Title:
MAGNETIC CORE MATERIAL FOR ELECTROPHOTOGRAPHIC DEVELOPER, CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPER, AND DEVELOPER
Document Type and Number:
WIPO Patent Application WO/2018/147001
Kind Code:
A1
Abstract:
Provided are: a magnetic core material for an electrophotographic developer which, despite having a low specific gravity, exhibits excellent electrostatic charge characteristics and strength, and with which excellent images having no defects can be obtained; a carrier for an electrophotographic developer; and a developer including said carrier. This magnetic core material for an electrophotographic developer has a sulfur component content in the range of 60-800 ppm in terms of sulfate ions, and a pore volume in the range of 30-100 mm3/g.
Inventors:
SAWAMOTO HIROKI (JP)
UEMURA TETSUYA (JP)
UEMURA TETSUYA (JP)
Application Number:
PCT/JP2018/000875
Publication Date:
August 16, 2018
Filing Date:
January 15, 2018
Export Citation:
Assignee:
POWDERTECH CO LTD (JP)
International Classes:
G03G9/107; G03G9/113; H01F1/36
Foreign References:
| JP2016224237A | 2016-12-28 | |||
| JP2009234839A | 2009-10-15 | |||
| JP2010055014A | 2010-03-11 | |||
| JP2011180296A | 2011-09-15 | |||
| JPH0959025A | 1997-03-04 | |||
| JP2014197040A | 2014-10-16 | |||
| JP2010055014A | 2010-03-11 | |||
| JP2016025288A | 2016-02-08 | |||
| JP2017023596A | 2017-02-02 |
Other References:
See also references of EP 3582021A4
Attorney, Agent or Firm:
KOH-EI PATENT FIRM, P.C. (JP)
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