Treatment corona shortage
Checking of working conditions
- Check the air-gap (the distance between electrodes and discharge rolls). Is it correct?
A bigger air-gap reduces the treatment. For measuring the air-gap use a pre-calibrated gauge made of plastic materials. It must be 1.5 mm for aluminium electrodes and 1.3 mm for ceramic electrodes (or ceramic discharge roll) on all electrodes width. - Is the generator working at the maximum power value?
A lower power output can decrease the treatment’s result. - Have you increased the working speed?
A higher working speed could reduce the treatment. If it is possible go more slowly. - If supplied, have you turned the R.P.V. (regulation of power proportional to the speed) function off?
If you make a test at slow working speed when R.P.V. function is off, you can increase the generator’s power even at very low speed with the consequence of increasing the corona discharge’s concentration. - If you have segmented electrodes, be sure of using only the segments of electrode that cover the film. A better discharge’s concentration helps to reach higher treatment’s results. Lift up all those segments of electrodes that do not cover the film. And remember: the generator will adapt itself automatically to the effective electrode-in-charge width.
Material technical data
Does the material contain a high quantity of slip agents?
High slip content reduces the treatment’s effect. If it is possible, reduce, as much as you can, the slip agents or additives you’re using.