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Effect of shim configuration on flow dynamics and operability windows in stripe slot coating process

Authors
Han, Gui HuaLee, Si HyungAhn, Won-GiNam, JaewookJung, Hyun Wook
Issue Date
1월-2014
Publisher
SPRINGER
Keywords
Stripe slot coating; Shim; Operability window; 3-D simulation; Slit channel geometry
Citation
JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, v.11, no.1, pp.19 - 29
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
Volume
11
Number
1
Start Page
19
End Page
29
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/99701
DOI
10.1007/s11998-013-9485-3
ISSN
1547-0091
Abstract
The slot coating method is a strong candidate for the manufacture of secondary batteries and electrodes for electronics. For the production of such devices, one may need to coat multiple lanes simultaneously which is usually done by implementing specially designed stripe shim inside the die manifold. The effects of shim configurations on the stripe-patterned coated film were analyzed in this study. We employed computational and experimental analyses to estimate flow patterns and corresponding desirable operating condition changes for uniform, converging and diverging slit channels. It was found that the slit channel shape, which is determined by the shim design, can manipulate the die-exit velocity distribution, capable of controlling edge shape of the crossflow film thickness profile. However, other than producing a uniform channel, this might decrease the scope of operability windows due to the aggravation of bead break-up near the edge of the slit channel.
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