US 12,134,862 B2
Toilet paper and method for producing toilet paper
Shuta Yasui, Shizuoka (JP); and Minoru Iwasaki, Shizuoka (JP)
Assigned to Daio Paper Corporation, Ehime (JP)
Appl. No. 17/442,696
Filed by Daio Paper Corporation, Ehime (JP)
PCT Filed Feb. 12, 2020, PCT No. PCT/JP2020/005223
§ 371(c)(1), (2) Date Sep. 24, 2021,
PCT Pub. No. WO2020/195259, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 2019-061937 (JP), filed on Mar. 27, 2019.
Prior Publication US 2024/0209576 A1, Jun. 27, 2024
Int. Cl. D21H 27/30 (2006.01); D21H 17/14 (2006.01); D21H 21/22 (2006.01); D21H 27/00 (2006.01)
CPC D21H 27/30 (2013.01) [D21H 17/14 (2013.01); D21H 21/22 (2013.01); D21H 27/004 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A 3-ply or 4-ply toilet paper, comprising:
softwood-derived pulp in an amount of 80% by mass or more of fibers; and
a cationic fatty acid amide-based softener,
wherein the toilet paper has concaves formed by embossing,
wherein the toilet paper is a 4-ply double embossment formed by 2-ply stacked single embossed sheet, or an embossment formed by combining a 2-ply stacked single embossed sheet and a 1-ply embossed sheet,
wherein an area of each concave is 1.0 to 2.5 mm2, a density of the concaves is 5.0 to 50 concaves per square centimeter of the toilet paper, and a depth of each emboss is 0.05 to 0.5 mm,
wherein each ply has a basis weight of 10.5 to 16.5 g/m2 per ply, and
wherein the toilet paper has a disintegration freeness of 550 cc or more as determined by disintegrating the toilet paper and measuring its freeness according to JIS P 8121-2:2012.