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. 20, 2005
Filed:
Aug. 12, 2003
Herbert Peiffer, Mainz, DE;
Cynthia Bennett, Alzey, DE;
Guenther Crass, Taunusstein-Wehen, DE;
Gottfried Hilkert, Saulheim, DE;
Werner Roth, Eppstein, DE;
Herbert Peiffer, Mainz, DE;
Cynthia Bennett, Alzey, DE;
Guenther Crass, Taunusstein-Wehen, DE;
Gottfried Hilkert, Saulheim, DE;
Werner Roth, Eppstein, DE;
Mitsubishi Polyester Film GmbH, Wiesbaden, DE;
Abstract
The application discloses a transparent, biaxially oriented polyester film having a base layer at least 80% by weight of which is composed of a thermoplastic polyester, and having at least one outer layer, wherein the outer layer is composed of a polymer, or of a mixture of polymers, which comprises at least 40% by weight of ethylene 2,6-naphthalate units and up to 40% by weight of ethylene terephthalate units and/or units from cycloaliphatic or aromatic diols and/or dicarboxylic acids, with the proviso that the T2 value of the polyester film is above the T2 value of the base layer but below the T2 value of the outer layer, and at least one film surface has a surface tension of from 35 to 65 mN/m and/or has been provided with a functional coating of thickness from 5 to 100 nm. The film has low atmospheric oxygen transmission. It is particularly suitable for packaging uses, specifically for packaging foods and other consumable items, and for laminating, metallizing and printing.