抄録
Influence of polymer additives on transfer ratio in gravure printing have been experimentally studied with a liquid transfer model test consisted of a static lower plate with a very small cavity and a movable upper flat plate. Dilute polymer solutions have examined and those results were compared with those of Newtonian liquids. Transferring processes of the liquids were observed and the amount of transferred liquids were estimated with image processing. Transfer ratios evaluated from the tests with polymer solutions were higher than those obtained with Newtonian liquids in low Capillary number region. On the other hand, almost same transfer ratios were obtained regardless of polymer additive in high Capillary number conditions. In the case of Newtonian liquid at low Capillary number region, the contact lines of transferred liquids were easily moved and the liquid flowed down to the cavity. The contact lines of polymer solutions didn't moved even in the same conditions.
