Toner, two-component developer, and image forming method
AssigneeRicoh Company, Ltd.
InventorHideki SUGIURA
Life of this patent
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Abstract
A toner including a mother particle and an external additive is provided. The mother particle includes a core including a crystalline polyester, an amorphous polyester, a colorant, and a release agent; and a shell including resin particles. A deformation amount H1 of the toner compressed by a pressure of 0.5 mN under a temperature of 25° C. is between 0.2 and 1.5 μm. A difference D between the deformation amount H1 and a deformation amount H2 of the toner compressed by a pressure of 0.5 mN under a temperature of 50° C. is between 0.0 and 1.0 μm. A surface roughness Ra of the toner melted at 90° C. is between 0.02 and 0.40 μm.
Claims8
A toner, comprising:
- a mother particle including:
- a core including a crystalline polyester, an amorphous polyester, a colorant, and a release agent;
- and
- a shell including resin particles;
- and
- an external additive,
- wherein a deformation amount H1 of the toner compressed by a pressure of 0.5 mN under a temperature of 25° C. is between 0.2 and 1.5 μm,
- wherein a difference D between the deformation amount H1 and a deformation amount H2 of the toner compressed by a pressure of 0.5 mN under a temperature of 50° C. is between 0.0 and 1.0 μm, and
- wherein a surface roughness Ra of the toner melted at 90° C. is between 0.02 and 0.40 μm.
Dependencies are inferred from the claim text.