| 摘要 |
PURPOSE:To easily peel a cellulose triacetate laminated film from a casting support while ensuring a sufficient wet heat resistance in producing the laminated film. CONSTITUTION:Pumps 33, 34 are driven to send a dope 11 for a cotton film and a dope 21 for a pulp film to a co-casting die 30. The sent-in dopes 11, 21 are cast on a band 37 as a two-layered structure wherein the dope 11 for the cotton film is positioned on a lower side and the dope 21 for the pulp film is positioned on an upper side. Therefore, only the dope 11 for the cotton film comes into contact with the band 37 and the dope 21 for the pulp film becomes a state not coming into contact with the band 37. The formed laminated sheet is dried by hot air (a) while fed in this state to be peeled off from the band 37 by a scraping roll 39. |
