KNEADING EXTRUDER WITH FLAT NOZZLE

摘要

PURPOSE: To provide a kneading extruder for manufacturing electrostatic latent image developing toner uniformly dispersed with not only in dye pigment and charge control agent but also wax in binder resin. CONSTITUTION: In a continuously kneading extruder for manufacturing electrostatic image developing toner made at least of binder resin and wax, the sectional shape of the nozzle 1 of the extruder is flat and the relationship between the opening sectional area Sp of the nozzle and the space sectional area Ss in the cylinder of the extruder is Sp/Ss>0.3.