Patent ID: 8791210

Claim:
Polyacrylic water-absorbent resin powder having a water-absorbency index of not less than 90 and a bulk specific gravity of 0.6 [g/cm 3 ] to 0.8 [g/cm 3 ] and resulting in, when added and sedimented in a physiological saline, that the physiological saline has a surface tension of not less than 60 [mN/m], the water-absorbency index being calculated by the following formula: (Water-absorbency index)=(FSR [g/g/sec])×(bulk specific gravity [g/cm 3 ])×(weight average particle diameter [μm]) (where FSR is a water-absorption rate of 1 g of the polyacrylic water-absorbent resin powder for absorbing 20 g of a physiological saline), wherein an SFC (Saline Flow Conductivity) is not less than 50 [×10 −7 ·Cm 3 s·g −1 ].