Toner and toner producing method, toner storing unit, image forming apparatus, and image forming method
AssigneeRicoh Company, Ltd.
InventorsKazumasa Tabata, Akio Takei, Hiroshi Yamada, Toma Takebayashi, Ryuuta Yoshida
Life of this patent
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Abstract
A toner includes toner base particles each containing a binder resin and a release agent, and resin particles on a surface of each of the toner base particles. A ratio (Iw/Ir) is 0.10 or more and 0.30 or less, where Ir is a peak height of the binder resin and Iw is a peak height of the release agent, as measured through attenuated total reflection (ATR). A standard deviation σ (nm) of distances L (nm) between the resin particles that are adjacent to each other on the surface of each of the toner base particles is 150 nm or more and 500 nm or less.
Claims20
A toner, comprising:
- toner base particles each containing a binder resin and a release agent;
- and
- resin particles on a surface of each of the toner base particles,
- wherein:
- a ratio (Iw/Ir) is 0.10 or more and 0.30 or less, where Ir is a peak height of the binder resin and Iw is a peak height of the release agent, as measured through attenuated total reflection (ATR),
- a standard deviation σ (nm) of distances L (nm) between the resin particles that are adjacent to each other on the surface of each of the toner base particles is 150 nm or more and 500 nm or less,
- the resin particles each include a resin including a vinyl unit, and
- the resin including the vinyl unit includes methacrylic acid.
Dependencies are inferred from the claim text.