What are the factors that affect ink adhesion in PE film printing?
Causes the liquid packing membrane to occur the ink adhesive force not to be high:The 1. substrates of corona treatment up to less than 40 dynes / cm, dense, smooth surface and ink poor affinity.2. color masterbatch in the oily material is not enough to add, although the gloss increased, the friction coefficient decreased, but the printing fastness has been reduced, the heat sealing fastness decreased, so the selection of color masterbatch is essential. Improve the bonding fastness of ink to printing base material, and strengthen the compatibility of adhesive material in printing ink and printing material film. The solvent with good swelling or solubility of the printing base film is selected to increase the content of the binder in the ink and increase the amount of the tackifier resin in the ink so as to improve the cohesiveness of the ink.3., add solvent maladjustment, inconsistent with the actual standards.4., ink is too old and impurities, must be filtered treatment.5. add solvent containing moisture.
Liquid packaging film printing when there is noise, after the roll adhesionPlastic film gravure after coiling, after segmentation cutting into package bags stacked after printing surface between ink or ink and printing the blank face stuck together, can not be separated (pull is caused by the loss, scrap). It should be analyzed from the reasons that lead to adhesion, such as sticking of ink, humidity, pressure and so on
Ink fastness is not good, easy to decolorization
