Process and device for surface pre-treatment of plastic by means

Details Process and device for surface pre-treatment of plastic by means Process and device for surface pre-treatment of plastic by means

1988-02-17

1990-05-29

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204165, 204168, 204169, 204170, 427 39, 427 40, 264 22, C07C 324

Patent

active

049293192

ABSTRACT:
For surface pre-treatment of a plastic article, such as a film sheet or the interior of a plastic molded article, by means of electrical corona-discharge, a device is provided having a generator 5 and a corona discharge device 11. The generator applied a high-frequency, high-voltage alternating current to the discharge electrodes 4 of the corona-discharge device 11. The grounded counterelectrode used is the metal core 2 of a roller 10 over whose peripheral coating 3 a film sheet 1 is transported. A housing 6 encompasses the electrodes 4 of the corona-discharge device 11 and is connected via a line 7 to an atomizer 8 in which a liquid is atomized to form an aerosol by means of a piezoelectrically operating ultrasonic vibration system or by two-component atomizer nozzles which operate at ultrasonic speed. A fan 9, the throughput rate of which can be regulated, is connected to the atomizer 8 and pushes the carrier gas, for example, air, for the aerosol through the atomizer into the corona-discharge device 11. Further corona-discharge devices can be present into which an aerosol of another liquid or only a reactive gas are fed.

REFERENCES:
patent: 3142630 (1964-07-01), Antokal et al.
patent: 3274089 (1966-09-01), Wolinski
patent: 3660549 (1972-05-01), Hawkins
patent: 3686374 (1972-08-01), Hawkins
patent: 4148851 (1979-04-01), Tani et al.
patent: 4571316 (1986-02-01), Naruse et al.
patent: 4615906 (1986-10-01), Kolbe et al.

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