Title:
CARRIER CORE MATERIAL, CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPMENT USING SAME, AND DEVELOPER FOR ELECTROPHOTOGRAPHY USING SAME
Document Type and Number:
WIPO Patent Application WO/2018/173916
Kind Code:
A1
Abstract:
This carrier core material is formed of ferrite particles that contain from 48% by mass to 52% by mass of Fe, from 16% by mass to 22% by mass of Mn, from 1.0% by mass to 3.5% by mass of Mg and from 0.05% by mass to 0.5% by mass of Ca; and this carrier core material is characterized by satisfying formula (1) where RL (Ω·cm) is the electrical resistance at an applied voltage of 500 V in an environment at a temperature of 10°C at a relative humidity of 35% (in an L/L environment) and RH (Ω·cm) is the electrical resistance at an applied voltage of 500 V in an environment at a temperature of 30°C at a relative humidity of 70% (in an H/H environment).
0.1 ≤ (logRL - logRH) ≤ 0.3 (1)
Inventors:
KAWAUCHI TAKESHI (JP)
ISHIKAWA YOHEI (JP)
MIYANO HIROYUKI (JP)
ISHIKAWA YOHEI (JP)
MIYANO HIROYUKI (JP)
Application Number:
PCT/JP2018/010214
Publication Date:
September 27, 2018
Filing Date:
March 15, 2018
Export Citation:
Assignee:
DOWA ELECTRONICS MATERIALS CO (JP)
DOWA IP CREATION CO LTD (JP)
DOWA IP CREATION CO LTD (JP)
International Classes:
G03G9/107; G03G9/113
Domestic Patent References:
| WO2012049900A1 | 2012-04-19 | |||
| WO2011125647A1 | 2011-10-13 | |||
| WO2011125647A1 | 2011-10-13 |
Foreign References:
| JP2017021195A | 2017-01-26 | |||
| JP2015151287A | 2015-08-24 | |||
| JP2008026476A | 2008-02-07 | |||
| JP2012048256A | 2012-03-08 | |||
| JP2016106263A | 2016-06-16 | |||
| JP2005162597A | 2005-06-23 | |||
| JPH09236945A | 1997-09-09 | |||
| JP2013050733A | 2013-03-14 | |||
| JP2014164061A | 2014-09-08 |
Other References:
See also references of EP 3605235A4
Attorney, Agent or Firm:
YAMADA, Shigeki (JP)
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