Heat sealable multilayer films with low permeability to gas and their use as packaging material

US4668575A · kind A · utility

Assignee

• Wolff Walsrode AG · DE

Inventors

• Ingo Schinkel · Walsrode, DE
• J/u/ rgen B/o/ hner · Walsrode, DE

Key dates

• Filing date: May 9, 1986
• Grant date: May 26, 1987
• Expiry date: May 9, 2006

Classification

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

Abstract

Heat sealable, composite film comprising a polypropylene film, at least one adhesion layer, at least one gas-barrier layer and at least one heat-sealing layer of a linear statistical ethylene copolymer of low density.