TONER
To provide a toner that exhibits excellent transfer properties and has satisfactory dot reproducibility.SOLUTION: A toner has toner particles and silica fine particles A. The toner particles contain a binder resin, and the silica fine particles A are present attached or adhered to the surface of eac...
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Format: | Patent |
Sprache: | eng ; jpn |
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Zusammenfassung: | To provide a toner that exhibits excellent transfer properties and has satisfactory dot reproducibility.SOLUTION: A toner has toner particles and silica fine particles A. The toner particles contain a binder resin, and the silica fine particles A are present attached or adhered to the surface of each of the toner particles. The silica fine particles A contain iron atoms at a concentration of 20 ppm or more and 2000 ppm or less. Primary particles of the silica fine particles A have a number average particle diameter of 80 nm or more and 200 nm or less. The coverage of each of the toner particles by the silica fine particles A is 31.0% or more and 70.0% or less.SELECTED DRAWING: None
【課題】優れた転写性を示し、ドット再現性が良好なトナーを提供する。【解決手段】トナー粒子と、シリカ微粒子Aとを有するトナーであって、前記トナー粒子は結着樹脂を含有し、前記シリカ微粒子Aは前記トナー粒子の表面に付着または固着して存在し、前記シリカ微粒子Aは、鉄原子を20ppm以上2000ppm以下の濃度で含有し、前記シリカ微粒子Aの一次粒子は、80nm以上200nm以下の個数平均粒径を有し、前記トナー粒子の前記シリカ微粒子Aによる被覆率は、31.0%以上70.0%以下であることを特徴とするトナー。【選択図】なし |
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