Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Henkel Kommanditgesellschaft Auf Aktien

Horst Kleinert

Karl-Heinz Rogmann

Horst Hoffmann

Bernd Schultrich

Peter Siemroth

Joerg Gehrke

Sven Grosser

The invention relates to a method for adhesive bonding a PVC surface comprising cleaning a PVC surface with an aqueous alkaline cleaning composition and applying an adhesive to the cleaned PVC surface.

Cleaning agent for PVC surfaces

A process and an apparatus that can be used for surface preparation and treatment of a metal workpiece surface, for example in a processing stage prior to adhesive assembly, without using environmentally harmful materials. The process comprises triggering and maintaining pulsed unipolar arc discharges between an electrode wired as an anode and a workpiece surface wired as a cathode, with the arc discharges following one another with a timing, number, and speed such that they do not cause macroscopic melting of the workpiece surface while ensuring complete extinction of the individual arc discharges. The apparatus comprises an electrode as the anode and the workpiece as the cathode, and a generator or component for generating electrical pulses.

Process for treatment of metal workpiece surface by electrical discharges

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Ottendorf-Okrilla, Germany

Horst Kleinert