Title:
HEAT-SHRINKABLE POLYESTER-BASED FILM ROLL
Document Type and Number:
WIPO Patent Application WO/2022/009780
Kind Code:
A1
Abstract:
[Problem] To provide a heat-shrinkable polyester-based film roll that can reduce defects in a heat shrinkage process due to a fluctuation in a heat shrinkage rate in a heat shrinkable polyester-based film roll having a main shrinkage direction in a longitudinal direction, in particular, defects occurring when a film is heat-shrunk after mounting on a packaging object by a wrap round method. [Solution] A heat-shrinkable polyester-based film roll in which a heat-shrinkable polyester-based film having a main shrinkage direction in a longitudinal direction is wound around a core, wherein a predetermined polyester composition is satisfied, and a heat shrinkage rate in the longitudinal direction after immersion in warm water at 90°C for 10 seconds is 30-80% and ±3% or less of the average heat shrinkage rate for all the samples when the samples are taken about every 100 m.
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Inventors:
ISHIMARU SHINTARO (JP)
HARUTA MASAYUKI (JP)
HARUTA MASAYUKI (JP)
Application Number:
PCT/JP2021/024994
Publication Date:
January 13, 2022
Filing Date:
July 01, 2021
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
B29C61/06; B65D65/02; C08J5/18; B29K67/00; B29L7/00
Foreign References:
| JP2005178396A | 2005-07-07 | |||
| JP2003170494A | 2003-06-17 |
Other References:
See also references of EP 4180217A4
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