Matt, flame-retardant, co-extruded polyester film, a method for the production thereof and the use of the same

US6872461B2 · kind B2 · utility

Assignee

• Mitsubishi Polyester Film GmbH · US

Inventors

• Ursula Murschall · Nierstein, DE
• Ulrich Kern · Ingelheim am Rhein, DE
• Guenther Crass · Taunusstein, DE
• Gottfried Hilkert · Saulheim, DE

Key dates

• Filing date: Jan 10, 2001
• Grant date: Mar 29, 2005
• Expiry date: Jan 10, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31786
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The invention relates to a co-extruded, biaxially oriented polyester films containing a flame-retardant agent which can be dissolved in the polyester. The film has a matt outer layer which contains a mixture and/or a blend of two components (I) and (II), whereby component (I) is a polyethylene terephthalate homopolymer, or a polyethylene terephthalate copolymer, or a mixture of polyethylene terephthalate homopolymers or copolymers and component (II) is a polymer containing at least one sulphonate group.