| 摘要 |
<p>In mixing and reacting a water-absorbing resin having carboxyl groups with an aqueous fluid containing a cross-linking agent reactive with the carboxyl groups and so on, a high-speed continuous extruding mixer is used, which is provided with a plurality of mixing members around the rotating shaft in the fixed casing. These mixing members are arranged in such a way as to form a second zone on the discharge side of a first zone wherein the water-absorbing resin fed into the casing is dispersed, with the extruding thrust of the second zone being smaller that that of the first zone. The use of this equipment permits the production of a water-absorbent which exhibits a high absorption capacity under pressure and can always exhibit excellent characteristics in final products.</p> |
