Electrostatic-latent-image-developing toner, electrostatic latent image developer, process for producing electrostatic-latent-image-developing toner, image-forming method, and image-forming apparatus
AssigneeFuji Xerox Co., Ltd.
InventorsHitomi AKIYAMA, Junichi TOMONAGA, Yasunobu KASHIMA
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Abstract
An electrostatic-image-developing toner includes toner particles containing a binder resin, a colorant, and a release agent, wherein the toner contains colorless binder resin particles and, of the colorless binder resin particles, particles having a volume-average particle size diameter 1.5 times as large as, or larger than that of, D50 of the toner particles are in a proportion of about 30 particles or less particles per 5,000 toner particles, with D50 being a volume-average particle size diameter of the toner particles.
Claims6
An electrostatic-image-developing toner comprising:
- toner particles containing a binder resin, a colorant, and a release agent,
- wherein
- the toner contains colorless binder resin particles and, of the colorless binder resin particles, particles having a volume-average particle size diameter 1.5 times as large as, or larger than that of, D50 of the toner particles are in a proportion of about 30 particles or less particles per 5,000 toner particles, with D50 being a volume-average particle size diameter of the toner particles.
A process for producing an electrostatic-image-developing toner, the process comprising:
- emulsifying an oil phase containing a polymerizable monomer for preparing a binder resin in an aqueous phase under stirring to thereby prepare an emulsion containing the polymerizable monomer;
- polymerizing the polymerizable monomer by stirring at high speed upon adding a polymerization initiator to the aqueous phase to which the emulsion containing the polymerizable monomer has been added to thereby prepare binder resin particles;
- mixing a dispersion of binder resin particles wherein the thus-obtained binder resin particles of about 1 μm or less in particle size are dispersed, a colorant dispersion wherein a colorant is dispersed, and a release agent dispersion wherein a release agent is dispersed, to aggregate into particles of a toner particle size containing the binder resin and the colorant;
- and
- fusing by heating the thus-obtained aggregated particles to a temperature equal to or higher than the glass transition temperature of the binder resin particles to thereby form toner particles.
Dependencies are inferred from the claim text.