US 12,239,517 B2
Absorbent article with main and auxiliary absorption layers
Mizuki Ri, Ehime (JP)
Assigned to Daio Paper Corporation, Ehime (JP)
Appl. No. 17/632,170
Filed by DAIO PAPER CORPORATION, Ehime (JP)
PCT Filed Sep. 17, 2020, PCT No. PCT/JP2020/035217
§ 371(c)(1), (2) Date Feb. 1, 2022,
PCT Pub. No. WO2021/060130, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 2019-176970 (JP), filed on Sep. 27, 2019.
Prior Publication US 2022/0280358 A1, Sep. 8, 2022
Int. Cl. A61F 13/537 (2006.01); A61F 13/15 (2006.01); A61F 13/53 (2006.01); A61F 13/534 (2006.01)
CPC A61F 13/53708 (2013.01) [A61F 13/15203 (2013.01); A61F 2013/1513 (2013.01); A61F 2013/15471 (2013.01); A61F 2013/530036 (2013.01); A61F 2013/530153 (2013.01); A61F 2013/530386 (2013.01); A61F 2013/530547 (2013.01); A61F 2013/5349 (2013.01)] 8 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, and
the upper auxiliary layer includes a super absorbent nonwoven fabric having a surface exposed to an uppermost surface of the absorber and having a Klemm water absorptiveness of 100 mm or more;
the main absorption layer is a cell absorbing sheet including:
a liquid pervious upper sheet and a liquid pervious lower sheet,
a middle sheet made of a nonwoven fabric interposed between the upper sheet and the lower sheet;
a plurality of cells arranged at intervals and surrounded by bonded portions of the upper sheet and the lower sheet in which the upper sheet and the lower sheet are not bonded to each other, and
a particulate material comprising main layer super absorbent polymer particles contained in the cells,
by embossing, a concave that is recessed to the outside of the cell is formed in a portion located at each cell in the upper sheet,
the middle sheet is compressed in a thickness direction at a portion located at the bonded portion and bulges up so as to enter the inside of the concave at a portion located in the cell,
a surface of the middle sheet facing the concave is in contact with an internal surface of the concave or a separation distance of thereof is 30% or less of the depth of the concave, and
the main layer super absorbent polymer particles are pressed against the upper sheet by the middle sheet.