Title:
BIAXIALLY-ORIENTED POLYESTER FILM AND LAYERED BODY
Document Type and Number:
WIPO Patent Application WO/2022/202569
Kind Code:
A1
Abstract:
Provided is a biaxially-oriented polyester film that can be suitably used for deep drawing molding by layering metal layers, that is excellent in terms of moldability and adhesion to a metal layer, that is excellent in terms of blocking resistance, and that hardly curls. The biaxially-oriented polyester film, that is a layered film having at least an easily adhering layer and a base material layer in which polyester is the main component, that is layered in the order of easily adhering layer/base material layer/easily adhering layer, and that satisfies any of (1)-(4) below. (1) The difference in the reversible thermal capacity variations ΔCp between the vicinities of the glass transition temperatures of the easily adhering layers and the base material layer is 0.10-0.45, inclusive.
(2) The heatseal strength between the two easily adhering layers of the film is 0.5 N/15 mm or less.
(3) Stress F10 at the time of 10% elongation in the MD direction and the TD direction is 90 MPa to 160 MPa, inclusive.
(4) The molecular orientation ratio measured by using a molecular orientation meter is 1.0 to 1.3, inclusive.
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Inventors:
TAMARI NOBORU (JP)
HARUTA MASAYUKI (JP)
HARUTA MASAYUKI (JP)
Application Number:
PCT/JP2022/012053
Publication Date:
September 29, 2022
Filing Date:
March 16, 2022
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
B32B27/36; B32B15/09; B65D65/40; C08L67/02
Domestic Patent References:
| WO2017159582A1 | 2017-09-21 | |||
| WO2018021211A1 | 2018-02-01 | |||
| WO2014175313A1 | 2014-10-30 | |||
| WO2018150997A1 | 2018-08-23 |
Foreign References:
| JP2011140140A | 2011-07-21 | |||
| JPH03169549A | 1991-07-23 | |||
| JPH03176146A | 1991-07-31 | |||
| JP6177475B1 | 2017-08-09 | |||
| JP5891792B2 | 2016-03-23 |
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