| 초록 |
Flow dynamics and stability of rigid and deformable roll coatings have been experimentally investigated, complying with the previous theoretical results. Wet coating thickness and meniscus position in downstream regime have been measured under the various process conditions using flow visualization technique. Moreover, in case of deformable roll coating operations with positive and negative gap conditions, the changes of roll shape have been observed. It has been found that the softer deformable roll cover leads to thicker coating thickness and higher meniscus position. Also, coating windows in rigid and deformable roll coatings have been established. Softness of deformable roll cover makes the system more stable. |
