| 초록 |
Slot coating process has been applied for many precise coating products. However, manufacturing uniform coating products is not a trivial task at high-speed operations because various flow instabilities or defects such as leaking, bubbles, ribbing, and rivulets are frequently observed in this process. It is no wonder, therefore, that many efforts to understand the various aspects of dynamics and coating windows of this process have been made both in academia and industry. In this study, flow dynamics within the coating bead in slot coating process has been investigated using the one-dimensional viscocapillary model by lubrication approximation and two-dimensional Flow-3D software. Especially, operability windows in both 1D and 2D cases with various slot die designs have been successfully portrayed, quantitatively corroborating the experimental results. |
