Patent ID: 11969327
Assignee: UNICHARM CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. An absorbent article which includes a liquid permeable sheet, an absorbent core that has superabsorbent polymers for absorbing body fluid, and a liquid impermeable sheet, wherein
the absorbent core is sandwiched between the liquid impermeable sheet and the liquid permeable sheet,
the absorbent article includes a longitudinal direction that has a front side and a rear side, a width direction, and a thickness direction, and is partitioned into a front body and a rear body,
the absorbent core includes a first layer and a second layer which are adjacent to each other in the thickness direction,
the first layer includes the superabsorbent polymers, and further includes (i) a groove portion which extends along the longitudinal direction, penetrates in the thickness direction, and includes a terminal edge at a position on the rear side, and (ii) a base portion which is arranged adjacent to the position on the rear side of the groove portion with the terminal edge placed in between, the groove portion and the base portion being arranged at the front body,
the second layer includes the superabsorbent polymers, and further includes a groove portion corresponding portion and a base portion corresponding portion at positions which overlap with the groove portion and the base portion in the thickness direction, respectively,
the superabsorbent particles of the second layer are distinct from the superabsorbent polymers of the first layer and each of an average density of the superabsorbent polymers included in substantially all of the base portion and an average density of the superabsorbent polymers included in substantially all of the base portion corresponding portion is larger than an average density of the superabsorbent polymers included in the groove portion corresponding portion, and
an average density of the superabsorbent polymers included in the first layer is smaller than an average density of the superabsorbent polymers included in the second layer such that a first layer average flow velocity of the body fluid passing through the first layer is greater than a second layer average flow velocity of the body fluid passing through the second layer.