Multilayer film suitable as a release sheet in the production of decorative laminate panels

US4925728A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Guenther Crass · Taunusstein, DE
• Lothar Bothe · Mainz, DE
• Gunter Schloegl · Kelkheim, DE

Key dates

• Filing date: Sep 11, 1987
• Grant date: May 15, 1990
• Expiry date: Sep 11, 2007

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/8305
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A biaxially stretch-oriented multilayer film is disclosed which is produced by coextrusion and is suitable as a release sheet in the production of decorative laminate panels having a matte surface finish. The film comprises a base layer essentially comprising polypropylene and at least one top layer. The top layer essentially comprises PA0 (a) 98.5% to 99.6% by weight of a propylene homopolymer and PA0 (b) 0.4% to 1.5% by weight of a polydiorganosiloxane, relative to the weight of the top layer.