Title:
光学フィルムの製造方法
Document Type and Number:
Japanese Patent JP6888630
Kind Code:
B2
Abstract:
Provided is a method for manufacturing an optical film using a solution casting film formation technique, the method comprising a casting step and a peeling step. In the casting step, a dope, which contains a solvent and any one resin among a cycloolefin resin, a polyimide resin, and a polyarylate resin, is cast on a support (3) and dried to form a cast film (5). In the peeling step, the cast film (5) is peeled off from the support (3). In the casting step, a mixed solvent of a good solvent and a poor solvent is sprayed on a widthwise end of the cast film (5) from a position no further than 5 m upstream from a peeling position (P) in a widthwise central portion of the cast film (5). The content of the poor solvent in the mixed solvent is 16 mass% or less.
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Inventors:
Kenta Majima
Takashi Nanjo
Takashi Nanjo
Application Number:
JP2018541907A
Publication Date:
June 16, 2021
Filing Date:
June 21, 2017
Export Citation:
Assignee:
Konica Minolta Co., Ltd.
International Classes:
B29C41/24; B29C41/36; C08J5/18
Domestic Patent References:
| JP2013126727A | ||||
| JP2005193691A | ||||
| JP5086212A |
Foreign References:
| WO2013035249A1 |
Attorney, Agent or Firm:
Sano patent office