Patent · US Expired

Polyester film with a high oxygen barrier, the use of the film and process for its production

US6534169B2 · kind B2 · utility

9Cited by

22References

21Claims

0Family size

Assignee

Mitsubishi Polyester Film GmbH · US

Inventors

Herbert Pfeiffer · Munich, DE
Cynthia Bennett · Wiesbaden, DE
Gottfried Hilkert · Saulheim, DE

Key dates

Filing date	Mar 24, 1999
Grant date	Mar 18, 2003
Priority date	—
Expiry date	Mar 24, 2019

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31786
WIPO fieldSurface technology, coating
WIPO sectorChemistry

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 units from aliphatic, cycloaliphatic, or aromatic diols and/or dicarboxylic acids, with the proviso that the base layer has a diethylene glycol content in the range from 0.9 to 3.0% by weight.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.