Self-adhesive lidding film for packaging electronic components

US5545457A · kind A · utility

Assignee

• BEIERSDORF AG · DE

Inventors

• Christian Harder · Hamburg, DE
• Bernd Howe · Schenefeld, DE
• Karl Kuhlmann

Key dates

• Filing date: Feb 25, 1994
• Grant date: Aug 13, 1996
• Expiry date: Feb 25, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31797
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

Self-adhesive lidding film for packaging electronic components, whose adhesive layer is covered with a non-adhesive covering in the center, wherein the adhesive layer comprises a mixture of two acrylate adhesive compositions of different polarity, the first, highly polar component containing from 1 to 20%, in particular from 6 to 10%, especially about 8%, of acrylic acid in the monomer composition, and the other, nonpolar component containing from 5 to 50%, in particular from 10 to 30%, especially about 20%, of stearyl acrylate in the monomer composition, and where an adhesion promoter or primer is present between the adhesive layer and the film support of the lidding film.