Electrostatic charge image developing toner, method for producing electrostatic charge image developing toner, electrostatic charge image developer, toner cartridge, process cartridge, and image forming apparatus
AssigneeFUJIFILM Business Innovation Corp.
InventorsYukiaki Nakamura, Daisuke Noguchi, Masaru Takahashi, Kazuhiko Nakamura
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Abstract
An electrostatic charge image developing toner includes a toner particle, and the toner particle includes: a core particle containing a large-diameter particle having a number average particle diameter of 1 μm or more; and a shell layer that includes at least two resin layers each containing an amorphous resin and covers a surface of the core particles, and an outermost layer of the at least two resin layers is a resin layer being made of the amorphous resin.
Claims16
An electrostatic charge image developing toner comprising:
- a toner particle including:
- a core particle that contains a light-emitting particle having a number average particle diameter of 1 μm or more;
- and
- a shell layer that covers a surface of the core particle and includes at least three resin layers each containing an amorphous resin,
- wherein the at least three resin layers include:
- an innermost layer consisting of the amorphous resin,
- an outermost layer consisting of the amorphous resin, and
- an intermediate layer that is a layer other than the innermost layer and the outermost layer of the at least three resin layers, and that includes a resin layer containing the amorphous resin, a releasing agent, and a crystalline resin.
A method for producing an electrostatic charge image developing toner, comprising:
- preparing a core particle dispersion liquid in which a core particle containing a large-diameter particle having a number average particle diameter of 1 μm or more is dispersed;
- performing an operation of adding an amorphous resin particle to the core particle dispersion liquid and aggregating the core particle and the amorphous resin particle such that the amorphous resin particle adheres to the core particle, thereby forming a resin particle layer on a surface of the core particle;
- repeating the operation at least one time, wherein only the amorphous resin particle is added as a particle added in the last operation, thereby forming an aggregated particle including at least two resin particle layers on the surface of the core particle, an outermost layer of the at least two resin particle layers consisting of the amorphous resin particle;
- and
- heating an aggregated particle dispersion liquid in which the aggregated particle is dispersed to fuse and coalesce the aggregated particle, thereby forming a toner particle.
Dependencies are inferred from the claim text.