Biaxially-oriented polypropylene film with high mechanical strength

US5118566A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Thomas Wilhelm · Taunusstein, DE
• Lothar Bothe · Mainz, DE
• Guenther Crass · Taunusstein, DE
• Gunter Schloegl · Kelkheim, DE
• Winfried Muskalla · Eltville am Rhein, DE

Key dates

• Filing date: Jun 22, 1990
• Grant date: Jun 2, 1992
• Expiry date: Jun 22, 2010

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31913
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A biaxially-oriented film with high mechanical strength, which includes 69 to 94.99% by weight of a polyolefin, 5 to 30% by weight of a natural or synthetic resin having a softening point in the range from 70.degree. to 170.degree. C., and 0.01 to 1% by weight of a nucleating agent, based on the total weight of the film. A method for producing this film includes biaxially drawing the film at temperatures below the melting point of the polyolefin.