| 摘要 |
<p>A water-absorbing resin which is obtained by beating a massy water-containing gel cross-linking polymer having viscosity and flexibility and drying without kneading and crushing. When the polymer contains bubbles, beating is carried out in such a manner as to restrict the decrease of the bubbles in the polymer. To beat the polymer, it is possible to employ a method which cuts the polymer by shearing by stationary blades and rotary blades; a method which cuts the resin by using a cutter equipped with pairs of rotary blades disposed on mutually different shafts and rotating while at least a part thereof rotates in superposition; a method which cuts the polymer by a cutter having rotary blades with a lubricant; a method which freezes the resin and then beats it. According to these methods, the decrease of the bubbles contained in the polymer can be restricted, and a porous water-absorbing resin having excellent water absorptivity can be mass-produced easily in an industrial manner.</p> |
