US 12,465,532 B2
Underpants-type disposable wearing article
Hiroki Arai, Tochigi (JP)
Assigned to Daio Paper Corporation, Ehime (JP)
Appl. No. 17/997,970
Filed by DAIO PAPER CORPORATION, Shikokuchuo (JP)
PCT Filed May 25, 2021, PCT No. PCT/JP2021/019763
§ 371(c)(1), (2) Date Apr. 13, 2023,
PCT Pub. No. WO2022/004195, PCT Pub. Date Jan. 6, 2022.
Claims priority of application No. 2020-115703 (JP), filed on Jul. 3, 2020.
Prior Publication US 2023/0248587 A1, Aug. 10, 2023
Int. Cl. A61F 13/496 (2006.01)
CPC A61F 13/4963 (2013.01) 7 Claims
OG exemplary drawing
 
1. An underpants-type disposable wearing article, comprising:
a front body section and a back body section,
opposed side seals formed by joining the front body section and the back body section together along opposed lateral portions by means of melt-bonding,
a waist zone cylindrically continuous via the side seals,
a waist opening, which is an opening on a waist side of the waist zone, and
a pair of right and left leg openings located closer to legs than the waist zone,
wherein the front body section and the back body section are formed by bonding a plurality of sheet layers,
each side seal and area adjacent on a central side in a width direction thereof have at least one stacked sheet number change part where a number of stacked sheets varies from a waist opening side toward a leg openings side,
wherein a cut extending longitudinally across the at least one stacked sheet number change part is formed adjacent on the central side in the width direction of each side seal in the sheet layers forming at least either the front body section or the back body section, and
wherein the disposable article is free of a perforated line intended for splitting from the waist opening to a leg opening.