|
Letter 21061
Dirtness due to corona treatment
+++
I work for a company that uses corona treatment to increase the
adhesion on polypropilene film. The main problem with this tretment
is the dirtness due to the reaction between the oxidised compounds
formed during the treatment and PEI which is present inside the
formulation of the coating we use. This dirtness pollutes the roll we
use to print and we have problems in adhesion. Do you have any
suggestions to solve this issue?
Alessandro Finelli
- Milano, Italy
+++
Try cleaning the chamber.
|
|
Trevor Crichton
R&D practical scientist - UK
|
+++
Hi,
If processing is in vacuum we use argon/oxygen ion beam for stable
increase of surface tension on variety of polymers and rubbers.
Otherwise, in air we use ultraviolet lamps designed to clean and
increase surface tension to about 45-55 dyne/cm commercially. There
is no contaminations since both methods do not involve arcing
(corona) discharges on the surface of the polymer.
Darek Molenda
- Toronto, Ontario, Canada
Dear Reader, please --
- Answer or follow-up on this subject (in non-commercial
fashion).
-
- Post a new
question or inquiry on a different subject.
-
 |