Patent · US Expired

Polyester film having improved oxygen barrier, comprising poly(m-xyleneadipamide) and also an overlayer and a barrier coating, process for its production and its use

US7005169B2 · kind B2 · utility

2Cited by

14References

18Claims

0Family size

Assignee

Mitsubishi Polyester Film GmbH · US

Inventors

Oliver Klein · Saarlouis, DE
Herbert Peiffer · Mainz, DE
Gottfried Hilkert · Saulheim, DE

Key dates

Filing date	Jan 20, 2004
Grant date	Feb 28, 2006
Priority date	—
Expiry date	Mar 28, 2024

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31797
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

Biaxially oriented polyester films which have a polyester-containing base layer (B) which additionally comprises poly(m-xyleneadipamide) and has been provided on at least one side with an overlayer (A) which has been coated with a barrier layer (D), said barrier layer comprising polyvinyl alcohol and a copolymer of maleic acid and acrylic acid, feature improved optical properties such as high gloss and low opacity and very good barrier properties, in particular toward the passage of oxygen, and, as a consequence of their insensitivity toward moisture, are suitable as a packaging material for foods or other consumable items.

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