A device for the jellification/absorption of a water-based fluid, said device comprising a) at least one member comprising at least one absorption material and at least one jellifying agent, and b) at least one container, wherein the at least one jellifying agent is adapted to react with the water-based fluid to form a gel; wherein the at least one member is contained within the at least one container, and wherein the at least one container is made, at least in part, of a water-soluble material. A method for the manufacture of the device and a use of the device.

Provided is a water-absorbent resin capable of inhibiting backflow and leakage of a liquid absorbed by an absorbent body. When measured by a measurement method, this water-absorbent resin shows a repeated water absorption amount in an inclined state of 35 g or more. In the measurement method, 1.0 g of the water-absorbent resin is uniformly spread in a circular plastic petri dish having an inner diameter of 8.5 cm and a height of 1.7 cm. Subsequently, 30 g of physiological saline is supplied at once on the water-absorbent resin. Immediately thereafter, the petri dish is shaken 10 times from side to side and then allowed to stand for 3 minutes to form a swollen gel layer in which the physiological saline is absorbed by the water-absorbent resin. Separately, a device is prepared by fixing an acrylic plate having a flat main surface in such a manner that the main surface is at an angle of 30? to the horizontal plane. On the upper surface of the swollen gel layer, an air-through non-woven fabric, which has a weight per unit area of 21 g/m2 and cut into the same size as the inside of the petri dish, is placed. Then, the petri dish is stuck to the acrylic plate with tape to avoid slipping off. From a vertical height of approximately 1 cm at the center of the swollen gel layer in the petri dish, 5 g of the physiological saline is poured for 5 seconds using a macropipette. The pouring procedure is repeated 8 times at 1 minute intervals from the start of the physiological saline pouring. The amount of the liquid leaked from the petri dish is measured and subtracted from the amount (i.e., 40 g) of the poured physiological saline. The thus calculated mass of the physiological saline that is retained by the swollen gel layer is regarded as the repeated water absorption amount of the water-absorbent resin.

Porous sheet product and methods of making and using the same. In one embodiment, the porous sheet product may be made by a process that includes providing an extrusion mixture, the extrusion mixture including a polymeric binder, a swelling agent, a compatibilizing agent, and a superabsorbent polymer, the superabsorbent polymer being in particle form. The superabsorbent polymer may be wet-milled such that its particle size before and after milling is reduced by a ratio of at least 5:1. The extrusion mixture may be melt-extruded to form a sheet material in film form. At least a portion of the swelling and compatibilizing agents may be removed. The porous sheet product is preferably liquid permeable and may be used, for example, as a battery separator, as a food packaging material, as a diffusion barrier and disposable garments.

A production method includes a surface-crosslinking step of heating a mixture of a surface-crosslinking agent and a particulate dried polymer obtained with an acid group-containing unsaturated monomer as a main component. A moisture content of the particulate dried polymer is not greater than 15% by mass. A heating device including a rotary container and a plurality of heating tubes that are located within the rotary container, extend in an axial direction of the rotary container, and rotate together with the rotary container, is used in the surface-crosslinking step. The heating device includes a means for introducing and discharging a gas into and from the rotary container.

An absorbent article comprising an absorbent member positioned between a topsheet and a backsheet is provided. The absorbent member contains at least one layer that comprises superabsorbent particles containing nanopores having an average cross-sectional dimension of from about 10 to about 500 nanometers.

The present invention relates to a superabsorbent polymer composition. Since the superabsorbent polymer composition comprises aluminosilicate particles capable of effectively adsorbing and decreasing compounds inducing odor in sanitary products such as a diaper, etc. without deterioration of the properties of superabsorbent polymer such as centrifugal retention capacity, absorbency under load, and penetration, and does not induce caking, it can be usefully used in sanitary products, etc.

Disclosed is water-absorbent resin particles including: a crosslinked polymer having a monomer unit derived from an ethylenically unsaturated monomer including at least one compound selected from the group consisting of (meth)acrylic acid and a salt thereof, in which a proportion of (meth)acrylic acid and a salt thereof is 70 to 100 mol % with respect to a total amount of monomer units in the crosslinked polymer, an artificial urine permeation speed when the water-absorbent resin particles are swollen tenfold is 1.0 g/min or more and 35.0 g/min or less, a water retention capacity for a physiological saline solution is 32 to 60 g/g, and a contact angle measured in a test performed in the order of i) and ii) is 70 degrees or smaller.

The present invention relates to an absorber containing an absorber core having water-absorbent resin particles, in which a diffusion area change ratio measured in the order of (1) to (5) is 0.80 to 1.0.

An folded absorbent sanitary pad having a higher basis weight of superabsorbent polymer in correspondence with the folding lines which helps reducing the risk of side leakage.

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).