Patent · US Expired

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

US6991837B2 · kind B2 · utility

3Cited by

14References

16Claims

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	Jan 31, 2006
Priority date	—
Expiry date	Feb 7, 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 which is coated on at least one side with a barrier layer (D), the 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 with respect to oxygen passage, and are also suitable as packaging materials for foods or other consumable items as a consequence of their insensitivity toward moisture.

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