Title:
HEAT SHRINKABLE POLYESTER FILM, HEAT SHRINKABLE LABEL, AND PACKAGE
Document Type and Number:
WIPO Patent Application WO/2022/044959
Kind Code:
A1
Abstract:
[Problem] To provide a heat shrinkable polyester film which has high thermal shrinkage ratio in the main shrinkage direction, and which enables the achievement of a good recycled PET resin even if recycled together with used beverage PET bottles. [Solution] A heat shrinkable polyester film which contains: from 95% by mole to 100% by mole of a dicarboxylic acid and from 0% by mole to 5% by mole of isophthalic acid in 100% by mole of dicarboxylic acid components; from 85% by mole to 98% by mole of an ethylene terephthalate unit in 100% by mole of all ester units; and from 2% by mole to 15% by mole of diethylene glycol in 100% by mole of polyhydric alcohol components. This heat shrinkable polyester film has a specific hot water thermal shrinkage ratio, while having a melting peak temperature within a specific range, an amount of heat generation during crystallization within a specific range and an amount of heat generation during melting within a specific range as determined with use of a differential scanning calorimeter (DSC) after being melted, subsequently cooled and then heated again.
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Inventors:
HARUTA MASAYUKI (JP)
Application Number:
PCT/JP2021/030389
Publication Date:
March 03, 2022
Filing Date:
August 19, 2021
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
B29C55/14; B29C61/06; B65D25/36; B65D65/40; C08J5/18
Domestic Patent References:
| WO2018025801A1 | 2018-02-08 | |||
| WO2011114934A1 | 2011-09-22 | |||
| WO2020021948A1 | 2020-01-30 |
Foreign References:
| JP2008274160A | 2008-11-13 | |||
| JP2002103545A | 2002-04-09 | |||
| JP5286763B2 | 2013-09-11 | |||
| JP5625912B2 | 2014-11-19 | |||
| JP5633808B2 | 2014-12-03 |
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