Patent ID: 7713675

Claim:
A method of manufacturing a toner, comprising granulating by applying a shearing force and a collision force to a kneaded product of toner raw material containing binder resin and a colorant in water under heat at a temperature in the range of from 5000 to 15000 and pressure in the range of from 0.13 MPa to 0.3 MPa and in the presence of a water-soluble polymeric dispersant with preventing the generation of bubbles, wherein the shearing force and the collision force are applied to the kneaded product of toner raw material containing the binder resin and the colorant by use of a granulator comprising: a cylindrical pressure-resistant container having an internal space, which can be hermetically closed; a spinning rotor which is provided in the internal space of the cylindrical pressure-resistant container and supported on one face or both faces in a thickness direction of the pressure-resistant container so as to be rotatable, having a shaft center in common with the pressure-resistant container and containing stirring blades which initiate flow of the kneaded product of toner and raw material in the radial direction; a following screen having a shape of tube, which has a shaft center in common with the cylindrical pressure-resistant container and is provided around the spinning rotor so as to be rotatable with rotation of the spinning rotor, and of which peripheral wall is provided with a plurality of slits for flowing a liquid; and a fixed screen having a shape of tube, which has a shaft center in common with the cylindrical pressure-resistant container and is provided around the following screen, and of which peripheral wall is provided with a plurality of slits for flowing a liquid.