Method for manufacturing water-absorbing resin via surface crosslinking

摘要

A method for surface crosslinking water-absorbing resin of the present invention includes a step (1) of obtaining a wet mixture, a step (2) of obtaining a dried particulate composition, and a step (3) of carrying out a surface crosslinking reaction. Steps (2) and (3) may either be carried out in one processing device or in two serially connected processing devices. With this, since a processing time of each step becomes short, it is possible to mass produce the water-absorbing resin having excellent physical properties. Moreover, a method for manufacturing the water-absorbing resin of the present invention includes a modifying step and a cooling step. The modifying step and/or the cooling step are/is carried out by using stirring means including a rotation axis (70) having a plurality of stirring boards (80), and the stirring means includes the stirring board (80) having a specific thickness and/or a scraping blade (90) having a specific shape. With this, it is possible to suppress the generation of the fine powder in the modifying step and/or the cooling step.