COPOLYMERIZED POLYESTER RESIN, HEAT-SHRINKABLE FILM, HEAT-SHRINKABLE LABEL, AND PACKAGED PRODUCT
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United States of America Patent
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May 18, 2023
app pub date -
Apr 9, 2021
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Apr 9, 2021
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Abstract
The present invention relates to a copolymerized polyester resin which can give film characteristics being suitable for a use as a heat-shrinkable label and which is excellent in the recycling property. According to the present invention, there is provided a copolymerized polyester resin which contains dicarboxylic acid and diol as constituting components, wherein the copolymerized polyester resin contains terephthalic acid as a main component of a dicarboxylic acid component, and contains ethylene glycol as a main component of a diol component, wherein a content of neopentyl glycol is from 18 to 32% by mole and a content of diethylene glycol is from 7 to 15% by mole when a total amount of the whole diol component is taken as 100% by mole, and wherein a molar proportion of each phosphorus compound contained in the copolymerized polyester resin and having a specific structure satisfies the specific inequality (1).
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