Comparison of Rheological Behavior of Three Gel-Type Vehicles for Printing Ink

摘要

Three gel-type vehicles were synthesised and their rheological behavior was investigated in this paper. The main differences of three samples are the concentraton of resin (R-l? G-l> G-2) and gelata (R-l G-l< G-2). The results show that R-l is more temperature sensitive which might not favorable for the high speed printing. G-2 and G-l, which contain higher amount of gelling agent, might have a enhanced net-structure due to the reaction between gelling agent and resin. And the results of dynamic strain sweep and frequency sweep indicate that the gelata can give a good viscoelastic to the vehicle while the higher amount of resin might benefit the stability of vehicle. Although the most suitable ratio of gel-vehicle desired further discovery, the rheological behavior could be a proper means as to optimize the formula of ink.