Water-absorbing resin suitable for absorbing viscous liquids containing high-molecular compound, and absorbent and absorbent article each comprising the same
AssigneeSumitomo Seika Chemicals Co., Ltd.
InventorsYasuhiro Nawata, Masakazu Yamamori, Koji Ueda, Hideki Yokoyama, Masato Fujikake
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Abstract
A water-absorbent resin is provided which is suitable for absorbing polymer-containing viscous liquids, wherein the specific surface area measured by the BET multipoint technique using krypton gas as the adsorption gas is no less than 0.05 m2/g, and the water retention capacity for 0.9 wt % physiological saline is 5-30 g/g.
Claims5
1-5. (canceled)
A water-absorbent resin suitable for absorbing polymer-containing viscous liquids,
- wherein the resin is selected from the group consisting of hydrolyzed starch/acrylonitrile graft copolymers, neutralized starch/acrylic acid graft copolymers, saponified vinyl acetate/acrylic acid esters, and partially neutralized polyacrylic acids;
- wherein the resin has a specific surface area of no less than 0.05 m2/g measured by a BET multipoint technique using krypton gas as an adsorption gas;
- wherein the resin has a water retention capacity of 5-30 g/g for 0.9 wt % physiological saline under a centrifugal force of 167 G;
- and
- wherein 0.02 g of the water-absorbent resin exhibits a swelling power of at least 5 N (newtons) when 60 seconds has elapsed after starting to absorb 0.9 wt % physiological saline.
An absorbent core comprising a combination of a water-absorbent resin and a fibrous product,
- wherein the resin is selected from the group consisting of hydrolyzed starch/acrylonitrile graft copolymers, neutralized starch/acrylic acid graft copolymers, saponified vinyl acetate/acrylic acid esters, and partially neutralized polyacrylic acids;
- wherein the water-absorbent resin has a specific surface area of no less than 0.05 m2/g measured by a BET multipoint technique using krypton gas as an adsorption gas;
- wherein the water-absorbent resin has a water retention capacity of 5-30 g/g for 0.9 wt % physiological saline under a centrifugal force of 167 G;
- and
- wherein 0.02 g of the water-absorbent resin exhibits a swelling power of at least 5 N (newtons) when 60 seconds has elapsed after starting to absorb 0.9 wt % physiological saline.
An absorbent article comprising a liquid-permeable sheet, a liquid-impermeable sheet, and an absorbent core disposed therebetween;
- wherein the absorbent core comprises a combination of a water-absorbent resin and a fibrous product;
- wherein the resin is selected from the group consisting of hydrolyzed starch/acrylonitrile graft copolymers, neutralized starch/acrylic acid graft copolymers, saponified vinyl acetate/acrylic acid esters, and partially neutralized polyacrylic acids;
- wherein the water-absorbent resin has a specific surface area of no less than 0.05 m2/g measured by a BET multipoint technique using krypton gas as an adsorption gas;
- wherein the water-absorbent resin has a water retention capacity of 5-30 g/g for 0.9 wt % physiological saline under a centrifugal force of 167 G;
- and
- wherein 0.02 g of the water-absorbent resin exhibits a swelling power of at least 5 N (newtons) when 60 seconds has elapsed after starting to absorb 0.9 wt % physiological saline.
Dependencies are inferred from the claim text.