Claims
- 1. A process for the surface treatment of a web-shaped or sheet-shaped substrate by means of an electric corona discharge, comprising:
- (1) passing said substrate into a corona discharge zone lying between at least one voltage carrying electrode and at least one grounded counter electrode;
- (2) corona treating said substrate in said corona discharge zone by applying a high voltage current to said at least one voltage carrying electrode;
- (3) simultaneously introducing into said corona discharge zone an aerosol consisting of atomized liquid and either a gas or air stream, whereby said corona discharge and said aerosol introduction occurs simultaneously on both sides of said substrate in the region of said corona discharge for the purpose of reacting said liquid with said substrate zone.
- 2. The process as claimed in claim 1, wherein the atomized liquid consists of droplets having an average size of less than 5, in particular less than 3 micrometers, which have preferably been produced by atomization of the liquid with ultrasound.
- 3. The process as claimed in claim 1, wherein said atomization includes atomization of different liquids, said different liquids being blown by said air or gas stream onto opposite surfaces of said substrate in the region of said corona discharge zone.
- 4. The process as claimed in claim 1, wherein at least one of said surfaces of said substrate is exposed to a plurality of a corona discharge zone.
- 5. The process as claimed in claim 3, wherein at least one of said surfaces of said substrate is exposed to a plurality of a corona discharge zone.
- 6. A process according to claim 1, wherein said at least one voltage carrying electrode are coupled with a high frequency generator having an alternating current of 0.1 to 10 amps at a voltage of 5 to 100 kV and a frequency of 3 to 100 kHz.
Parent Case Info
This is a division of application Ser. No. 07/473,257 filed Jan. 31, 1990 now U.S. Pat. No. 5,024,819.
US Referenced Citations (12)
Foreign Referenced Citations (1)
Number |
Date |
Country |
722875 |
Feb 1955 |
GBX |
Non-Patent Literature Citations (1)
Entry |
Condensed Chemical Dictionary, 10th Ed. Hawley, 1981. |
Divisions (1)
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Number |
Date |
Country |
Parent |
473257 |
Jan 1990 |
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