| abstract |
The present invention provides a method for sizing a water-absorbent resin having a surface crosslinked layer free of coarse particles and fine powder. For a water-absorbent resin having a surface cross-linked layer, a step of classifying the water-absorbent resin to remove aggregates and fine powder of the water-absorbent resin to obtain a sized water-absorbent resin; After crushing and classifying to remove coarse particles and fine powder, the particles are sized by the step of uniting with the sized water-absorbent resin. In particular, when the knife cutter is rotated and crushed, a fine powder is not generated, and the surface crosslinked layer is hardly broken, so that a water-absorbent resin having excellent water absorption capacity can be obtained. [Selection diagram] Fig. 1 |