Multiple layer packaging films and packages formed thereof

US4910085A · kind A · utility

Assignees

• American National Can Company · US
• Kendall McGaw Laboratories, Inc. · US

Inventors

• Jean E. Raniere · Tecate Mission Road, US
• Steven L. Smith · Lake Forest, US
• Russell P. Gehrke · Neenah, US
• Richard E. Johnson · Appleton, US

Key dates

• Filing date: Oct 11, 1988
• Grant date: Mar 20, 1990
• Expiry date: Oct 11, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31797
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention discloses a multiple layer film useful in packaging, and the packages made therefrom. A first layer of the film is a material containing an ester group, a polycarbonate or a polyether block amide copolymer. A second layer of the film is a sealant, preferably polypropylene polymer blended with an elastomeric styrene ethylene butylene styrene copolymer. A third functionally adhesive layer is between the first and second layers. The composition of the third adhesive layer is typically either a polypropylene modified with a carboxy group such as an organic acid or anhydride or a styrene ethylene butylene styrene copolymer.