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Title:
METHOD FOR PRODUCING CARRIER CORE FOR ELECTROPHOTOGRAPHIC DEVELOPER, CARRIER CORE FOR ELECTROPHOTOGRAPHIC DEVELOPER, CARRIER FOR ELECTROPHOTOGRAPHIC CARRIER, AND ELECTROPHOTOGRAPHIC DEVELOPER
Document Type and Number:
WIPO Patent Application WO/2012/132759
Kind Code:
A1
Abstract:
A method for producing a carrier core for an electrophotographic developer comprises a step (A) for producing a slurry in which a slurry is produced from a starting material containing iron and a starting material containing strontium, a step (B) for granulation in which, after the step for producing a slurry, the resulting mixture is granulated, and a step (C) for baking in which the granulated powder from the granulation step is baked at a predetermined temperature to form a magnetic phase. In the step for producing a slurry, a slurry is produced from a starting material containing iron such that the volume grain diameter D50 of the starting material containing iron is 1.0 to 4.0 µm and the volume grain diameter D90 of the starting material containing iron is 2.5 to 7.0 µm, and a slurry is produced from a starting material containing strontium so that when the strontium content of the carrier core for an electrophotographic developer is y, 0 < y < 5,000 ppm is satisfied.

Inventors:
KAWAUCHI TAKESHI (JP)
IIDA TOMOHIDE (JP)
Application Number:
JP2012/055345
Publication Date:
October 04, 2012
Filing Date:
March 02, 2012
Export Citation:
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Assignee:
DOWA ELECTRONICS MATERIALS CO (JP)
DOWA IP CREATION CO LTD (JP)
KAWAUCHI TAKESHI (JP)
IIDA TOMOHIDE (JP)
International Classes:
G03G9/107; G03G9/113
Foreign References:
JP2010243798A2010-10-28
JP2007271662A2007-10-18
JP2007271663A2007-10-18
JP2006337828A2006-12-14
JP2011008199A2011-01-13
Other References:
See also references of EP 2610674A4
Attorney, Agent or Firm:
ITOH, Hidehiko et al. (JP)
Hidehiko Ito (JP)
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Claims: