| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for preparing a cellulose acylate solution under conditions as close to a normal temperature as possible without use, as a solvent for a cellulose acylate, of any chlorine-based organic solvent such as methylene chloride and without resorting to any cooling dissolution technique, and also a method for preparing a cellulose acylate film and the cellulose acylate film obtained by this method. SOLUTION: A method for preparing a cellulose acylate solution comprises the steps of treating a mixture, which comprises a cellulose acylate whose hydroxyl group is substituted with an acyl group having 3 or more carbon atoms and an organic solvent mainly composed of a non-chlorine-based organic solvent, under a pressure of 10 to 5,000 kgf/cm<2> , and further treating the thus treated mixture under a pressure of 0.1 to 10 kgf/cm<2> . |
