Title:
PROCESS FOR PRODUCING POLYIMIDE FILM
Document Type and Number:
WIPO Patent Application WO/2004/062873
Kind Code:
A1
Abstract:
A polyimide film is produced by adding a dehydrating reagent to a polyamic acid solution; subsequently casting the obtained solution over a support to thereby obtain a film; introducing the film together with the support in a reaction congelation vessel equipped with means for preventing leakage of air from inside the vessel to outside the vessel, and heating them in an atmosphere of 1 to 2000 ppm water content to thereby obtain a gel film having at least portion of the polyamic acid converted to polyimide or polyisoimide; separating the obtained gel film from the support, optionally followed by washing; performing simultaneous biaxial orientation or sequential biaxial orientation to thereby obtain a biaxially oriented film, optionally followed by washing so as to remove solvents; and performing heat treatment thereof, thereby forming a biaxially oriented polyimide film.
Inventors:
TANGE SHINYA (JP)
MORI SHINICHIRO (JP)
NAGASHIMA RYOUICHI (JP)
NAKAMURA TSUTOMU (JP)
ISHIWATA TOYOAKI (JP)
SAWAKI TORU (JP)
MORI SHINICHIRO (JP)
NAGASHIMA RYOUICHI (JP)
NAKAMURA TSUTOMU (JP)
ISHIWATA TOYOAKI (JP)
SAWAKI TORU (JP)
Application Number:
PCT/JP2003/008845
Publication Date:
July 29, 2004
Filing Date:
July 11, 2003
Export Citation:
Assignee:
TEIJIN LTD (JP)
TANGE SHINYA (JP)
MORI SHINICHIRO (JP)
NAGASHIMA RYOUICHI (JP)
NAKAMURA TSUTOMU (JP)
ISHIWATA TOYOAKI (JP)
SAWAKI TORU (JP)
TANGE SHINYA (JP)
MORI SHINICHIRO (JP)
NAGASHIMA RYOUICHI (JP)
NAKAMURA TSUTOMU (JP)
ISHIWATA TOYOAKI (JP)
SAWAKI TORU (JP)
International Classes:
B29C41/28; B29C55/12; B29D7/01; C08G73/10; C08J5/18; C08L79/08; H05K1/03; (IPC1-7): B29C41/12; B29C55/02; C08G73/10; C08J5/18
Domestic Patent References:
| WO2001081456A1 | 2001-11-01 |
Foreign References:
| US5460890A | 1995-10-24 | |||
| JP2002179810A | 2002-06-26 | |||
| JPS6277921A | 1987-04-10 | |||
| JPS636028A | 1988-01-12 | |||
| JPH1067851A | 1998-03-10 | |||
| JPH03264333A | 1991-11-25 | |||
| JP2003268135A | 2003-09-25 | |||
| JP2003283077A | 2003-10-03 | |||
| JPH01282219A | 1989-11-14 | |||
| JP2001081213A | 2001-03-27 |
Attorney, Agent or Firm:
Mihara, Hideko c/o Teijin Intellectual Property Center Limited (1-1 Uchisaiwaicho 2-chom, Chiyoda-ku Tokyo, JP)
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