Superabsorbent particles have a median size of from about 50 to about 2,000 micrometers and contain a porous network that includes a plurality of nanopores having an average cross-sectional dimension of from about 10 to about 500 nanometers, wherein the superabsorbent particles exhibit a Vortex Time of about 80 seconds or less and a free swell gel bed permeability (GBP) of 5 darcys or more, of 10 darcys or more, of 20 darcys or more, of 30 darcys or more, of 60 darcys or more, or of 90 darcys or more. A method for forming such superabsorbent particles includes forming a composition that contains a superabsorbent polymer and a solvent system; contacting the composition with a non-solvent system to initiate formation of the porous network through phase inversion; removing non-solvent from the composition; and surface crosslinking the superabsorbent particles.

An absorbent article includes a topsheet comprising a composite sheet. In the composite sheet, projections that protrude toward the skin of the wearer are formed by a first sheet protruding in a direction away from a second sheet at portions other than bonding portions. A plurality of first oblique bonding portion rows and a plurality of second oblique bonding portion rows are formed, and a long bonding portion elongated in a longitudinal direction is formed at each intersection of the first oblique bonding portion rows and the second oblique bonding portion rows. Laterally long projections elongated in a width direction are formed in a dispersed manner in the longitudinal direction and the width direction. Each laterally long projection is surrounded by two first oblique bonding portion rows and two second oblique bonding portion rows, and the long bonding portion is formed between adjacent laterally long projections in the width direction.

An absorbent article includes an absorbent member positioned between a topsheet and a backsheet. The absorbent member contains at least one layer that includes superabsorbent particles containing a porous network that includes a plurality of nanopores having an average cross-sectional dimension of from about 10 to about 500 nanometers, wherein the superabsorbent particles exhibit a Vortex Time of about 80 seconds or less and a free swell gel bed permeability (GBP) of 5 darcys or more, of 10 darcys or more, of 60 darcys or more, or of 90 darcys or more.

The absorbent article includes a topsheet having a body contacting surface, a backsheet joined to said topsheet, and an absorbent core disposed between the topsheet and the backsheet, wherein the absorbent core has a first absorbent core having a first area and a second area, wherein the first absorbent core and the second absorbent core are vertically arranged, wherein the second absorbent core at least partially covers the second area of the first absorbent core, and wherein the first absorbent core and the second absorbent core have different compositions.

The absorbent article includes a topsheet having a body contacting surface, a backsheet joined to said topsheet, and an absorbent core disposed between the topsheet and the backsheet, wherein the absorbent core has a first absorbent core having a first area and a second area, wherein the first absorbent core and the second absorbent core are vertically arranged, wherein the second absorbent core at least partially covers the second area of the first absorbent core, and wherein the first absorbent core and the second absorbent core have different compositions.

Superabsorbent particles have a median size of from about 50 to about 2,000 micrometers and contain a porous network that includes a plurality of nanopores having an average cross-sectional dimension of from about 10 to about 500 nanometers, wherein the superabsorbent particles exhibit a Vortex Time of about 80 seconds or less and a free swell gel bed permeability (GBP) of 5 darcys or more, of 10 darcys or more, of 20 darcys or more, of 30 darcys or more, of 60 darcys or more, or of 90 darcys or more. A method for forming such superabsorbent particles includes forming a composition that contains a superabsorbent polymer and a solvent system; contacting the composition with a non-solvent system to initiate formation of the porous network through phase inversion; removing non-solvent from the composition; and surface crosslinking the superabsorbent particles.

The present invention provides a water-absorbing sheet suitable for a hygienic material such as a disposable diaper. The water-absorbing sheet in accordance with an aspect of the present invention includes: a first base material; a second base material; and a particulate water-absorbing agent sandwiched between the first base material and the second base material, at least one of the first base material and the second base material being a water-permeable base material, and at least part of the particulate water-absorbing agent satisfying the following physical properties (1), (2), and (3): (1) a centrifuge retention capacity (CRC) is 30 g/g to 50 g/g; (2) a mass average particle diameter (D50) is 200 m to 600 m; and (3) a DRC index defined by the following Formula (a) is 43 or less:

DRC index=(49DRC5 min)/(D50/1000) Formula (a).

The absorbent article includes a topsheet having a body contacting surface, a backsheet joined to said topsheet, and an absorbent core disposed between the topsheet and the backsheet, wherein the absorbent core has a first absorbent core having a first area and a second area, wherein the first absorbent core and the second absorbent core are vertically arranged, wherein the second absorbent core at least partially covers the second area of the first absorbent core, and wherein the first absorbent core and the second absorbent core have different compositions.

The absorbent article includes a topsheet having a body contacting surface, a backsheet joined to said topsheet, and an absorbent core disposed between the topsheet and the backsheet, wherein the absorbent core has a first absorbent core comprising a first area and a second area, wherein the first absorbent core and the second absorbent core are vertically arranged, wherein the second absorbent core at least partially covers the second area of the first absorbent core, and wherein the first absorbent core and the second absorbent core are different from each other at least in composition, density or absorption capacity thereof.

An absorbent article includes a topsheet comprising a composite sheet. In the composite sheet, projections that protrude toward the skin of the wearer are formed by a first sheet protruding in a direction away from a second sheet at portions other than bonding portions. A plurality of first oblique bonding portion rows and a plurality of second oblique bonding portion rows are formed, and a long bonding portion elongated in a longitudinal direction is formed at each intersection of the first oblique bonding portion rows and the second oblique bonding portion rows. Laterally long projections elongated in a width direction are formed in a dispersed manner in the longitudinal direction and the width direction. Each laterally long projection is surrounded by two first oblique bonding portion rows and two second oblique bonding portion rows, and the long bonding portion is formed between adjacent laterally long projections in the width direction.