POLYESTER MULTI-LAYER FILM AND MANUFACTURING METHOD THEREFOR
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United States of America
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Apr 10, 2025
app pub date -
Mar 22, 2023
filing date -
Mar 22, 2023
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Abstract
A polyester multi-layer film of the present invention comprises: a substrate layer comprising polyester; and a skin layer located on at least one surface of the substrate layer, wherein the polyester multi-layer film suppresses generation of oligomers in the film and migration to the surface even in a high-temperature treatment process by satisfying a predetermined correlation between the concentration of cyclic oligomers in the film and a haze value before and after heat treatment, thereby maintaining transparency and visibility of the film in the long term.
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