Patent ID: 7575843
Filing Date: 2009-08-18
Classification: G03G

Abstract:
1. A method of manufacturing a toner comprising: preparing a coarse toner particle by coarsely pulverizing a melt-kneaded product of toner raw material; adding and dispersing the coarse toner particles in a water to obtain a slurry; passing and pulverizing said slurry through a pressure-resistant nozzle under heat and pressure of 50 to 250 MPa and pulverizing the coarse particles of toner raw material to obtain a heated and pressurized slurry containing toner particles; cooling down the heated and pressurized slurry containing toner particles to obtain a pressurized slurry containing toner particles; and depressurizing the pressurized slurry containing toner particles in a multistage section to a lower pressure level with no generation of bubbles, wherein the toner raw material includes a binder resin, a colorant, a releasing agent, and a charge control agent.