Opaque, heat sealable multilayer polyolefin films

US4666772A · kind A · utility

Assignee

• Wolff Walsrode AG · DE

Inventors

• Ingo Schinkel · Walsrode, DE
• Jürgen Bohner · Bad Waldsee, DE

Key dates

• Filing date: May 9, 1986
• Grant date: May 19, 1987
• Expiry date: May 9, 2006

Classification

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

Abstract

Heatsealable opaque multilayer films, particularly wrapping films, having a high sealing strength, at low sealing temperature, favorable optical properties and machine compatibility based on a film of a propylene polymer and a linear statistical ethylene copolymer of low density as the heat sealing layer.