Absorbent, absorbing product based thereon, and water-absorbing resin
AssigneeNippon Shokubai Co., Ltd.
InventorsKatsuyuki Wada, Naoko Takahashi, Kunihiko Ishizaki
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Abstract
The absorbent in accordance with the present invention is limited in at least two of the following requirements: ventilation resistance, absorbency under no load and/or under load, weight mean particle diameter, and water-soluble components. The absorbent exhibits a 24 g/g or more absorbency under a 2.0 kPa load and a 50 kPa·sec/m or less ventilation resistance under a 4.9 kPa load in a wet state. The absorbing product in accordance with the present invention is based on this absorbent and therefore exhibits improved ventilating properties when worn and relatively little wet back of water-based liquids, providing a further improved sense of comfort to users wearing the absorbing product.
Claims19
An absorbent of a sheet shape or a substantially cylindrical shape containing a water-absorbing resin and a fabric material, having a 24 g/g or more absorbency after 60 minutes under a 2.0 kPa load to physiological salt solution having 0.9 percent by weight of a sodium chloride aqueous solution at 23° C., and a 50 kPa·sec/m or less ventilation resistance under a 4.9 kPa load in a wet state to physiological salt solution.
A water-absorbing resin having a 250 kPa·sec/m or less ventilation resistance under a 4.9 kPa load in a wet state, a 32 g/g or more absorbency under no load to physiological salt solution and a 32 g/g or more absorbency under a 2.0 kPa load to physiological salt solution, and being shaped in particles with the weighted average of the diameters of resin particles being 430 μm or more.
A water-absorbing resin, having a 250 kPa·sec/m or less ventilation resistance under a 4.9 kPa load in a wet state and a 34 g/g or more absorbency under no load to physiological salt solution, and comprising 18 percent by weight or less water-soluble components.
A water-absorbing resin, having a 250 kPa·sec/m or less ventilation resistance under a 4.9 kPa load in a wet state and a 34 g/g or more absorbency under a 2.0 kPa load to physiological salt solution, and comprising 18 percent by weight or less water-soluble components.
A water-absorbing resin which is produced by crosslinking a surface of water-absorbing resin precursor which contains, per 100 g, 0.01 or more equivalent amount of carboxyl groups which form a hydro gel,
- the water-absorbing resin being provided in particulate forms with a 250 kPa·sec/m or less ventilation resistance under a 4.9 kPa load in a wet state to physiological salt solution having 0.9 percent by weight of a sodium chloride aqueous solution at 23° C., and a 32 g/g or more absorbency after 60 minutes under a 2.0 kPa load to physiological salt solution, and the weighted average of the diameters of resin particles being 430 μm or more.
A water-absorbing resin, which is produced by crosslinking a surface of a water-absorbing resin precursor which contains, per 100 g of said resin precursor, 0.01 or more equivalent amount of carboxyl groups which form a hydro gel,
- the water-absorbing resin being provided in particulate forms with a 250 kPa·sec/m or less ventilation resistance under a 4.9 kPa load in a wet state to physiological salt solution having 0.9 percent by weight of a sodium chloride aqueous solution at 23° C., and a 34 g/g or more absorbency after 60 minutes under no load to physiological salt solution, and containing 18 percent by weight or less water-soluble components after 16 hours at 23° C.
A water-absorbing resin, which is produced by crosslinking a surface of water-absorbing resin precursor which contains, per 100 g of said resin precursor, 0.01 or more equivalent amount of carboxyl groups which form a hydro gel,
- the water-absorbing resin being provided in particulate forms with a 250 kPa·sec/m or less ventilation resistance under a 4.9 kPa load in a wet state to physiological salt solution having 0.9 percent by weight of a sodium chloride aqueous solution at 23° C, and a 34 g/g or more absorbency after 60 minutes under a 2.0 kPa load to physiological salt solution, and containing 18 percent by weight or less water-soluble components after 16 hours at 23° C.
An absorbent, having a 24 g/g or more absorbency under a 2.0 kPa load to physiological salt solution and a 50 kPa·sec/m or less ventilation resistance under a 4.9 kPa load in a wet state, said absorbent comprising a water-absorbing resin and a fabric material that are mixed uniformly.
Dependencies are inferred from the claim text.