Title:
BIAXIALLY ORIENTED POLYESTER FILM
Document Type and Number:
Japanese Patent JP2020075488
Kind Code:
A
Abstract:
To provide a film having excellent economical efficiency, moldability, processing uniformity, and scratch resistance in order to reduce defects in appearance such as scratches in an optical film which is obtained by peeling a coating layer formed on a biaxially oriented polyester film.SOLUTION: The biaxially oriented polyester film comprises a polyester A layer and a polyester B layer having a lower melting point than the polyester A layer. The polyester A layer is positioned on the outermost layer on at least one side of the polyester B layer, the thickness of the polyester A layer is 1 μm to 9 μm, the proportion of diethylene glycol in polyester A is 0.7% by mass to 1.4% by mass, the peak count value (SPc) of the surface of polyester A layer is 160 to 300, and the orientation angle is 30 degrees or less.SELECTED DRAWING: None
Inventors:
MAEHANE HIDEAKI
MORISHITA KENTA
YAMAMOTO HIROMI
MORISHITA KENTA
YAMAMOTO HIROMI
Application Number:
JP2019173929A
Publication Date:
May 21, 2020
Filing Date:
September 25, 2019
Export Citation:
Assignee:
TORAY INDUSTRIES
International Classes:
B32B27/36; B29C55/12; B32B3/30; B32B7/022; B32B7/023
Domestic Patent References:
| JP2007291199A | 2007-11-08 | |||
| JP2004098571A | 2004-04-02 | |||
| JP2008194945A | 2008-08-28 |