Patent · US Expired

Process and apparatus for preparing the surface of a plastic molding by means of an electrical corona discharge

US5026463A · kind A · utility

20Cited by

10References

23Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Peter Dinter · Obermoschel, DE
Lothar Bothe · Mainz, DE
John D. Gribbin · Schlangenbad, DE

Key dates

Filing date	Aug 8, 1989
Grant date	Jun 25, 1991
Priority date	—
Expiry date	Aug 8, 2009

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S422/907
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Moldings having a thickness of 1 to 60 mm and made of flexible webs or rigid sheet of plastic are passed through a corona discharge treatment system consisting of high-voltage electrodes and a counter-electrode and a high-frequency alternating current voltage of 20 to 25 kHz and 20 to 70 kV is applied to the high-voltage electrodes by a generator. A corona discharge forms in the gap between the high-voltage electrodes and the counter-electrode. An aerosol formed by atomizing a liquid is blown into the corona discharge zone by means of an air or gas stream. The aerosol modifies the surface of the sheet-like molding in the desired manner.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.