Title:
BIAXIALLY ORIENTED POLYESTER FILM AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2020/095725
Kind Code:
A1
Abstract:
The present invention provides: a biaxially oriented polyester film which has excellent mechanical properties, transparency and heat resistance, while being excellent in terms of secondary processing adequacy and print appearance; and a method for producing this biaxially oriented polyester film. A biaxially oriented polyester film which is configured such that: at least one film surface satisfies the requirements (1) and (2) described below; and the film satisfies the requirements (3) and (4) described below.
(1) The maximum profile peak height (SRp) is 1.2-1.6 μm.
(2) The arithmetic mean roughness (SRa) is 0.024-0.045 μm.
(3) The tensile strengths in the longitudinal direction and in the width direction are 180-300 MPa.
(4) The haze is 7% or less.
Inventors:
NAKANO MAHIRO (JP)
HARUTA MASAYUKI (JP)
HARUTA MASAYUKI (JP)
Application Number:
PCT/JP2019/041983
Publication Date:
May 14, 2020
Filing Date:
October 25, 2019
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
C08J5/18; B29C48/08; B29C48/16; B29C55/14; B32B7/022; B32B7/023; B32B27/20; B32B27/36; C08J3/22
Domestic Patent References:
| WO2013146524A1 | 2013-10-03 | |||
| WO2013146524A1 | 2013-10-03 |
Foreign References:
| JP2000109576A | 2000-04-18 | |||
| JP2001171060A | 2001-06-26 | |||
| JP2001310434A | 2001-11-06 | |||
| JP2003175577A | 2003-06-24 | |||
| JP2003236926A | 2003-08-26 | |||
| JP2015174356A | 2015-10-05 | |||
| JP2015199265A | 2015-11-12 | |||
| JP2017013387A | 2017-01-19 | |||
| JP2014008720A | 2014-01-20 | |||
| JP2018090740A | 2018-06-14 | |||
| JPH1140453A | 1999-02-12 | |||
| JP2018083874A | 2018-05-31 |
Other References:
See also references of EP 3878895A4
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