| 摘要 |
PROBLEM TO BE SOLVED: To provide a solution film forming method capable of suppressing the flapping of an ear part caused in a dope casting part without sharply changing an apparatus structure to enable stable high speed casting. SOLUTION: A solution film forming apparatus 10 is mainly equipped with a casting die 12 for extruding a dope, a casting band 14 traverlling at a high speed, a vacuum chamber 16 for applying suction force to a dope casting part 26 and a dripping device 18 for dripping a liquid on the ear 26A of the casting part 26. The liquid dripped by the dripping device 18 is a mixed liquid prepared by mixing a poor solvent with a solvent good with respect to the solute of the dope and, in the case of the mixed liquid, the poor solvent is set to below 20 wt.% of the whole of the dripping liquid. COPYRIGHT: (C)2005,JPO&NCIPI |
