| abstract |
Disclosed is water-absorbent resin particles including a crosslinked polymer having a structural unit derived from an ethylenically unsaturated monomer including at least one compound selected from the group consisting of (meth)acrylic acid and a salt thereof, in which a proportion of (meth)acrylic acid and a salt thereof is 70 to 100 mol% with respect to a total amount of monomer units in the crosslinked polymer, and a dissolved content in an aqueous solution of 0.9% by mass NaCl at 25°C is 10% by mass or more and 25% by mass or less, and a dissolved content in an aqueous solution of 0.9% by mass NaCl at 40°C is 14% by mass or more and 30% by mass or less, where the dissolved contents are measured by a specific method. |