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Influence of corona treatment decay on print quality in water‐borne flexographic printing of low‐density polyethylene‐coated paperboard
Author(s) -
Mesic Behudin,
Lestelius Magnus,
Engström Gunnar
Publication year - 2005
Publication title -
packaging technology and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 50
eISSN - 1099-1522
pISSN - 0894-3214
DOI - 10.1002/pts.708
Subject(s) - paperboard , polyethylene , materials science , coated paper , corona (planetary geology) , composite material , inkwell , corona discharge , low density polyethylene , moisture , contact angle , carton , coating , waste management , electrical engineering , engineering , physics , astrobiology , venus , voltage
The decrease in the corona treatment effect with time and its influence on the flexographic printability of low‐density polyethylene‐coated paperboard were studied. After corona treatment, sheets were stored in different ways. Some sheets were stored in a laboratory atmosphere, while others were protected from exposure to light, air, moisture and dust in polyethylene bags. The tendency for ink to spread on the surfaces was studied using contact angle measurements. Printability was evaluated as print density, dot gain, uncovered (white) and mottling. The results obtained show that the surface energy of the protected sheets decreased with time, but not as much and not as quickly as that of the unprotected sheets. In the case of the protected sheets, the percentage uncovered areas and mottling remained constant, but for the unprotected sheets they increased with increasing time after the corona treatment. No significant differences were seen in the other print quality measures. Copyright © 2005 John Wiley & Sons, Ltd.