US 12,186,172 B2
Absorbent article
Hiroki Matsuoka, Ehime (JP)
Assigned to Daio Paper Corporation, Ehime (JP)
Appl. No. 17/632,178
Filed by DAIO PAPER CORPORATION, Ehime (JP)
PCT Filed Sep. 8, 2020, PCT No. PCT/JP2020/033904
§ 371(c)(1), (2) Date Feb. 1, 2022,
PCT Pub. No. WO2021/059959, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 2019-176969 (JP), filed on Sep. 27, 2019.
Prior Publication US 2022/0280356 A1, Sep. 8, 2022
Int. Cl. A61F 13/15 (2006.01); A61F 13/532 (2006.01); A61F 13/535 (2006.01); A61F 13/536 (2006.01)
CPC A61F 13/535 (2013.01) [A61F 13/5323 (2013.01); A61F 13/536 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An absorbent article comprising: an absorber; and a liquid pervious top sheet disposed on a front surface side of the absorber, wherein
the absorber includes an upper auxiliary layer disposed on an uppermost portion and a main absorption layer disposed on a back surface side of the upper auxiliary layer,
the upper auxiliary layer includes a super absorbent nonwoven fabric having a surface exposed on an uppermost surface of the absorber and having a Klemm water absorptiveness of 100 mm or more, and first super absorbent polymer particles adjacent to a back surface of the super absorbent nonwoven fabric,
the main absorption layer is a cell absorbing sheet including a liquid pervious upper sheet and a lower sheet, cells which are portions surrounded by bonded portions of the upper sheet and the lower sheet and in which the upper sheet and the lower sheet are not bonded to each other, and a particulate material which contains second super absorbent polymer particles and which is contained in the cells,
the cells are arranged at intervals in the cell absorbing sheet,
a convex bulging upward is formed in a portion located at each cell in the upper sheet,
the first super absorbent polymer particles are fixed to the upper surface of the upper sheet of the main absorption layer, and
an adhesion amount of the first super absorbent polymer particles on the upper surface of the upper sheet increases from a top of the convex toward a bottom of a valley located between a convex and a convex adjacent each other.