Patent · US Expired

Multilayer, biaxially oriented polyester film, process for its production and its use

US6984437B2 · kind B2 · utility

1Cited by

15References

13Claims

0Family size

Assignee

Mitsubishi Polyester Film GmbH · US

Inventors

Bart Janssens · Wiesbaden, DE
Herbert Peiffer · Mainz, DE
Gottfried Hilkert · Saulheim, DE

Key dates

Filing date	Oct 10, 2003
Grant date	Jan 10, 2006
Priority date	—
Expiry date	Oct 10, 2023

Classification

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

Abstract

Three-layer, highly oriented polyester films having an A-B-C layer construction, preferably made of polyethylene terephthalate, which, in addition to a base layer B, have a smooth surface layer A which contains no external particles and a rough surface layer C which contains external particles such as antiblocking agents or pigments, preferably SiO2, in defined amounts and particle sizes, feature in particular good producibility and processibility, high gloss of the film surface A and low opacity. The very smooth surface A is suitable in particular for coating with materials, for example SiOx, by means of plasma polymerization of hexamethyldisiloxane by the CVD or PECVD method, which provides the film with a high oxygen barrier and is suitable in particular as packaging for light- and air-sensitive foods or other consumable items.

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