Binding method of water absorbent resin

Abstract

Aqueous liquid and moisture vapor are added to water absorbent resin powder so that particles of the water absorbent resin powder are bound. In forming bound particles by supplying aqueous liquid and moisture vapor to the water absorbent resin powder, the foregoing arrangement makes it possible to supply moisture to whole the powder so that a less amount of particles remains unbound (ungranulated) and increase of a concentration of the water absorbent resin bound particles allows for further improvement of a drying efficiency and makes it possible to obtain particulate water absorbent resin having excellent properties even when the bound particles are highly concentrated. The present invention provides (i) a method for binding water absorbent resin and (ii) a method for producing particulate water absorbent resin which method includes the step of binding particles of water absorbent resin powder. The foregoing effect can be obtained by these methods.

Dependencies are inferred from the claim text.