Date of Award
Master of Science
Chemical and Paper Engineering
Paper Engineering, Chemical Engineering and Imaging
Dr. Margaret K. Joyce
Dr. John Cameron
Dr. Dan Fleming
Masters Thesis-Open Access
Coating rheology has long been understood to be a key factor in the smooth operation and performance of a coater. As coaters run faster and formulations become more complex, the demands on a coating's rheology grow more stringent.
Silica based coating formulations present unique rheological challenges, thus providing the opportunity for coating formulators to improve their performance through rheological studies under various conditions of shear. Due to rheological restrictions (gelling), silica based coatings are generally applied at 25-26% solids which is very low as compared to calcium carbonate or clay based coating, at 68-70% solids. Consequently, any improvement in coatings solids will lead to enormous savings in dryer energy. In this study the rheology of various silica-based coatings were characterized. The effect of three important coating parameters: total solids, pigment to binder ratio, and pigment type on rheology were studied.
Tripathi, "Rheology of Silica Based Inkjet Coatings and Their Filterability" (2002). Master's Theses. 5067.