Process for pretreating surfaces of plastic items

US5487810A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Siegfried Thurm · Meerbusch, DE
• Klaus Sommer · Heidelberg, DE
• Peter Bier · Krefeld, DE
• Andreas Elschner · Mülheim, DE
• Manfred Kowitz · Moers, DE
• Axel Sandquist · Monheim, DE

Key dates

• Filing date: Sep 16, 1994
• Grant date: Jan 30, 1996
• Expiry date: Sep 16, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31707
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

In order to improve the adhesion of coatings, especially metal coatings, to the surfaces of plastic components, the latter are pretreated in low-pressure plasma with a process gas containing sulphur hexafluoride (SF.sub.6) which is substantially free of oxygen, the plastic surfaces being kept free of fluorine deposits or inclusions during the pretreatment.