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Title:
METHOD FOR MANUFACTURING LIQUID SOLUTION FILM, CELLULOSE ESTER FILM, PROTECTION FILM, AND POLARIZER
Document Type and Number:
Japanese Patent JP3913613
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a method, for manufacturing a film using a liquid solution, which forms a filmy material using a polymer solution obtained by dissolving a polymer in an organic solvent, then conveys the formed filmy material and obtains a polymer film by passing the filmy material through a drying region where the organic solvent contained in the filmy material is volatilized by heating the filmy material under the established manufacturing conditions for the polymer film with insignificant optical anisotropy.
SOLUTION: When the draw ratio of the conveyed filmy material in a conveying direction(arrow B) inside the drying region l2a is given as εMD and the draw ratio of the conveyed filmy material in a width direction within the drying region l2a is given as εTD, the filmy material is passed through the drying region l2a so that the relationship of -0.05≤εMD-εTD≤ +0.l5 is established.


Inventors:
Nakamura Toshikazu
Yamazaki English number
Application Number:
JP2002163274A
Publication Date:
May 09, 2007
Filing Date:
June 04, 2002
Export Citation:
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Assignee:
FUJIFILM Corporation
International Classes:
B29C55/12; B29C41/24; B29C41/26; B29D7/01; C08J5/18; G02B5/30; G02F1/1335; B29K1/00; B29L7/00; B29L11/00; (IPC1-7): B29C55/12; C08J5/18; G02B5/30; G02F1/1335; //C08L1:08
Domestic Patent References:
JP2001100039A
JP2001100031A
Attorney, Agent or Firm:
Masaki Yamada
Yoshio Kosugi
Mikami Yui