Absorbent articles comprising super absorbent polymer having a substantially non-convalently bonded surface coating
AssigneeThe Procter & Gamble Company
InventorsHolger Beruda, Yasue Nakagawa, Andrea Lieselotte Link, Axel Meyer
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Abstract
The present invention relates to absorbent articles comprising superabsorbent polymer particles. The superabsorbent polymer particles are coated with cationic polymers having 1 to 25 mol/kg, referring to the total weight of the cationic polymers, of cationic groups, which can be protonated. The cationic polymers are not substantially covalently bound to the superabsorbent polymer particles. Furthermore, the superabsorbent polymer particles are not substantially covalently surface cross-linked.
Claims25
An absorbent article comprising a substantially liquid pervious topsheet, a substantially liquid impervious backsheet and an absorbent core between said topsheet and said backsheet, wherein said topsheet and said backsheet are at least partially joined together, and wherein said absorbent core comprises a fluid acquisition zone and a storage zone, wherein said fluid acquisition zone comprises a first layer and a second layer, wherein said second layer is adjacent to said storage zone, wherein said storage zone and said fluid acquisition zone comprises surface-coated superabsorbent polymer particles, wherein said first layer is substantially comprised of nonwoven fabric and wherein said second layer comprises surface-coated superabsorbent polymer particles in a concentration of at least about 70% by weight of said second layer, wherein said surface-coated superabsorbent polymer particles comprise superabsorbent polymer particles having a surface, and cationic polymers coated on the surface of the superabsorbent polymer particles, wherein:
- a) said superabsorbent polymer particles are not substantially covalently surface cross linked;
- and
- b) said cationic polymers are not substantially covalently bound to said superabsorbent polymer particles.
An absorbent article comprising a substantially liquid pervious topsheet, a substantially liquid impervious backsheet and an absorbent core between said topsheet and said backsheet, wherein said topsheet and said backsheet are at least partially joined together, and wherein said absorbent core comprises a fluid acquisition zone and a storage zone, wherein said fluid acquisition zone comprises a first layer and a second layer, wherein said second layer is adjacent to said storage zone, wherein said storage zone and said fluid acquisition zone comprises surface-coated superabsorbent polymer particles, wherein said first layer is substantially comprised of nonwoven fabric and wherein said second layer comprises surface-coated superabsorbent polymer particles in a concentration of at least about 70% by weight of said second layer, wherein said surface-coated superabsorbent polymer particles comprise superabsorbent polymer particles having a surface, and cationic polymers coated on the surface of the superabsorbent polymer particles, wherein said cationic polymers are not substantially covalently bound to said superabsorbent polymer particles, and wherein said cationic polymers are not substantially covalently bound to each other.
Dependencies are inferred from the claim text.