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1. (WO2018061803) SOLUTION FILM-FORMING METHOD

Pub. No.:    WO/2018/061803    International Application No.:    PCT/JP2017/033321
Publication Date: Fri Apr 06 01:59:59 CEST 2018 International Filing Date: Fri Sep 15 01:59:59 CEST 2017
IPC: B29C 41/28
B29C 41/46
Applicants: FUJIFILM CORPORATION
富士フイルム株式会社
Inventors: YOSHIDA, Shunichi
吉田 俊一
Title: SOLUTION FILM-FORMING METHOD
Abstract:
Provided is a solution film-forming method for forming an optical film of which smoothness is further improved. Solution film-forming equipment (10) forms a film (11) from dope (21). An annular belt (23) continuously travels in a longitudinal direction while being wound around a first roller (26) and a second roller (27). The second roller has a higher circumferential surface temperature than the first roller. The dope is cast on the belt on the first roller to form a flow cast film (29). A gas having a higher temperature than the circumferential surface of the first roller is supplied to the belt moving from the second roller to the first roller. Thus, the belt moving to the first roller is cooled at a cooling rate of 5°C/min or less. The flow cast film is separated from the belt to form a film. The formed film is dried.