A disposable undergarment is disclosed. The undergarment includes a chassis and an absorbent core assembly. The chassis includes a front section, a crotch section and a rear section. The absorbent core is located in the crotch section, with portions of it extending into the front and rear sections. A large plurality of closely spaced elastic threads extends across the full width of the undergarment in the front and rear sections. A large plurality of closely spaced elastic threads extends across the full width of the undergarment in portions of the crotch section adjacent the front and rear sections. The elastic threads are broken in the areas of the core assembly. The core assembly includes a first section of a slow acting but high absorbency SAP in pockets thereof and an underlying second section of a fast acting by lower absorbency SAP in pockets thereof.

An absorbent article comprising a liquid pervious topsheet, a liquid impervious backsheet, and an absorbent structure positioned in between said topsheet and said backsheet, wherein the absorbent structure comprises an absorbent core positioned in between the topsheet and the backsheet, a release structure being positioned in fluid communication with the absorbent core, said absorbent core comprising little to no cellulose fibers and/or fluff pulp and said absorbent core comprising an absorbent polymer material for absorbing and permanently holding fluids received from the topsheet and the release structure, wherein said release structure comprises at least one fibrous substrate structure having the capacity to receive and temporarily hold the fluids in proximity to the absorbent core so that the fluids can subsequently be transferred and released to and absorbed by the absorbent core.

Disclosed is an absorbent article including an absorbent member arranged between a topsheet and backsheet, the absorbent member having a front edge and a rear edge, the absorbent member including a first absorbent layer having a first layer front edge and a first layer rear edge and a second layer, the first absorbent layer being shorter than the second layer, wherein the first and the second layers include super absorbent polymer particles, wherein the absorbent member is provided with at least two channels extending in a longitudinal direction and on a respective side of a longitudinal centerline of the absorbent article, the first layer including a higher amount of superabsorbent polymer particles than the second absorbent layer, the absorbent member having a total absorbent capacity of 1100 ml or more, wherein a ratio between the front edge distance and the rear edge distance is 1.5 or greater.

Disclosed is water-absorbent resin particles, in which a value of non-pressurization DW after 3 minutes is 14 ml/g or more, and a value of liquid suction power after 3 minutes measured by the following method is 11 ml/g or more. A liquid suction power measurement method: 0.3 g of the water-absorbent resin particles is uniformly dispersed in a cylindrical container having a mesh-like bottom and having an inner diameter of 26 mm; the cylindrical container is placed in a container containing 40 g of a physiological saline solution, the water-absorbent resin particles are caused to absorb the physiological saline solution for 30 minutes from the bottom of the cylindrical container, and thereby a swollen gel is obtained; and non-pressurization DW, which is measured in a state where another 0.3 g of the water-absorbent resin particles is uniformly dispersed on the swollen gel in the cylindrical container, is defined as liquid suction power.

The present invention provides for an absorbent article that includes a topsheet, backsheet and absorbent core. The absorbent core includes a fibrous material and a particulate superabsorbent polymer composition. The superabsorbent polymer composition exhibits advantageous performance of absorption rate, surface tension, bulk density, centrifuge retention capacity, absorbency under load, gel bed permeability and particle size.

An absorber 10 containing water-absorbent resin particles 10a, in which a rate of an amount of change in a water retention amount of physiological saline of the water-absorbent resin particles 10a when the water-absorbent resin particles 10a are irradiated with an ultraviolet ray for 3 hours with respect to a water retention amount of the water-absorbent resin particles 10a of physiological saline before irradiation with an ultraviolet ray is more than 0% and 30% or less.

A water-absorbent resin that can reduce the amount of backflow of an absorbed liquid even when the water-absorbent resin is used at a low content in an absorbent material is provided. An absorbent article comprising an absorbent material containing the resin is also provided. The resin is a crosslinked polymer of a water-soluble ethylenically unsaturated monomer and has a dry-up index of 1.85 or more, as represented by equation (1):

dry-up index=overall absorption capacity term α×water absorption rate term β  (1)

where the overall absorption capacity term α and the water absorption rate term β are determined according to equations (2) and (3):

[00001]$ overall ⁢ ⁢ absorption ⁢ ⁢ capacity ⁢ ⁢ term ⁢ ⁢ α = ( physiological ⁢ ⁢ saline ⁢ ⁢ absorption ⁢ capacity ⁢ ⁢ under ⁢ ⁢ a ⁢ ⁢ load ⁢ ⁢ of ⁢ ⁢ 2.07 ⁢ ⁢ kPa - physiological ⁢ ⁢ saline ⁢ ⁢ abs WATER ABSORBENT RESIN PARTICLES AND ABSORBENT ARTICLE 20220015958 · 2022-01-20 · Takashi ITO 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-ABSORBENT RESIN PARTICLES, WATER-ABSORBENT ARTICLE, AND METHOD FOR MANUFACTURING SAME 20220015959 · 2022-01-20 · Hiroki YABUGUCHI 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-ABSORBENT RESIN PARTICLES, ABSORBER, AND ABSORBENT ARTICLE 20220015957 · 2022-01-20 · Moe NISHIDA An absorbent article 100 includes an absorber 10, the absorber 10 contains water-absorbent resin particles 10a, and a standard deviation between a water retention amount of 0.01% by mass sodium salt aqueous solution, a water retention amount of 0.01% by mass potassium salt aqueous solution, a water retention amount of 0.01% by mass magnesium salt aqueous solution, and a water retention amount of 0.01% by mass calcium salt aqueous solution in the water-absorbent resin particles 10a is 20 g/g or less. $