| 摘要 |
PROBLEM TO BE SOLVED: To adjust a molding material by shortening an adjustment time and reducing energy consumption. SOLUTION: Paper fibers are fibrillated by stirring 60 parts paper fibers and 70 parts water at a circumferential speed of 25 m/sec for 90 sec. and then a starch binder consisting of 28 parts starch and 12 part polyvinyl alcohol and one part zinc stearate are added. Further, the mixture is stirred at a circumferential speed of 25 m/sec at 60-100 deg.C and for one min. 30 sec. Consequently, the starch binder becomes pasty to allow the fibrillated paper fibers to be formed into granules with an average particle diameter of 4 mm. Thus a kneading process is omitted and therefore, an adjustment time is shortened and energy consumption is reduced.
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