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:
Apr. 25, 2000
Filed:
May. 14, 1998
Mitsubishi Polyester Film GmbH, Wiesbaden, DE;
Abstract
The application discloses a transparent, biaxially oriented polyester film having a base layer of at least 80% by weight which is composed of at least a thermoplastic polyester, and having at least one cover layer, wherein the cover layer is composed of a polymer or a mixture of polymers which comprises at least 40% by weight of ethylene 2,6-naphthalate units and optionally up to 60% by weight of ethylene terephthalate units and/or optionally units from aliphatic, cycloaliphatic or aromatic diols, and/or optionally aliphatic, cycloaliphatic and aromatic dicarboxylic acids, with the proviso that the T.sub.g 2 value of the polyester film is above the T.sub.g 2 value of the base layer but below the T.sub.g 2 value of the cover layer. The film has low atmospheric oxygen transmission. It is particularly suitable for packaging applications, specifically for packaging foodstuffs and other consumable items.