High-speed roll coating with complex rheology fluids

被引：0
|
作者：
G. Ascanio
P. J. Carreau
P. A. Tanguy
机构：
[1] National University of Mexico,Center of Applied Sciences and Technological Development (CCADET)
[2] Ecole Polytechnique,Center for Applied Research on Polymers and Composites (CREPEC), Department of Chemical Engineering
[3] Ecole Polytechnique,Department of Chemical Engineering, Research Unit on Industrial Flow Processes (URPEI)
来源：
Experiments in Fluids | 2006年 / 40卷
关键词：
Capillary Number; Roll Speed; Coating Color; Extensional Viscosity; Kaolin Clay;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The flow of high solids content suspensions and coating colors through the deformable gap of counter-rotating rolls at high speed was investigated. Measurements of nip pressure profiles in a laboratory film coater were conducted and flow visualization experiments downstream the nip were carried out. A high-speed video system allowed showing the formation, elongation and break up of filaments that yield the misting droplets. The role of rheology on misting was also investigated using shear and extensional data. Results show that misting, mainly generated by film splitting, is reduced when the extensional viscosity of the color is larger.
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页码：1 / 14
页数：13
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