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

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.

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.