Patent ID: 7847144
Filing Date: 2010-12-07
Classification: A61L

Abstract:
1. 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 storage zone and a fluid acquisition zone discrete from and adjacent to said storage zone, wherein said fluid acquisition zone comprises surface-coated superabsorbent polymer particles, wherein: a) said surface-coated superabsorbent polymer particles comprise superabsorbent polymer particles having a surface, and cationic polymers on the surface of the superabsorbent polymer particles, wherein said cationic polymers have 1 to 25 mol/kg, referring to the total weight of the cationic polymers, of cationic groups, which can be protonated, wherein said cationic polymers are not substantially covalently bound to said superabsorbent polymer particles; and b) said surface-coated superabsorbent polymer particles of the fluid acquisition zone have a Cylinder Centrifuge Retention Capacity (CCRC) of less than 20 g/g; further wherein the storage zone does not comprise superabsorbent polymer particles which have a CCRC of less than 25 g/g; wherein said fluid acquisition zone comprises said surface-coated superabsorbent polymer particles in a concentration of at least 50% by weight of said fluid acquisition zone; and said superabsorbent polymer particles of the fluid acquisition zone are substantially free of covalent surface cross-links.