Films and containers of heat resistant copolyesters
AssigneeEastman Kodak Company
InventorsWayne P. Pruett, Charles W. Ramsey, Sarah J. Webb, Joey C. Carico
Life of this patent
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Abstract
Disclosed are films, containers and container liners comprising a copolyester having repeat units from terephthalic acid and 1,4-cyclohexanedimethanol, and a hindered phenolic antioxidant.
Claims13
A substantially amorphous and substantially nonoriented film having improved dimensional stability, flexibility and resistance to discoloration when subjected to temperatures of 450.degree. F. for at least 60 minutes, said film having a thickness of less than 2.5 mils and comprising a copolyester having repeat units from at least 80 mol % terephthalic acid and at least 90 mol % 1,4-cyclohexanedimethanol, said copolyester having an I.V. of about 0.7-1.1, and a stabilizing amount of a hindered phenolic antioxidant.
A container comprising a body and a lid, said lid being a substantially amorphous and substantially nonoriented film having improved dimensional stability, flexibility and resistance to discoloration when subjected to temperatures of 450.degree. F. for at least 60 minutes, said film having a thickness of less than 2.5 mils and comprising a copolyester having repeat units from at least 80 mol % terephthalic acid and at least 90 mol % 1,4-cyclohexanedimethanol, said copolyester having an I.V. of about 0.7-1.1, and a stabilizing amount of a hindered phenolic antioxidant.
A container comprising a body portion having at least one layer of a substantially amorphous and substantially nonoriented film having improved dimensional stability, flexibility and resistance to discoloration when subjected to temperatures of 450.degree. F. for at least 60 minutes, said film having a thickness of less than 2.5 mils and comprising a copolyester having repeat units from at least 80 mol % terephthalic acid and at least 90 mol % 1,4-cyclohexanedimethanol, said copolyester having an I.V. of about 0.7-1.1, and a stabilizing amount of a hindered phenolic antioxidant.
Dependencies are inferred from the claim text.