Sealable composite polypropylene film and processes for producing and using it

US5932157A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Thomas Dries · Bad Kreuznach, DE
• Gunter Schloegl · Kelkheim, DE
• Walter Spaleck · Bocholt, DE
• Andreas Winter · Königstein, DE

Key dates

• Filing date: May 17, 1996
• Grant date: Aug 3, 1999
• Expiry date: May 17, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31913
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A composite film is described which has at least one base layer which predominantly comprises polypropylene, and at least one top layer. The top layer is sealable and comprises a homopolymer of an olefin. A process for producing the composite film, the top layer olefin homopolymer and packaging material made from the film also are described.