METHOD OF MINIMIZING KOGATION IN THERMAL INKJET PRINTHEADS

摘要

A method of minimizing kogation of a heater element in a thermal inkjet printhead. The method comprises the steps of: (i) supplying an inkjet ink to a nozzle chamber of the printhead; and (ii) repeatedly actuating a heater element in the nozzle chamber so as to heat a portion of the ink to a temperature sufficient to form a bubble therein, thereby causing droplets of ink to be ejected from a nozzle opening associated with the nozzle chamber. The ink comprises an acrylic polymer having a glass transition temperature (Tg) of less than about 100 °C, which minimizes kogation of the heater element.