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http://dx.doi.org/10.17702/jai.2015.16.1.15

Rheological Properties and Roll Coating Dynamics of Basecoats for Precoated Automotive Metal Sheets  

Lee, Dong Geun (Department of Chemical and Biological Engineering, Korea University)
Hwang, Ji Won (Department of Chemical and Biological Engineering, Korea University)
Kim, Kyung Nam (PPG Industries Korea)
Noh, Seung Man (Research Center for Green Fine Chemicals, Korea Research Institute of Chemical Technology)
Jung, Hyun Wook (Department of Chemical and Biological Engineering, Korea University)
Publication Information
Journal of Adhesion and Interface / v.16, no.1, 2015 , pp. 15-21 More about this Journal
Abstract
In this study, rheological properties and flow dynamics in roll coating process of basecoat paints have been investigated for automotive precoated metal (PCM) sheet applications. Various rheological properties for basecoats with three colors (black, blue, and silver), such as shear viscosity data at room temperature and elastic/viscous moduli under thermal curing condition, have been measured using a rotational rheometer. It is found that the relative portion of function groups inside basecoats and their viscosity level have greatly affected the formation of crosslinked networks by thermal curing. Also, operability coating windows for basecoats have been established in three-roll coating process system by observing their flow instabilities such as ribbing and cascade. It is confirmed that rheological approaches applied in this study have been usefully applied to develop environmentally-friendly PCM coating technology and optimally control the coating operations for non-Newtonian PCM paints.
Keywords
Roll coating; precoated metal (PCM) sheet; basecoats; rheology; coating window; flow instabilities;
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  • Reference
1 U. Poth, Automotive Coatings Formulation, Vincentz, Hannover (2008).
2 A. E. Matthews and G. M. Davies, Proc. IMechE Part B: J. Eng. Manufac., 211, 319 (1997).
3 S. J. Weinstein and K. J. Ruschak, Annu. Rev. Fluid Mech., 36, 29 (2004).   DOI
4 H. D. Hwang, J. I. Moon, Y. J. Lee, H. J. Kim, J. H. Hyun, S. M. Noh, C. Y. Kang, J. W. Lee, J. H. Nam, and J. M. Park, J. Adhesion Interface, 10, 155 (2009).
5 J. Y. Lee, M. S. Yi, H. C. Jeong, J. T. Kim, J. H. Nam, S. M. Noh, and H. W. Jung, J. Coating. Tech. Res., 11, 697 (2014).   DOI
6 J. H. Lee, S. K. Han, J. S. Lee, H. W. Jung, and J. C. Hyun, Korea-Aust. Rheol. J., 22, 75 (2010).
7 F. V. Lopez and M. Rosen, Latin Am. Appl. Res., 32, 247 (2002).
8 H. J. Streitberger and K. F. D.ssel, Automotive Paints and Coatings, 2nd Ed., Wiley-VCH, Weinheim (2008).
9 J. H. Kim, I. J. Lee, S. M. Noh, C. Y. Kang, J. H. Nam, and H. W. Jung, Polymer-Korea, 35, 574 (2011).
10 D. J. Coyle, C. W. Macosko, and L. E. Scriven, AIChE J., 36, 161 (1990).   DOI
11 S. K. Han, D. M. Shin, H. Y. Park, H. W. Jung, and J. C. Hyun, Eur. Phys. J. -Spec. Top., 166, 107 (2009).   DOI
12 J. W. Hwang, K. N. Kim, G. S. Lee, J. H. Nam, S. M. Noh, and H. W. Jung, Prog. Org. Coat., 76, 1666 (2013).   DOI   ScienceOn
13 B.-S. Chiou and S. A. Khan, Macromolecules, 30, 7322 (1997).   DOI
14 G. P. Cao, W. J. Chen, and X. B. Liu, Polym. Degrad. Stabil., 93, 739 (2008).   DOI
15 I. J. Lee, S. Park, S. M. Noh, H. W. Jung, and J. M. Park, Prog. Org. Coat, 76, 917 (2013).   DOI   ScienceOn