SEALABLE PEELABLE POLYESTER FILMS
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United States of America Patent
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Issued Date -
Aug 15, 2024
app pub date -
Sep 9, 2022
filing date -
Sep 9, 2021
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Abstract
A polymeric film comprising a polyester substrate layer and a heat-scalable polymeric layer disposed on one surface of said polyester substrate layer, wherein the heat-scalable polymeric layer comprises copolyester A having a glass transition temperature Tg(A) in an amount WA and copolyester B having a glass transition temperature Tg(B) in an amount WB, wherein: (i) WA>WB; (ii) WA is at least 50 wt % by total weight of the heat-scalable polymeric layer; (iii) WB is at least 10 wt % by total weight of the heat-scalable polymeric layer; (iv) Tg(A)>Tg(B); (v) Tg(B) is in the range of −35° C. to −10° C.; and (vi) Tg(A) is preferably in the range of −15° C. to 5° C.
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