Heat and Mass Transfer Mechanisms of Particle Dispersed Systems during Late-Stage of Drying Ink

Abstract

In this report, we focused on pigments and polymers, which are considered to have an influence on drying speed among ink components, and quantitatively evaluated their effects. As an experiment, we measured the drying process of ink liquid film by forced convection using a petri dish and an actual inkjet printer printing machine as a model. We investigated the relationship between the evaporation rate by changing the molecular weight and the amount of polymer added, and attempted to elucidate the mechanism of the influence of pigments and polymers on the late drying process in terms of heat and mass transfer by making integrated observations based on viscosity coefficient, temperature measurement, and visualized images.