Title:
METHOD FOR PRODUCING CARRIER CORE MATERIAL FOR ELECTROPHOTOGRAPHIC DEVELOPER, CARRIER CORE MATERIAL FOR ELECTROPHOTOGRAPHIC DEVELOPER, CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPER, AND ELECTROPHOTOGRAPHIC DEVELOPER
Document Type and Number:
WIPO Patent Application WO/2014/033875
Kind Code:
A9
Abstract:
This method for producing a carrier core material for an electrophotographic developer containing iron, manganese and calcium as a core composition is provided with: a mixing step (A) in which a raw material containing iron, a raw material containing manganese and a raw material containing calcium are mixed; a granulation step (C) in which, after the mixing step, the mixture that was mixed is granulated; and a sintering step (D) in which a magnetic phase is formed by sintering the powder-like material produced in the granulation step at a prescribed temperature. The raw material containing calcium is granular, and the volume-average particle diameter of the primary particles thereof is not more than 1 μm.
Inventors:
KAWAUCHI TAKESHI (JP)
IIDA TOMOHIDE (JP)
IIDA TOMOHIDE (JP)
Application Number:
PCT/JP2012/072023
Publication Date:
February 05, 2015
Filing Date:
August 30, 2012
Export Citation:
Assignee:
DOWA ELECTRONICS MATERIALS CO (JP)
DOWA IP CREATION CO LTD (JP)
KAWAUCHI TAKESHI (JP)
IIDA TOMOHIDE (JP)
DOWA IP CREATION CO LTD (JP)
KAWAUCHI TAKESHI (JP)
IIDA TOMOHIDE (JP)
International Classes:
G03G9/113; G03G9/107
Attorney, Agent or Firm:
ITOH, Hidehiko et al. (JP)
Hidehiko Ito (JP)
Hidehiko Ito (JP)
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