ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER
To provide an electrostatic charge image developing toner which suppresses fogging in a low-temperature, low-humidity environment.SOLUTION: An electrostatic charge image developing toner is provided, comprising toner base particles containing a binder resin and colorant, and an external additive con...
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| Format: | Patent |
| Sprache: | eng ; jpn |
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| Zusammenfassung: | To provide an electrostatic charge image developing toner which suppresses fogging in a low-temperature, low-humidity environment.SOLUTION: An electrostatic charge image developing toner is provided, comprising toner base particles containing a binder resin and colorant, and an external additive containing silica particles A charged with a polarity opposite that of the toner base particles, the silica particles A having a shape index of 2.0 or greater as expressed as a ratio of a number average particle diameter to a BET equivalent particle diameter.SELECTED DRAWING: None
【課題】低温低湿下でのカブリが抑制される、静電荷像現像用トナーに関すること。【解決手段】結着樹脂及び着色剤を含有するトナー母粒子と外添剤とを含有する静電荷像現像用トナーであって、前記外添剤が、帯電極性が前記トナー母粒子に対して逆極性であり、個数平均粒径のＢＥＴ換算粒径に対する比で表される形状指数が2.0以上であるシリカ粒子Ａを含有する、静電荷像現像用トナー。【選択図】なし |
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