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US 9,753,387 B2Granted
Toner, developer and developer containing unit
AssigneeRicoh Company, Ltd.
InventorsShin Hasegawa, Tsuyoshi Sugimoto, Hideyuki Santo, Koh Ohnuma, Kohsuke Nagata, Suzuka Karato
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Abstract
A toner includes a base particle including a polyester resin and a colorant. A sea-island structure is observed by a transmission electron microscope (TEM) in a cross-sectional image of the toner. The island structure includes the colorant and has an average diameter of from 0.2 μm to 1.0 μm, and the number of the island structure is from 5 to 30.
Claims10
A toner, comprising:
- a base particle, comprising:
- a polyester resin;
- and
- a colorant,
- wherein a sea-island structure is observed by a transmission electron microscope (TEM) in a cross-sectional image of the toner, and wherein the island structure comprises the colorant and has an average diameter of from 0.2 μm to 1.0 μm, and the number of the island structure is from 5 to 30.
2 more elements
Dependencies are inferred from the claim text.