Patent ID: 7875362

Claim:
A disposable absorbent article, comprising: (a) a topsheet; (b) a backsheet; (c) an absorbent member disposed between the topsheet and backsheet, the absorbent member including a water absorbent resin in the form of a plurality of water-swellable, water-insoluble, cross-linked polymer particles, at least some of the polymer particles including a substantially uniform structure of surface cross-links formed by i. mixing the polymer particles, water, and a radical polymerization initiator, without addition of an ethylenically unsaturated monomer, to obtain a water absorbent resin composition, the water being present in an amount that exceeds 20 parts by weight but is not more than 100 parts by weight based on 100 parts by weight of the water absorbent resin, ii. irradiating said water absorbent resin composition with active energy rays to provide the surface cross-link structure, wherein the surface water content of the polymer particles is not lower than 3.0% according to the equation: (m)=(l)×((k)/100), wherein m is the surface water content in wt %, l is the weight ratio of the amount of water contained in a treating solution in wt %, and k is the extraction ratio in wt %; and (d) wherein the water absorbent resin exhibits an absorbency of physiological saline against pressure of 4.83 kPa of between about 8 g/g and about 40 g/g, when measured according to the Absorbency Against Pressure test herein.