Simultaneous Analysis of Die Internal and External Flows in Slot Coating Process

2019 ◽  
Vol 52 (3) ◽  
pp. 253-258
Author(s):  
Won-Gi Ahn ◽  
Si Hyung Lee ◽  
Jaewook Nam ◽  
Byoungjin Chun ◽  
Hyun Wook Jung
Keyword(s):  
Simultaneous Analysis ◽  
Coating Process ◽  
Slot Coating ◽  
External Flows

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

2016 ◽  
Vol 28 (2) ◽  
pp. 159-164 ◽  
Author(s):  
Guang Lin Jin ◽  
Won-Gi Ahn ◽  
See Jo Kim ◽  
Jaewook Nam ◽  
Hyun Wook Jung ◽  
...  
Keyword(s):  
Coating Process ◽  
Slot Coating

Flow and Film-Forming Characteristics Analysis of Non-Newtonian Fluid Slot Coating

2014 ◽  
Vol 939 ◽  
pp. 539-546
Author(s):  
Wei Chu Shu ◽  
Tsai Fang Wu ◽  
Ren Haw Chen ◽  
Kuei Yuan Cheng ◽  
Chih Wei Hsieh
Keyword(s):  
Thin Film ◽  
Shear Rate ◽  
Newtonian Fluid ◽  
Process Parameters ◽  
Film Coating ◽  
Simulation Software ◽  
Coating Process ◽  
Thin Film Coating ◽  
Slot Coating ◽  
Simulation Results

The slot coating process in the production of polymer films has a wide range of applications. However, the process cannot be systemized. This study used the computational fluid dynamics software Polyflow to analyze the slot coating process and investigate the influence that the process parameters have on the characteristics of thin-film coating to reduce the time and cost consumed in the experimental methods. The rheological characteristics of the non-Newtonian fluid used in this study were first identified by conducting experiments, and then configured in the simulation software for fitting with mathematical models. In addition, the models of the slot coating process were constructed, and the Arbitrary Lagrangian-Eulerian (ALE) calculation methods were then used in the Polyflow software. The simulation results were then compared to the experimental results and the findings reported in relevant literature, to determine the influence that the process parameters have on the characteristics of thin-film coating. The simulation results were represented graphically in a coating window plot. The comparison results indicate that the viscosity-shear rate characteristic of the material in the shear rate range of optical film coating is an excellent fit for the Cross Law. When the coating speed is too high or the amount of fluid supply is insufficient, phenomena such as break lines, uneven thickness, and air entrainment can occur.

Operability coating window of dual-layer slot coating process using viscocapillary model

2016 ◽  
Vol 143 ◽  
pp. 122-129 ◽  
Author(s):  
Ho Suk Ji ◽  
Won-Gi Ahn ◽  
Ilyoung Kwon ◽  
Jaewook Nam ◽  
Hyun Wook Jung
Keyword(s):  
Coating Process ◽  
Slot Coating ◽  
Coating Window

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

2013 ◽  
Vol 11 (1) ◽  
pp. 19-29 ◽  
Author(s):  
Gui Hua Han ◽  
Si Hyung Lee ◽  
Won-Gi Ahn ◽  
Jaewook Nam ◽  
Hyun Wook Jung
Keyword(s):  
Flow Dynamics ◽  
Coating Process ◽  
Slot Coating

scholarly journals An Optimal Die Design for the Coating Uniformity of Non-Newtonian Liquids in Slot Coating Process

2011 ◽  
Vol 49 (3) ◽  
pp. 314-319 ◽  
Author(s):  
Si-Hyung Lee ◽  
Hyun-Jung Koh ◽  
Seo-Hoon Shim ◽  
Hyun-Wook Jung ◽  
Jae-Chun Hyun
Keyword(s):  
Die Design ◽  
Coating Process ◽  
Slot Coating ◽  
Coating Uniformity ◽  
Newtonian Liquids

Economics of coated paper production made from deinked pulp

TAPPI Journal ◽  
2013 ◽  
Vol 12 (4) ◽  
pp. 19-27
Author(s):  
PATRICK HUBER ◽  
LAURENT LYANNAZ ◽  
BRUNO CARRÉ
Keyword(s):  
Mechanical Properties ◽  
Optimization Methods ◽  
Coating Process ◽  
Coated Paper ◽  
Paper Production ◽  
Base Paper

The fraction of deinked pulp for coated paper production is continually increasing, with some mills using 100% deinked pulp for the base paper. The brightness of the coated paper made from deinked pulp may be reached through a combination of more or less extensive deinking, compensated by appropriate coating, to optimize costs overall. The authors proposed general optimization methods combined with Kubelka-Munk multilayer calculations to find the most economical combination of deinking and coating process that would produce a coated paper made from DIP, at a given target brightness, while maintaining mechanical properties.

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