The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 03, 1996
Filed:
Oct. 06, 1995
Bobby J Sublett, Kingsport, TN (US);
Eastman Chemical Company, Kingsport, TN (US);
Abstract
Disclosed are thermoplastic copolyesters having improved gas barrier properties and which can be produced having little or no acetaldehyde. These copolyesters are especially useful in the manufacture of food packaging products, foodtrays, film and beverage bottles which require good oxygen and carbon dioxide barrier properties. The copolyesters comprise repeat units from about 10 to 100 mole percent repeat units from naphthalene dicarboxylic acid, about 90 to 0 mole percent repeat units from terephthalic acid and repeat units from essentially 100 mole percent 1,4-cyclohexanedimethanol, wherein said 1,4-cyclohexanedimethanol has a cis isomer content of at least 50% said copolyester having an I.V. of about 0.4-1.2.