Title:
熱収縮性ポリエステル系フィルム、およびその製造方法、包装体
Document Type and Number:
Japanese Patent JP6572907
Kind Code:
B2
Abstract:
The invention provides a heat-shrinkable polyester film which has a high heat shrinkage rate in the width direction, exhibits a low heat shrinkage rate in the longitudinal direction, and has a great mechanical strength in the longitudinal direction, good openability along perforations, and excellent shrink finish. The film has a hot-water heat shrinkage rate of 40% to 85% in the main shrinking direction and −5% to 15% in the perpendicular direction when the film is immersed in hot water at 98° C. for 10 seconds, and a maximum shrinkage stress of 2-7 MPa in the main shrinking direction when measured in hot air of 90° C. and the shrinkage stress 30 seconds after measurement of the shrinkage stress has started is of 60-100% of the maximum shrinkage stress. The film contains 6 mol % or more of diethylene glycol-derived constituent units with respect to 100 mol % of all polyester resin components.
Inventors:
Masayuki Haruta
Shintaro Ishimaru
Shintaro Ishimaru
Application Number:
JP2016559661A
Publication Date:
September 11, 2019
Filing Date:
July 22, 2016
Export Citation:
Assignee:
Toyobo Co., Ltd.
International Classes:
B29C61/06; B29C55/14; B65D25/20; B65D25/36; C08J5/18
Domestic Patent References:
| JP2011184690A | ||||
| JP2011102392A | ||||
| JP5240387B1 | ||||
| JP2007016120A | ||||
| JP2007056156A | ||||
| JP2014055236A | ||||
| JP3142224A |