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A macroscopic mathematical model for tensioned‐web slot coating
Author(s) -
Lin FangHo,
Liu ChiMing,
Liu TaJo,
Wu PingYao
Publication year - 2008
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.20927
Subject(s) - coating , materials science , viscosity , lubrication , tension (geology) , mechanical engineering , flow (mathematics) , composite material , mechanics , engineering , physics , compression (physics)
Abstract A mathematical model was developed to predict the performance of tensioned‐web slot coating (TWSC), in particular, the minimum wet thickness. The model was based on the lubrication approximation for the coating solution flow and a simplified membrane theory for the moving web. The theoretical predictions compared reasonably well with available experimental data. The effects of fluid viscosity, web tension, coating speed, and wrapping angle on the performance of TWSC were evaluated. An example was presented to illustrate how die lip design could be varied to improve its performance. POLYM. ENG. SCI., 2008. © 2007 Society of Plastics Engineers