Title:
BIAXIALLY ORIENTED POLYESTER FILM
Document Type and Number:
WIPO Patent Application WO/2018/225558
Kind Code:
A1
Abstract:
[Problem] To obtain a polyester film that has excellent pinhole properties and blister breaking resistance, excellent adhesion strength even after boiling or retort treatment, and little pitch displacement during printing or position displacement during application of a sealant, etc. [Solution] A biaxially oriented polyester film simultaneously fulfilling (a)–(d). (a) Being a polyester resin composition containing 60%–90% by weight polybutylene teraphthalate resin (A) and 10%–40% by weight of a polyester resin (B) other than the polybutylene teraphthalate resin (A). (b) Having a dimensional change rate at 80°C of no more than 1.0% in the longitudinal direction of the film, relative to a film base length of a temperature dimensional change curve measured using a thermal mechanical analyzer. (c) Having a thermal shrinkage at 150°C of no more than 4.0% in both the longitudinal and width directions of the film. (d) Having a film plane orientation ΔP of 0.136–0.154.
Inventors:
TAMARI NOBORU (JP)
GOTO TAKAMICHI (JP)
GOTO TAKAMICHI (JP)
Application Number:
PCT/JP2018/020338
Publication Date:
December 13, 2018
Filing Date:
May 28, 2018
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
C08J5/18; C08L67/02
Domestic Patent References:
| WO2016171172A1 | 2016-10-27 | |||
| WO2015178390A1 | 2015-11-26 |
Foreign References:
| JP6123927B1 | 2017-05-10 | |||
| JP2006082319A | 2006-03-30 | |||
| JPH10195210A | 1998-07-28 | |||
| JP2002178471A | 2002-06-26 | |||
| JP2002088233A | 2002-03-27 | |||
| JP2014015233A | 2014-01-30 | |||
| JP2003002987A | 2003-01-08 |
Other References:
See also references of EP 3636694A4
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