TONER
To provide a toner which is excellent in chargeability and durability in low temperature and low humidity environment, and is also excellent in transferability in long-term use.SOLUTION: A toner has toner particles containing a binder resin, and organosilicon polymer particles on the surface of the...
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Sprache: | eng ; jpn |
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Zusammenfassung: | To provide a toner which is excellent in chargeability and durability in low temperature and low humidity environment, and is also excellent in transferability in long-term use.SOLUTION: A toner has toner particles containing a binder resin, and organosilicon polymer particles on the surface of the toner particles, in which methanol concentration a (vol.%) in a wettability test of the organosilicon polymer particles and methanol concentration b (vol.%) in the wettability test of the toner particles satisfy the following expression (I): |a-b|≤25, and a fixing index of the organosilicon polymer particles to a polycarbonate film calculated by the following expression (II): fixing index=area ratio c of the organosilicon polymer particles migrated to the polycarbonate film/coverage factor d of the organosilicon polymer particles on the surface of the toner particles×100 is 3.5 or less.SELECTED DRAWING: None
【課題】低温低湿環境において、帯電性及び耐久性に優れ、長期使用においても転写性に優れたトナー。【解決手段】結着樹脂を含有するトナー粒子、及び該トナー粒子の表面の有機ケイ素重合体粒子を有するトナーであって、該有機ケイ素重合体粒子の濡れ性試験におけるメタノール濃度a(体積%)、及び該トナー粒子の濡れ性試験におけるメタノール濃度b(体積%)が下記式(I)を満たし、|a−b|≦25 ・・・(I)下記式(II)で計算される、ポリカーボネート膜に対する該有機ケイ素重合体粒子の固着指数が、3.5以下であることを特徴とするトナー。固着指数=該ポリカーボネート膜に移行した該有機ケイ素重合体粒子の面積率c/該トナー粒子表面における該有機ケイ素重合体粒子の被覆率d×100 ・・・(II)【選択図】 なし |
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