Title:
MAGNETIC CORE MATERIAL FOR ELECTROPHOTOGRAPHIC DEVELOPERS, CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPERS, DEVELOPER, METHOD FOR PRODUCING MAGNETIC CORE MATERIAL FOR ELECTROPHOTOGRAPHIC DEVELOPERS, METHOD FOR PRODUCING CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPERS, AND METHOD FOR PRODUCING DEVELOPER
Document Type and Number:
WIPO Patent Application WO/2019/038962
Kind Code:
A1
Abstract:
Provided are: a magnetic core material for electrophotographic developers, which has excellent start-up in the charge amount and is capable of suppressing carrier scattering, thereby enabling stable achievement of good images; a carrier for electrophotographic developers; a developer which contains the carrier; a method for producing a magnetic core material for electrophotographic developers; a method for producing a carrier for electrophotographic developers; and a method for producing a developer. A magnetic core material for electrophotographic developers, in which the content of a sulfur component is 1-45 ppm in terms of sulfate ions.
Inventors:
SAWAMOTO HIROKI (JP)
UEMURA TETSUYA (JP)
UEMURA TETSUYA (JP)
Application Number:
PCT/JP2018/008657
Publication Date:
February 28, 2019
Filing Date:
March 06, 2018
Export Citation:
Assignee:
POWDERTECH CO LTD (JP)
International Classes:
G03G9/107; G03G9/113
Foreign References:
| JP2016025288A | 2016-02-08 | |||
| JP2014197077A | 2014-10-16 | |||
| JP2011008199A | 2011-01-13 | |||
| JPS4834190B1 | 1973-10-19 | |||
| JP2015114560A | 2015-06-22 | |||
| JP2005106999A | 2005-04-21 | |||
| JP2012181398A | 2012-09-20 | |||
| JP2016025288A | 2016-02-08 | |||
| JP2017162630A | 2017-08-25 |
Other References:
See also references of EP 3477395A4
Attorney, Agent or Firm:
KOH-EI PATENT FIRM, P.C. (JP)
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