US 12,186,171 B2
Elastic sheet, underpants-type absorbent article, and method for manufacturing elastic sheet
Toshifumi Ohtsubo, Kagawa (JP); Hirotomo Mukai, Kagawa (JP); Takahito Nagai, Kagawa (JP); Chieri Akino, Kagawa (JP); and Satoshi Mizuno, Kagawa (JP)
Assigned to Unicharm Corporation, Ehime (JP)
Filed by UNICHARM CORPORATION, Ehime (JP)
Filed on Feb. 23, 2024, as Appl. No. 18/585,408.
Application 18/585,408 is a continuation of application No. PCT/JP2022/032874, filed on Aug. 31, 2022.
Claims priority of application No. 2021-141415 (JP), filed on Aug. 31, 2021.
Prior Publication US 2024/0189159 A1, Jun. 13, 2024
Int. Cl. A61F 13/15 (2006.01); A61F 13/49 (2006.01)
CPC A61F 13/49009 (2013.01) [A61F 13/15747 (2013.01); A61F 13/49 (2013.01); A61F 13/49015 (2013.01); A61F 13/4902 (2013.01); A61F 2013/4903 (2013.01); A61F 2013/49052 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A stretchable sheet comprising:
a first sheet;
a second sheet joined to the first sheet by welded portions; and
an elastic member that is disposed between the first sheet and the second sheet and stretches and contracts in a continuous direction in which the elastic member extends, wherein
the welded portions are disposed on both sides of the elastic member in an intersecting direction intersecting with the continuous direction,
welded portion pairs are disposed in which the elastic member is sandwiched and restrict a position of the elastic member in the intersecting direction with respect to the first sheet and the second sheet,
the elastic member has a damaged portion where a part of a surface of the elastic member is damaged,
the welded portion pairs include a first welded portion pair and a second welded portion pair that is disposed adjacent to the first welded portion pair in the continuous direction,
the damaged portion is disposed between the first welded portion pair and the second welded portion pair in the continuous direction.