Thermo-formable multilayer barrier film with the appearance and texture of paper

US7255902B2 · kind B2 · utility

Assignee

• Convenience Food Systems B.V. · NL

Inventors

• Ulrich Reiners · Neuenkirchen, DE
• Erik Jarund · Filipstad, SE
• Leif Linné · Wright Lane, SE

Key dates

• Filing date: May 8, 2001
• Grant date: Aug 14, 2007
• Expiry date: May 8, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31928
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A paper-like multilayer barrier film comprises a filled polypropylene layer and several unfilled layers. The filled layer contains 40-75% by wt. of inorganic fillers, forms one of the two outside layers of the film, and has a thickness of at least 40 μm. The unfilled layers include a barrier layer, a sealing layer, and optionally at least one adhesive layer. The ratio of the total thickness of the unfilled layers to the thickness of the filled layer is in the range of 1:8 to 1:1.2.