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US 12,607,948 B2Granted
Toner, toner production method, toner storage unit, image forming apparatus, and image forming method
AssigneeRicoh Company, Ltd.
InventorsMasahiro Yukikawa, Akio Takei, Akinori Saito, Hideto Suzuki
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Abstract
A toner includes toner matrix particles containing resin and wax; and an external additive, wherein an average number of voids per toner is 5 or more and 10 or less per toner with a void diameter Φ (nm) of voids in the toner matrix particles being 500≥Φ≥200, as measured based on cross-sectional observation by a scanning electron microscope (SEM).
Claims9
A toner, comprising:
- toner matrix particles containing resin and wax;
- and
- an external additive;
- wherein voids are formed inside the toner matrix particles;
- and
- wherein an average number of voids per toner is 5 or more and 10 or less per toner, with a void diameter Φ (nm) of voids in the toner matrix particles being 500≥Φ≥200, as measured based on cross-sectional observation by a scanning electron microscope (SEM).
3 more elements
A toner production method, comprising:
- obtaining toner matrix particles by an emulsion aggregation method or a dissolution suspension method;
- wherein voids are formed inside the toner matrix particles;
- and
- wherein an average number of voids per toner is 5 or more and 10 or less per toner, with a void diameter Φ (nm) of voids in the toner matrix particles being 500≥Φ≥200, as measured based on cross-sectional observation by a scanning electron microscope (SEM).
1 more element
Dependencies are inferred from the claim text.