Method and apparatus for producing toner for electrophotography
AssigneeRicoh Company, Ltd.
InventorsJunya Koeda, Kenichi Uehara, Hiroyuki Yoshikawa, Osamu Kouzu
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Abstract
A method of producing a toner composition, including stirring and mixing toner particles comprising a binder resin, a colorant and a release agent with a charge controlling agent in a fluidizing and stirring mixer comprising a rotor having a stirring blade to fix the charge controlling agent on a surface of the toner particles, wherein the stirring and mixing comprises rotating the rotor at a peripheral speed of from 65 to 120 m/s at an environmental temperature (T) in the fluidizing and stirring mixer, satisfying the relationship,Tg-10>T>Tg-35(° C.), where the Tg represents a glass transition temperature of the binder resin.
Claims25
A method of producing a toner composition, comprising:
- stirring and mixing toner particles comprising a binder resin, a colorant and a release agent with a charge controlling agent in a fluidizing and stirring mixer comprising a rotor having a stirring blade to fix the charge controlling agent on a surface of the toner particles,
- wherein the stirring and mixing comprises rotating the rotor at a peripheral speed of from 65 to 120 m/s at an environmental temperature (T) in the fluidizing and stirring mixer, satisfying the following relationship:
- Tg-10>T>Tg-35(° C.)
- where the Tg represents a glass transition temperature of the binder resin.
A fluidizing and stirring mixer comprising:
- a tank configured to contain toner particles and a charge controlling agent;
- and
- a rotor having a stirring blade and operable to fix the charge controlling agent on a surface of the toner particles,
- wherein the rotor is adapted to rotate at a peripheral speed of from 65 to 120 m/s at an environmental temperature (T) in the fluidizing and stirring mixer, satisfying the following relationship:
- Tg-10>T>Tg-35(° C.)
- where the Tg represents a glass transition temperature of a binder resin of the toner particles.
A fluidizing and stirring mixer comprising:
- a tank configured to contain toner particles and a charge controlling agent;
- and
- a rotor having stirring means for stirring the toner particles and charge controlling agent, the rotor being operable to fix the charge controlling agent on a surface of the toner particles,
- wherein the rotor is adapted to rotate at a peripheral speed of from 65 to 120 m/s at an environmental temperature (T) in the fluidizing and stirring mixer, satisfying the following relationship:
- Tg-10>T>Tg-35(° C.)
- where the Tg represents a glass transition temperature of a binder resin of the toner particles.
Dependencies are inferred from the claim text.