Study on the Optimized Condition of the Slot-Die Coating Process

슬롯다이 코팅의 최적화 조건에 관한 연구

  • 서응수 (영남대학교 기계공학부) ;
  • 예정우 (영남대학교 기계공학부) ;
  • 황중국 (동아대학교 융합과학기술학과) ;
  • 심재술 (영남대학교 기계공학부) ;
  • 채영석 (영남대학교 기계공학부)
  • Received : 2015.03.27
  • Accepted : 2015.05.18
  • Published : 2015.09.01


In this paper, we study the coating performance according to the slot-die conditions in the coating process. The quality of the slot-die coating depends on factors such as feeding speed of film, the viscosity of liquid, and the pressure applied to the slot-die. In this study, we determine the optimum conditions for a stable coating by performing 2-D and 3-D simulations. We carry out numerical simulations with respect to the feeding velocity of the film, the pressure of the slot-die inlet, and the viscosity of the coating liquid. Based on the results, the coating was the most reliable when the pressure of the inlet was $5kgf/cm^2$, the viscosity was about 100 cps and the velocity was 20 m/min.


Slot-die Coating;Printed Electronics;CFD;Flow;VOF(Volume Of Fluid)


Supported by : 중소기업청


  1. Ruschak, K. J., 1976, "Limiting Flow in a Premetered Coating Device," Chemical Engineering Science, Vol. 31, No. 11, pp. 1057-1060.
  2. Lee, K.Y., Liu, L. D. and Liu, T. J., 1992, " Minimum Wet Thickness in Extrusion Slot Coating," Chemical Engineering Science, Vol. 47, No. 7, pp. 1703-1713.
  3. Ning, C. Y., Tsai, C. C. and Liu, T. J., 1996, The Effect of Polymer Additives on Extrusion Slot Coating," Chemical Engineering Science, Vol. 51, No. 12, pp. 3289-3297.
  4. Carvalho, M. S. and Kheshgi, H. S., 2000, " Low-flow Limit in Slot Coating: Theory and Experiments," AIChE Journal, Vol. 46, No. 10, pp. 1907-1917.
  5. Yang, C. K., Wong, D. S. H. and Liu, T. J., 2004, "The Effects of Polymer Additives on the Operating Windows of Slot Coating," Polymer Engineering & Science, Vol. 44, No. 10, pp. 1970-1976.
  6. Chang, Y. R., Chang, H. M., Lin, C. F., Liu, T. J. and Wu, P. Y., 2007, "Three Minimum Wet Thickness Regions of Slot Die Coating," Journal of Colloid and Interface Science, Vol. 308, No. 1, pp. 222-230.
  7. Jang, I. and Song, S., 2011, " Numerical Analysis on Slot Die Coating and Viscocapillary Model with Gravity Effects," Proceedings of the KSME, pp.56-57.
  8. Park, J. H., Seong, J. W., Kang, H. K. and Shin, K. H., 2011, " A Study on the Optimized Condition of Slot-Die Printing Process," Proceedings of the KSME, pp. 197-198.
  9. Park, J. and Lee, C., 2013, " A Statistical Analysis for Slot-die Coating Process in Roll-to-roll Printed Electronics," Journal of the Korean Society of Manufacturing Process Engineers, Vol. 12 No.5, pp.23-29.