| abstract |
Disclosed are water-absorbent resin particles comprising a crosslinked polymer containing a monomer unit derived from a water-soluble ethylenically unsaturated monomer, wherein an initial swelling force as measured according to the swelling force test conducted by a predetermined method is at least 8N, and, with respect to the total amount of the water absorbent resin particles, a proportion of particles having a particle diameter of 250-850 μm (exclusive of 250μm) is at least 70 mass% and a proportion of particles having a particle diameter of less than 250μm is at most 20 mass%. |