Title:
POLYIMIDE FILM AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2017/169646
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing: a polyimide film such that flatness deterioration that occurs when the polyimide film is wound in a roll-like shape can be heat-corrected; and a production method for the polyimide film. This polyimide film is characterized in that the total light transmittance is at least 80%, the yellow index (YI) value is at most 4.0, at least 1 g relative to 100 g of dichloromethane is dissolved at 25ºC, and the thermal shrinkage as defined by the following formula is in the range of 0.5-20.0%. Thermal shrinkage(%)={(Lo-L)/Lo}×100 (wherein Lo represents the pre-experiment length of a sample when measured at 25ºC, and L represents the length of the sample when cooled to 25ºC after being kept at 230ºC for 10 minutes).
Inventors:
IWAGAMI NAOYA (JP)
Application Number:
PCT/JP2017/009634
Publication Date:
October 05, 2017
Filing Date:
March 10, 2017
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
C08J5/18; C08G73/10
Domestic Patent References:
| WO2006112286A1 | 2006-10-26 | |||
| WO2008146637A1 | 2008-12-04 |
Foreign References:
| JP2008163107A | 2008-07-17 | |||
| JPH07188554A | 1995-07-25 | |||
| JPH10176071A | 1998-06-30 | |||
| JP2007051256A | 2007-03-01 | |||
| JP2013523939A | 2013-06-17 | |||
| JPH05157250A | 1993-06-22 |
Attorney, Agent or Firm:
KOYO INTERNATIONAL PATENT FIRM (JP)
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