US 12,403,046 B2
Disposable wearing article
Takeshi Minami, Tochigi (JP)
Assigned to Daio Paper Corporation, Ehime (JP)
Appl. No. 18/016,405
Filed by DAIO PAPER CORPORATION, Ehime (JP)
PCT Filed Jun. 3, 2021, PCT No. PCT/JP2021/021253
§ 371(c)(1), (2) Date Jan. 16, 2023,
PCT Pub. No. WO2022/034729, PCT Pub. Date Feb. 17, 2022.
Claims priority of application No. 2020-135901 (JP), filed on Aug. 11, 2020.
Prior Publication US 2023/0310228 A1, Oct. 5, 2023
Int. Cl. A61F 13/49 (2006.01); A61F 13/496 (2006.01)
CPC A61F 13/4902 (2013.01) [A61F 13/496 (2013.01); A61F 2013/49022 (2013.01); A61F 2013/49031 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A disposable wearing article comprising:
a waist portion having an outer side portion exposed on an external surface and an inner side portion overlapped with an inner side of the outer side portion;
a waist adjacent portion continuing extending from the outer side portion of the waist portion toward a crotch side;
an outer side stretchable region extending over the outer side portion of the waist portion and the waist adjacent portion; and
an inner side stretchable region provided in the inner side portion of the waist portion,
wherein the outer side stretchable region has
a first sheet layer made of a nonwoven fabric,
a second sheet layer made of a nonwoven fabric, and
an outer side elastic film being interposed therebetween and extending over the outer side portion of the waist portion and the waist adjacent portion,
the first sheet layer and the second sheet layer are welded through joint holes penetrating the outer side elastic film at sheet joined portions arranged at intervals,
the outer side stretchable region contracts in a width direction by contraction of the outer side elastic film and is extensible in the width direction,
the inner side stretchable region includes an inner side elastic member,
the inner side stretchable region contracts in the width direction by contraction of the inner side elastic member and is extensible in the width direction,
the outer side portion and the inner side portion are joined with each other in a stripe pattern formed by disposing, alternately and repeatedly in the width direction, inner/outer bonded portions continuous in a front-back direction and inner/outer non-bonded portions continuous in the front-back direction, and
a natural length in the width direction of the outer side portion is 1.1 to 1.8 times a natural length in the width direction of the inner side portion.