| 摘要 |
PROBLEM TO BE SOLVED: To provide a method whereby a powdery polymer compd., esp. gelatin, can be dissolved in a short time at low equipment and running costs without allowing undissolved lumps and bubbles to occur. SOLUTION: A solvent is charged into a tank equipped with a stirrer and a constant-temp. jacket; then, a powdery polymer compd. is charged into the tank and is dispersed in the solvent while the solvent is being stirred at 30-39 deg.C under such conditions that the stirring Reynolds number is 2.0×10<5> or higher; and the resultant dispersion is heated to 40 deg.C at a temp. rise rate of at least 1 deg.C/min and then to 50-60 deg.C. Degassed water is prepf. as the solvent. |
