Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

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
Download PDF
⟨ Previous Next ⟩

Abstract

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.

본 연구에서는 코팅 공정에 사용되는 슬롯다이(slot-die)에 대해 조건에 따른 코팅 성능을 연구하였다. 슬롯다이 코팅은 코팅 되는 필름의 속도, 코팅액의 점도 그리고 슬롯다이로 주입 되는 압력에 따라 코팅 품질이 많이 달라진다. 따라서 본 논문에서는 CFD 코드를 이용하여 안정적인 코팅을 위한 최적의 조건을 찾았다. 다양한 코팅액의 점도와 슬롯다이 입구의 압력 그리고 코팅 필름의 속도에 대해서 해석을 수행하였다. 그 결과로 $5kgf/cm^2$의 압력과 100cps 의 점도 그리고 20m/min 의 속도 조합에서 가장 안정적으로 코팅액이 잘 도포되었다.

Keywords

References

  1. Ruschak, K. J., 1976, "Limiting Flow in a Premetered Coating Device," Chemical Engineering Science, Vol. 31, No. 11, pp. 1057-1060. https://doi.org/10.1016/0009-2509(76)87026-1
  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. https://doi.org/10.1016/0009-2509(92)85018-7
  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. https://doi.org/10.1016/0009-2509(95)00396-7
  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. https://doi.org/10.1002/aic.690461003
  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. https://doi.org/10.1002/pen.20200
  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. https://doi.org/10.1016/j.jcis.2006.11.054
  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. https://doi.org/10.14775/ksmpe.2013.12.6.023