Patent ID: 8426670

Claim:
Water-absorbent resin particles, which comprise a crosslinked poly(acrylic acid (salt)) polymer in a major proportion and display a weight-average particle diameter of 150 to 600 μm, a capillary absorption capacity D of not less than 30 (g/g) at a height of 0 cm, and a capillary absorption capacity D of not less than 15 (g/g) at a height of 40 cm, and display a capillary absorption index B at a height of 40 cm of not less than 0.4, wherein the capillary absorption index B=the capillary absorption capacity D at a height of 40 cm/the capillary absorption capacity D of at a height of 0 cm wherein the capillary absorption capacity D at a height of 40 cm is an absorption capacity calculated from the absorption quantity (g) of 0.44 g of the water-absorbent resin in a state where the liquid-absorbing position (H1) is 40 cm higher than the liquid surface height (H2) in a liquid-storing receptacle, under a load of 0.06 psi for 30 minutes.