The Smaller - The Better? Influence of Dispersion Quality on the Performance of Toner Ingredients

摘要

In general an electrophotographic toner consists of pigment, charge control agent (CCA) and wax which are homogeneously dispersed into a resin and, if necessary, contains external additives. For dispersing the toner ingredients into solid matrices in conventional toner processes, two roll mills, extruders or kneaders can be used. Liquid dispersions that are used in chemical toner processes or as a liquid toner are usually dispersed using bead mills. The dispersion quality of the toner ingredients has significant impact on charging properties, color strength, transparency etc. This presentation will discuss some selected examples relating to the dispersion quality of pigments and CCAs and the resulting effects on toner performance.