Process and apparatus for preparing the surface of a plastic mol

Details Process and apparatus for preparing the surface of a plastic mol Process and apparatus for preparing the surface of a plastic mol

1989-08-08

1991-06-25

Nguyen, Nam X.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204165, 204168, 204169, 204170, 427 39, 427 40, 427 41, 118620, 42218605, 422907, B05D 314

Patent

active

050264630

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.

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patent: 3291712 (1966-12-01), McBride
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patent: 3974750 (1976-08-01), Frank
patent: 4188273 (1980-02-01), Sano et al.
patent: 4298440 (1981-11-01), Hood

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