Title:
HEAT-SHRINKABLE POLYESTER FILM AND PACKAGING MATERIAL
Document Type and Number:
WIPO Patent Application WO/2016/152517
Kind Code:
A1
Abstract:
[Problem] To provide a heat-shrinkable polyester film which rarely undergoes secondary shrinkage to improve shrunk finish thereof.
[Solution] A heat-shrinkable polyester film which has an ethylene terephthalate unit and contains a constituent unit derived from at least one monomer that can act as an amorphous component and a constituent unit derived from butanediol in amounts of 18 mol% or more and 1 to 25 mol% inclusive, respectively, relative to 100 mol%, i.e., the total amount, of all of polyester resin components, and which has such properties that the secondary shrinkage ratio, the hot water thermal shrinkage ratio and the difference in reversing heat capacity through the glass transition temperature thereof meet specified ranges.
Inventors:
ISHIMARU SHINTARO (JP)
HARUTA MASAYUKI (JP)
HARUTA MASAYUKI (JP)
Application Number:
PCT/JP2016/057319
Publication Date:
September 29, 2016
Filing Date:
March 09, 2016
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
C08J5/18; B29C61/06; B65D23/08; B65D25/36; B29K67/00; B29L7/00
Domestic Patent References:
| WO2014185442A1 | 2014-11-20 |
Foreign References:
| JPH03103432A | 1991-04-30 |
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