Title:
画像形成用キャリア、画像形成用現像剤、画像形成装置、画像形成方法およびプロセスカートリッジ
Document Type and Number:
Japanese Patent JP6932916
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a carrier for image formation that can provide stable image quality over a long period of use.SOLUTION: There is provided a carrier including at least a core material particle formed of a magnetic material and a coating layer on a surface of the core material particle, where the coating layer contains at least a resin, carbon black, and two types of inorganic fine particles A and B; the inorganic fine particle A and carbon black have a concentration gradient in the thickness direction; the concentration of the inorganic fine particle A increases and the concentration of the carbon black decreases toward a surface layer of the coating layer; the volume ratio of the carbon black is 0% or more and 30% or less in a depth range of 0.0 to 0.1 μm from the surface of the coating layer; and the inorganic fine particle A is a conductive fine particle having a powder specific resistance of 200 Ω cm or less.SELECTED DRAWING: Figure 1
Inventors:
Masashi Nagayama
Takii Mariko
Yoshihiro Murasawa
Haruki Murata
Niwayama Katsura
Toru Suganuma
Koichi Sakata
Saori Yamada
Shinya Nakagawa
Miyazaki Kosuke
Takii Mariko
Yoshihiro Murasawa
Haruki Murata
Niwayama Katsura
Toru Suganuma
Koichi Sakata
Saori Yamada
Shinya Nakagawa
Miyazaki Kosuke
Application Number:
JP2016229173A
Publication Date:
September 08, 2021
Filing Date:
November 25, 2016
Export Citation:
Assignee:
株式会社リコー
International Classes:
G03G9/113; G03G9/08; G03G15/08
Domestic Patent References:
| JP8179570A | ||||
| JP1191155A | ||||
| JP2010072114A | ||||
| JP2014048455A | ||||
| JP2008008938A | ||||
| JP2008216561A | ||||
| JP8286429A | ||||
| JP7261465A | ||||
| JP2009063805A | ||||
| JP2014115463A | ||||
| JP2011145397A | ||||
| JP2006039357A | ||||
| JP2008262155A | ||||
| JP2009069471A | ||||
| JP2002287432A | ||||
| JP2018206810A | ||||
| JP2003176339A | ||||
| JP2014056108A |
Attorney, Agent or Firm:
Chieko Tateno