Opaque, matte, multilayer polypropylene film, process for the production thereof, and the use thereof

US5492757A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Detlef E. Schuhmann · Friedrichsthal, DE
• Adolf Wilhelm · Wiesbaden, DE
• Ursula Murschall · Nierstein, DE
• Herbert Peiffer · Mainz, DE
• Wolfgang Meyer · Rorschach, CH

Key dates

• Filing date: Apr 5, 1994
• Grant date: Feb 20, 1996
• Expiry date: Apr 5, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31913
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to an opaque, matte, multilayer polypropylene film having at least one matte surface which includes at least one base layer and at least one interlayer, and an outer layer applied to this interlayer. The base layer includes polypropylene and fillers. The interlayer includes a mixture or blend of two components I or II. Component I is a propylene homopolymer or a copolymer of .alpha.-olefins having 2 to 10 carbon atoms, or a terpolymer of .alpha.-olefins having 2 to 10 carbon atoms or a mixture or blend of said polymers. Component II is an HDPE or a blend of HDPE and a propylene homopolymer or a copolymer of .alpha.-olefins having 2 to 10 carbon atoms or a terpolymer having 2 to 10 carbon atoms. The outer layer essentially includes a propylene homopolymer or a copolymer of .alpha.-olefins having 2 to 10 carbon atoms or a terpolymer of .alpha.-olefins having 2 to 10 carbon atoms or a mixture or blend of said polymers.