Heat-shrinkable polyester-based film
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United States of America
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Mar 25, 2025
Grant Date -
Jan 28, 2021
app pub date -
Mar 25, 2019
filing date -
Mar 25, 2019
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Abstract
The invention provides a heat-shrinkable polyester-based film containing 90 mol % or more of ethylene terephthalate unit based on 100 mol % of whole ester unit, wherein at least a part of ethylene glycol and/or terephthalic acid constituting the ethylene terephthalate unit is derived from biomass resource or the heat-shrinkable polyester-based film contains polyester resin recycled from PET bottles, and the heat-shrinkable polyester-based film satisfies the requirements: (1) heat-shrinkage ratio in a width direction measured by shrinking the film for 10 seconds in 90° C. hot water is 50%-75%, (2) heat-shrinkage ratio in a longitudinal direction measured by shrinking the film for 10 seconds in 90° C. hot water is −6% or more and 14% or less, (3) heat-shrinkage ratio in the longitudinal direction measured by shrinking the film for 10 seconds in 70° C. hot water is −6% or more and 6% or less, and (4) irregularity of thickness in the width direction is 1%-20%.
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