The drying method of a particulate crosslinked hydrogel polymer

The present invention is to fine the hydrogel crosslinked polymer obtained by polymerizing a monomer aqueous solution after polymerization or during the polymerization, the obtained particulate crosslinked hydrogel polymer is dried in through-flow band type drier in step provides a drying method to achieve both cost reduction and high property. The method of the present invention, after the introduction of the particulate water-containing gel-like crosslinked polymer drying zone of the ventilation band type drier, drying conditions for a period of up to solid concentration reaches 80% by weight (1) Particulate and the temperature of the hot blown to the hydrogel layer, the temperature difference between the temperature of the heat air is measured after passing through the particulate hydrous gel layer and satisfies that the 20 to 70 ° C..