APPARATUS AND METHOD FOR PRODUCING FILM FROM DOPE

摘要

Dope containing polymer and solvent is cast onto a belt (46) to form a casting film (69) . An air duct (70) is disposed such that an outlet (71a) of the air duct (70) may be opened in the running direction of the belt (46) . The outlet (71a) is partitioned by plural rectifier fins (100) . A duct main body (71) has side members (71b) to which air shielding plates are respectively attached. Just after the formation of the casting film (69), the drying air is fed out from the outlet (71a) so as to be parallel to the belt (46) . Thus the casting film (69) is dried while the rectified drying air is fed out to reduce the entrained air which is generated by feeding the drying air without rectification. Therefore, the unevenness is reduced such that the produced film may be excellent in planarity.