公开(公告)号：EP3617804A1

公开(公告)日：2020-03-04

申请号：EP19193710.1

申请日：2019-08-27

申请人： CANON KABUSHIKI KAISHA

发明人： MIYAMOTO, Akinori ,  MORI, Kota ,  HANO, Masami ,  KASE, Takashi ,  FUKUDA, Tadashi ,  AKASAKI, Mikihiro ,  OHTSU, Takeshi

IPC分类号： G03G15/02 ,  G03G9/097

摘要： Provided is an image forming apparatus in which occurrence of an image failure in association with contamination caused by an external additive, such as silica, adhering to a charging unit is suppressed. The image forming apparatus is configured to charge an image bearing member through use of the charging unit, and uses toner having, on a surface thereof, strontium titanate particles and silica particles having predetermined physical properties.

公开(公告)号：EP3617802A1

公开(公告)日：2020-03-04

申请号：EP19193600.4

申请日：2019-08-26

申请人： CANON KABUSHIKI KAISHA

发明人： OHTSU, Takeshi ,  FUKUDA, Tadashi ,  AKASAKI, Mikihiro ,  MIYAMOTO, Akinori ,  MORI, Kota ,  HANO, Masami ,  KASE, Takashi ,  TSUJIMOTO, Daisuke ,  MATSUO, Ryuichiro ,  HOSOI, Kazuto ,  OGAWA, Yoshihiro

IPC分类号： G03G9/097 ,  G03G9/08

摘要： A toner includes toner particle containing at least a strontium titanate particle on the surface of the toner particle, and the toner is a water-washed toner from which strontium titanate particle desorbable by water washing are removed by water washing. The water-washed toner contains the strontium titanate particle having a number average particle diameter of primary particle (D1) of 10 nm or more and 150 nm or less, and when the distribution of an Sr element in the water-washed toner in the depth direction is determined, (i) the Sr element abundance on the outermost surface x satisfying 0.00