An absorber 10 contains water-absorbent resin particles 10a and a fibrous substance, a medium particle diameter of the water-absorbent resin particles 10a is 250 to 600 μm, the water-absorbent resin particles 10a contain small-diameter particles having a particle diameter of 180 μm or less, and a falloff rate of a mixture of the small-diameter particles and the fibrous substance when the mixture is subjected to shaking treatment for 10 minutes is 20% by mass or less.

An absorbent article 100 includes an absorber 10, the absorber 10 contains water-absorbent resin particles 10a, and a swelling height of the water-absorbent resin particles 10a measured by the following procedures (1) to (6) is 10 mm or less.

(1) A container having a recess having a bottom area of 50 cm.sup.2 is disposed in a state where the recess is open in a vertical direction.

(2) 1.00 g of water-absorbent resin particles are disposed in the recess.

(3) A non woven fabric is disposed on the water-absorbent resin particles in the recess.

(4) A weight having a mass of 90 g is disposed on the non-woven fabric.

(5) Physiological saline is supplied into the recess.

(6) A movement distance in a vertical direction of the weight when 300 seconds have passed from the start of swelling of the water-absorbent resin particles is measured as the swelling height.

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.

Water-absorbing resin particles, in which a value of non-pressurization DW after 30 seconds is 1.0 mL/g or more, and a contact angle measured in a test performed in the order of i) and ii) below is 90 degrees or smaller, are disclosed. i) A spherical liquid droplet, which corresponds to a diameter of 3.0±0.1 min, of a 25% by mass saline solution is added dropwise at 25° C. onto a surface of a layer formed from the water-absorbing resin particles to bring the water-absorbing resin particles into contact with the liquid droplet. ii) A contact angle of the liquid droplet is measured at a timing which is 30 seconds after the liquid droplet is brought into contact with the surface.

Water-absorbing resin particles, in which a permeation and spreading index represented by Formula (1) is 10.0 or higher, and a water absorption capacity for a physiological saline solution is 50.0 g/g or more, are disclosed.

Formula (1):

Permeation and spreading index=value of non-pressurization DW after 1 minute (mL/g)+artificial urine permeation speed when water-absorbing resin particles are swollen 10 times (g/min)  (1)

Water-absorbing resin particles, in which a light transmittance at a wavelength of 425 nm when the water-absorbing resin particles are swollen 30 times with a physiological saline solution is 20% or more, are disclosed.

[Problem] To provide an absorbent article further suppressing occurrence of malodor after absorbing body fluid.

[Solution] An absorbent article comprising a liquid permeable top sheet disposed on a skin surface side, a liquid impermeable back sheet disposed on an external surface side, and an absorbent body disposed between the top sheet and the back sheet, wherein the absorbent body has a water absorbent layer including a water absorbent resin powder, fumaric acid is disposed at a position being able to be in contact with body fluid absorbed in the absorbent article, and a polyphenol compound is disposed closer to the skin surface side than the back sheet.

Provided is a method for producing an absorbent article comprising a water-absorbing resin having an excellent initial water absorption speed under load even substantially without adding a liquid permeability enhancer.

The method steps for producing the water-absorbing resin includes the step of polymerizing a monomer while adding certain polyalkylene glycol thereto so as to generate, during or after the polymerization, a crosslinked hydrogel polymer containing the polyalkylene glycol of a specific molecular weight, wherein the crosslinked hydrogel polymer has a centrifuge retention capacity within a given range and a final water-absorbing resin to be obtained has various physical properties (CRC, AAP, SFC, FSR) being within given ranges.

The present disclosure relates to fluid absorbent cores including at least one absorption layer, the layer including at least 80% by weight of water-absorbent polymer particles, 0 to 10% by weight of an adhesive and from 0 to 10% by weight of fibrous material, wherein the water-absorbent polymer particles within the absorption layer are water-absorbent polymer particles having a vortex of 40 s or less and having a roundness of 0.79 to 0.85 and/or a CRC of 38 g/g to 85 g/g.

An absorbent article includes an absorber having a front surface side sheet, a back surface side sheet disposed on the back surface side of the front surface side sheet, cells each of which is surrounded by bonded portions of the front surface side sheet and the back surface side sheet and inside each of which the front surface side sheet and the back surface side sheet are not bonded, and particulate materials which include superabsorbent polymer particles and which are contained in each of the cells. The bonded portions are arranged in continuous line shapes or dotted line shapes so as to form same-sized regular hexagons, which connect each other as unit shapes to be a honeycomb shape. All the cells are the same-sized regular hexagonal cells each of which is surrounded by the bonded portions.