METHOD FOR PRODUCING WATER-ABSORBING RESIN AND SPADE TYPE MIXER

摘要

PROBLEM TO BE SOLVED: To provide a method for mixing a water-absorbing resin with a surface-cross-linking agent-containing solution by suppressing the formation of aggregated substances. SOLUTION: This method for mixing the water-absorbing resin with the surface-cross-linking agent-containing solution is provided by mixing them in a spade type mixer having an inner wall, a spade-shaped agitating blade and a crushing blade formed by a base material having≥60°contact angle against water and≥70°C thermal distortion temperature. Since the formation of the aggregated substances is less, later crushing is not required and it is possible to produce the water-absorbing resin having less amount of fine powder caused by the crushing. COPYRIGHT: (C)2005,JPO&NCIPI