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:
Nov. 21, 2000
Filed:
Mar. 24, 1999
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 a mixture of polymers which comprises at least 40% by weight of ethylene 2,6-naphthalate units and up to 60% by weight of ethylene terephthalate units and/or of units from aliphatic, including cycloaliphatic, or aromatic diols and/or 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 outer layer, and the base layer comprises particles. The film has low oxygen transmission. It is particularly suitable for packaging applications, specifically for packaging foods and other consumable items, or as a can liner, a lid film or a thermo-transfer ribbon.