Polyester film

US5032458A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Hermann Dallmann · Wiesbaden, DE
• Werner Schaefer · Hofheim, DE
• Wolfgang Gawrisch · Gau-Bischofsheim, DE
• Hartmut Hensel · Schlangenbad, DE

Key dates

• Filing date: Sep 28, 1990
• Grant date: Jul 16, 1991
• Expiry date: Sep 28, 2010

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31797
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention concerns a polyester film with improved abrasion resistance, dimensional stability, drawability and slip properties. The film is characterized by the fact that it contains 0.005 to 5.0% by weight of organic, preferably hardened or crosslinked, particles with narrow particle size distribution in a range between 0.01 and 5 microns, as well as a nucleating agent in an amount from 0.01 to 10% by weight, both values related to the weight of the polymers which form the film.