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Title:
TONER FOR ELECTROSTATIC CHARGE IMAGE DEVELOPMENT AND METHOD OF MANUFACTURING THE SAME, CARTRIDGE, IMAGE FORMING METHOD, AND IMAGE FORMING APPARATUS
Document Type and Number:
Japanese Patent JP2012203368
Kind Code:
A
Abstract:

To provide toner for electrostatic charge image development that is excellent in image density stability over time.

Toner for electrostatic charge image development has colored particles containing colorant and a binder resin, two or more types of inorganic particles are externally added to the surface of the colored particles, the two or more types of inorganic particles include titanium-based particles and silica-based particles, the exposure rate of the surface of the colored particles is 25% or less, and the ratio of the titanium-based particles in contact with the colored particles relative to the toner is 15% or less. A method of manufacturing the toner for the electrostatic charge image development includes: a step for preparing colored particles containing colorant and a binder resin; a silica-based particle adhesion step for adding silica-based particles to the colored particles through wet external addition in an aqueous medium and obtaining silica-based-particle-adhered colored particles; and a titanium-based particle adhesion step for adding titanium-based particles through dry external addition.


Inventors:
HAMANO KOICHI
TAGUCHI TETSUYA
FUJITA ASASHI
KAMATA HIROSHI
TAKAGI MASAHIRO
Application Number:
JP2011070899A
Publication Date:
October 22, 2012
Filing Date:
March 28, 2011
Export Citation:
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Assignee:
FUJI XEROX CO LTD
International Classes:
G03G9/08; G03G9/087; G03G15/08
Domestic Patent References:
JP2006276060A2006-10-12
JP2007322939A2007-12-13
JP2008292675A2008-12-04
JP2005266557A2005-09-29
JP2005115029A2005-04-28
JP2005300624A2005-10-27
Attorney, Agent or Firm:
Yasuhiro Noguchi