| abstract |
This production method includes a drying step of drying a particulate hydrogel-like crosslinked polymer obtained by polymerizing a monomer serving as a raw material of a water-absorbent resin using a heating apparatus to obtain a particulate dried product. The heating device includes a rotating container that accommodates the particulate hydrogel-like polymer therein and rotates, and a plurality of heating pipes located inside the rotating container, extending in the axial direction and rotating together with the rotating container. The gel temperature measured with a contact thermometer of the particulate hydrogel-like crosslinked polymer used in the drying step is 50°C or higher. |