  relating to physical or mechanical properties, e.g. tensile strength, stretch, softness · CPC title

• D21H27/30 Primary

  Multi-ply (for surface covering D21H27/18; making on paper-making machines D21F9/00, D21F11/00) · CPC title

• D21H27/002

  Tissue paper; Absorbent paper (D21H21/22, D21H27/02, D21H27/20 take precedence; toilet paper A47K10/00; absorbent pads for physiological fluids A61L15/16; making on paper-making machines D21F11/00) · CPC title