Effect of shim configuration on internal die flows for non-Newtonian coating liquids in slot coating process

Guang Lin Jin; Won-Gi Ahn; See Jo Kim; Jaewook Nam; Hyun Wook Jung; Jae Chun Hyun

Korea-Australia Rheology Journal, Vol.28, No.2, 159-164, May, 2016

DOI10.1007/s13367-016-0015-6 Export Citation

Effect of shim configuration on internal die flows for non-Newtonian coating liquids in slot coating process

Guang Lin Jin, Won-Gi Ahn, See Jo Kim¹, Jaewook Nam^{2, †}, Hyun Wook Jung^†, and Jae Chun Hyun

Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea
¹School of Mechanical Engineering, Andong National University, Andong 36729, Republic of Korea
²School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea

E-mail:,

In this study, a strategy for designing optimal shim configuration inside a slot die is suggested to assure the uniform coating flow distribution of various non-Newtonian shear-thinning liquids at the die exit in a slot coating system. Flow patterns of non-Newtonian liquids inside the slot die, via three-dimensional computations, have been compared using various shim geometries which can adjust the flow region in a slot manifold. The rather non-uniform (parabolic) velocity distributions of shear-thinning liquids at the die exit under the basic shim condition could be effectively flattened by the modification of shim geometry without the change of die manifold structure. Dimensions of hybrid shims for controlling flow features at edge and center regions within slit channel are positively tuned, according to the shear-thinning level of coating liquids.

Keywords:slot die;shim configuration;internal die design;non-Newtonian liquid;slot coating

[References]

Ahn WG, Lee SH, Nam J, Jung HW, Korean J. Chem. Eng., 32(7), 1218 (2015)
Bhamidipati KL, Didari S, Bedell P, Harris TAL, J. Non-Newton. Fluid Mech., 166(12-13), 723 (2011)
Byun CW, 2012, Slot die, Korea Patent 2012014511.
Carvalho MS, Kheshgi HS, AIChE J., 46(10), 1907 (2000)
Cohen ED, Gutoff EB, 1992, Modern Coating and Drying Technology, 1st ed., VCH Publishers, New York.
Gates ID, 1999, Slot coating flows: Feasibility, quality, PhD Thesis, University of Minnesota.
Han GH, Lee SH, Ahn WG, Nam J, Jung HW, J. Coat. Technol. Res., 11, 19 (2014)
Higgins BG, Scriven LE, Chem. Eng. Sci., 35, 673 (1980)
Jeon SW, Son YW, Kang SM, Lee HM, 2013, Slot die coater for production of electrodes, Korea Patent 20130110507.
Kistler SF, Schweizer PM, 1997, Liquid Film Coating, Chapman and Hall, London.
Koh HJ, Kwon I, Jung HW, Hyun JC, Korea-Aust. Rheol. J., 24(2), 137 (2012)
Lee KY, Liu LD, Polym. Eng. Sci., 29, 1066 (1989)
Lee SH, Koh HJ, Ryu BK, Kim SJ, Jung HW, Hyun JC, Chem. Eng. Sci., 66, 4953 (2011)
Lee SH, Koh HJ, Shim SH, Jung HW, Hyun JC, Korean Chem. Eng. Res., 49(3), 314 (2011)
Lee SH, Kim SJ, Nam J, Jung HW, Hyun JC, J. Coat. Technol. Res., 11, 47 (2014)
Matsubara Y, Polym. Eng. Sci., 19, 169 (1979)
McKelvey JM, Ito K, Polym. Eng. Sci., 11, 258 (1971)
Nam J, Scriven LE, Carvalho MS, J. Comput. Phys., 228, 4549 (2009)
Park SH, Lee CG, Lim YH, 2014, Movable member for slot die coater and slot die coater for production of electrodes using the same, Korea Patent 20140089035.
Pearson JRA, Trans. J. Plastics Inst., 32, 239 (1964)
Romero OJ, Scriven LE, Carvalho MS, J. Non-Newton. Fluid Mech., 138(2-3), 63 (2006)
Ruschak KJ, Weinstein SJ, Polym. Eng. Sci., 37(12), 1970 (1997)
Sartor L, 1990, Slot coating: Fluid mechanics and die design, PhD Thesis, University of Minnesota.
Tanwar J, Vinjamur M, Scriven LE, AIChE J., 53(3), 572 (2007)
Tsuda T, J. Fluid Sci. Tech., 4, 735 (2009)
Yuan SL, Polym. Eng. Sci., 35(7), 577 (1995)

[Referenced By]

[Related Articles]

[1] Ahn WG, Lee SH, Nam J, Jung HW, Korean J. Chem. Eng., 32(7), 1218 (2015)

[2] Bhamidipati KL, Didari S, Bedell P, Harris TAL, J. Non-Newton. Fluid Mech., 166(12-13), 723 (2011)

[3] Byun CW, 2012, Slot die, Korea Patent 2012014511.

[4] Carvalho MS, Kheshgi HS, AIChE J., 46(10), 1907 (2000)

[5] Cohen ED, Gutoff EB, 1992, Modern Coating and Drying Technology, 1st ed., VCH Publishers, New York.

[6] Gates ID, 1999, Slot coating flows: Feasibility, quality, PhD Thesis, University of Minnesota.

[7] Han GH, Lee SH, Ahn WG, Nam J, Jung HW, J. Coat. Technol. Res., 11, 19 (2014)

[8] Higgins BG, Scriven LE, Chem. Eng. Sci., 35, 673 (1980)

[9] Jeon SW, Son YW, Kang SM, Lee HM, 2013, Slot die coater for production of electrodes, Korea Patent 20130110507.

[10] Kistler SF, Schweizer PM, 1997, Liquid Film Coating, Chapman and Hall, London.

[11] Koh HJ, Kwon I, Jung HW, Hyun JC, Korea-Aust. Rheol. J., 24(2), 137 (2012)

[12] Lee KY, Liu LD, Polym. Eng. Sci., 29, 1066 (1989)

[13] Lee SH, Koh HJ, Ryu BK, Kim SJ, Jung HW, Hyun JC, Chem. Eng. Sci., 66, 4953 (2011)

[14] Lee SH, Koh HJ, Shim SH, Jung HW, Hyun JC, Korean Chem. Eng. Res., 49(3), 314 (2011)

[15] Lee SH, Kim SJ, Nam J, Jung HW, Hyun JC, J. Coat. Technol. Res., 11, 47 (2014)

[16] Matsubara Y, Polym. Eng. Sci., 19, 169 (1979)

[17] McKelvey JM, Ito K, Polym. Eng. Sci., 11, 258 (1971)

[18] Nam J, Scriven LE, Carvalho MS, J. Comput. Phys., 228, 4549 (2009)

[19] Park SH, Lee CG, Lim YH, 2014, Movable member for slot die coater and slot die coater for production of electrodes using the same, Korea Patent 20140089035.

[20] Pearson JRA, Trans. J. Plastics Inst., 32, 239 (1964)

[21] Romero OJ, Scriven LE, Carvalho MS, J. Non-Newton. Fluid Mech., 138(2-3), 63 (2006)

[22] Ruschak KJ, Weinstein SJ, Polym. Eng. Sci., 37(12), 1970 (1997)

[23] Sartor L, 1990, Slot coating: Fluid mechanics and die design, PhD Thesis, University of Minnesota.

[24] Tanwar J, Vinjamur M, Scriven LE, AIChE J., 53(3), 572 (2007)

[25] Tsuda T, J. Fluid Sci. Tech., 4, 735 (2009)

[26] Yuan SL, Polym. Eng. Sci., 35(7), 577 (1995)