Title:
A magnetic career and a 2 ingredient system development agent
Document Type and Number:
Japanese Patent JP6222994
Kind Code:
B2
Abstract:
The present invention provides a magnetic carrier that can stably impart charge to a toner on a long term basis and that exhibits an excellent toner separation property and thus exhibits an excellent developing performance. This magnetic carrier is a magnetic carrier in which a vinyl resin coats the surface of a resin-filled core in which a resin is filled in pores of a porous ferrite particle, wherein the resistivity, Mg content, and total content of Sr and Ca oxides of the porous ferrite particle exhibit prescribed values and the magnetic carrier has a total area—in the backscattered electron projection image obtained by observation using a scanning electron microscope at an acceleration voltage of 2.0 kV—for a region originating with the porous ferrite particle of from at least 0.2 area % to not more than 5.0 area % with reference to the projected area of the magnetic carrier.
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Inventors:
Tsune Ishigami
Nozomi Komatsu
Kentaro Kamae
Baba Yoshinobu
Nozomi Komatsu
Kentaro Kamae
Baba Yoshinobu
Application Number:
JP2013112077A
Publication Date:
November 01, 2017
Filing Date:
May 28, 2013
Export Citation:
Assignee:
Canon Inc
International Classes:
G03G9/107; G03G9/08; G03G9/113
Domestic Patent References:
| JP2009205149A | ||||
| JP2011158833A | ||||
| JP2011158742A | ||||
| JP2011158816A | ||||
| JP2011164225A | ||||
| JP10198068A | ||||
| JP2014006510A |
Foreign References:
| WO2010016602A1 |
Attorney, Agent or Firm:
Kazunobu Sera
Yoshiyuki Kawaguchi
Mayuko Wakuda
Koichiro Sakai
Takeshi Nakamura
Takeshi Niwa
Yoshiyuki Kawaguchi
Mayuko Wakuda
Koichiro Sakai
Takeshi Nakamura
Takeshi Niwa