Title:
光学フィルム製造用ポリエステルフィルム
Document Type and Number:
Japanese Patent JP6838284
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a polyester film for producing an optical film, which can be used as a base material for achieving production of an optical film having high productivity and uniform physical properties in a width direction.SOLUTION: The polyester film for producing an optical film shows a thermal shrinkage of 3.0% or less in a film MD direction at 150°C and a thermal shrinkage of 1.5% or less in a TD direction, and satisfies expression (I): 0.020≤|1-(NA+NB)/(NC×2)|≤0.300. In the expression, NA represents a plane orientation degree at a position at a distance of 500 mm in a given direction (A direction) of the TD direction from the center of the film in the TD direction; NB represents a plane orientation degree at a position at a distance of 500 mm in a direction (B direction) opposite to the A direction of the TD direction from the center of the film in the TD direction; and NC represents a plane orientation degree at the center of the film in the TD direction.SELECTED DRAWING: None
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Inventors:
Yoshikazu Kono
Hideo Souji
Nishiguchi Yoshiki
Hideo Souji
Nishiguchi Yoshiki
Application Number:
JP2016088894A
Publication Date:
March 03, 2021
Filing Date:
April 27, 2016
Export Citation:
Assignee:
TORAY INDUSTRIES,INC.
International Classes:
C08J5/18; B32B7/023; B32B7/027; B32B27/36
Domestic Patent References:
| JP2015151529A |
Foreign References:
| WO2008001932A1 |
Other References:
延伸フィルムの位相差の幅方向プロファイル測定,OSI Oji Scientific Instruments,王子計測機器株式会社,2009年 1月,p.1-6,URL,http://www.oji-keisoku.co.jp/products/kobra/img/sample22.pdf
PETフィルムの光学特性に関する新たな知見,OSI Oji Scientific Instruments,王子計測機器株式会社,2009年 7月,p.1-11,URL,http://www.oji-keisoku.co.jp/products/kobra/img/sample22.pdf
PETフィルムの光学特性に関する新たな知見,OSI Oji Scientific Instruments,王子計測機器株式会社,2009年 7月,p.1-11,URL,http://www.oji-keisoku.co.jp/products/kobra/img/sample22.pdf