| Résumé : |
Production problems can arise with UV curing when insufficient UV light is availeble to cure the ink/coating. Tnis paper is about how to achieve the desired quality.
For most printers, converters and coaters of metal sheets, wood products, plastics and other substrates, UV-cured inks and coatings are preferred for both function and results, producing high quality images, with excellent adhesion and abrasion resistance. To produce a beautifully decorated, transfer-resistant product, there are many production concerns that must be addressed by the Coating or Print Managers and their staff. Potential problems range from miner issues, such as the substrate surface, printing press or coater applicator condition and limitations, ink or coating quality and thickness to the UV curing system itself. After production comes transporting the finished product without any transit abrasion and finally, passing your customer's incoming QC inspection. As a result, there are many sleepless nights for these resilient and well-tested Print and Coating Managers. Fortunately, there is 'light at the end of the tunnel', no pun intended, for those that have these production and sleep issues.
In many cases, there is a direct correlation between the Print/Coating Manager's sleepless nights and the performance limitation of the UV lamp system used in an attempt to shine enough of that important and mandatory UV light to successfully cure the ink/coating. Usually, the greater the amount of UV light, the better the cure and you are problem free. If there's inadequate UV light to cure the ink/ coating, then you have problems and sleep issues become common occurrences. While that is a basic rule, it's really more complex than that. |
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Performance limitations in curing thick pigmented inks and coatings in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 206, N° 4626 (11/2016)
