MAGNETIC CARRIER AND TWO-COMPONENT DEVELOPER

Title:

MAGNETIC CARRIER AND TWO-COMPONENT DEVELOPER

Document Type and Number:

WIPO Patent Application WO/2010/016604

Kind Code:

A1

Abstract:

A magnetic carrier with which no fogging or carrier adhesion occurs even with long-term use, that has excellent dot reproducibility, and with which high-quality images with no density variation are obtained. Disclosed is a magnetic carrier that has magnetic carrier particles wherein holes in porous magnetic core particles are filled with a resin. The magnetic carrier is characterized in that in a reflection electron image of a cross section of a magnetic carrier particle photographed with a scanning electron microscope, the number of magnetic core part regions having a length of 6.0 µm or more relative to the total number of magnetic core part regions having a length of 0.1 µm or more on 18 lines drawn at 10° intervals through a reference point on the cross section of the magnetic carrier particle is from 5.0 to 35.0% of the number, and the number of regions other than the magnetic core parts having a length of 4.0 µm or more relative to the total number of regions other than the magnetic core parts having a length of 0.1 µm or more is from 1.0 to 15.0% of the number.

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Inventors:

KOMATSU NOZOMU (JP)
ISHIGAMI KOH (JP)
FUJIKAWA HIROYUKI (JP)
NAKAMURA KUNIHIKO (JP)
INOUE CHIKA (JP)
BABA YOSHINOBU (JP)
ITAKURA TAKAYUKI (JP)
ENDO TOMOKO (JP)

Application Number:

PCT/JP2009/064092

Publication Date:

February 11, 2010

Filing Date:

August 04, 2009

Export Citation:

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Assignee:

CANON KK (JP)
KOMATSU NOZOMU (JP)
ISHIGAMI KOH (JP)
FUJIKAWA HIROYUKI (JP)
NAKAMURA KUNIHIKO (JP)
INOUE CHIKA (JP)
BABA YOSHINOBU (JP)
ITAKURA TAKAYUKI (JP)
ENDO TOMOKO (JP)

International Classes:

G03G9/113; G03G9/08

Foreign References:

JP4001606B2	2007-10-31
JPH08160673A	1996-06-21
JPH0850377A	1996-02-20
JP2006337579A	2006-12-14
JP2007057943A	2007-03-08
JP2008200644A	2008-09-04

Other References: