TONER FOR ELECTROSTATIC CHARGE IMAGE DEVELOPMENT, ELECTROSTATIC CHARGE IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS

To provide a toner for electrostatic charge image development that achieves both transferability and fixability.SOLUTION: A toner for electrostatic charge image development has toner particles having an average circularity Cc of 0.80 or more and less than 0.98, and an external additive including mon...

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Bibliographic Details
Main Authors FUNABA KOJI, ISHIHARA YUKA, IKEDA MASAFUMI
Format Patent
LanguageEnglish
Japanese
Published 05.04.2023
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:To provide a toner for electrostatic charge image development that achieves both transferability and fixability.SOLUTION: A toner for electrostatic charge image development has toner particles having an average circularity Cc of 0.80 or more and less than 0.98, and an external additive including monodisperse silica particles and titanic acid compound particles. When the coverage of the monodisperse silica particles at projections of the surface of the toner particle is defined as A%, and the coverage of the monodisperse silica particles at recesses of the surface of the toner particle as B%, the value of the ratio A/B is 1.05 or more.SELECTED DRAWING: None 【課題】転写性と定着性とが両立される静電荷像現像用トナーの提供。【解決手段】平均円形度Ｃｃが０．８０以上０．９８未満であるトナー粒子と、単分散シリカ粒子及びチタン酸化合物粒子を含む外添剤と、を有し、前記トナー粒子表面の凸部における前記単分散シリカ粒子の被覆率をＡ％とし、前記トナー粒子表面の凹部における前記単分散シリカ粒子の被覆率をＢ％としたとき、比Ａ／Ｂの値が１．０５以上である、静電荷像現像用トナー。【選択図】なし
Bibliography:Application Number: JP20210156193