ELECTROCONDUCTIVE MEMBER AND METHOD FOR MANUFACTURING SAME, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE FORMATION DEVICE

WIPO Patent Application WO/2019/203238

A1

The electroconductive layer of an electroconductive member for electrophotography has a matrix-domain structure, the matrix having a first rubber, the domain having a second rubber and electroconductive particles, the ratio σ/μ of the standard deviation σ of the proportion of the cross-sectional area of the electroconductive particles in each of the domains in relation to the cross-sectional area of each of the domains appearing in a cross section in the thickness direction of the electroconductive layer, to the average value μ of the proportion, being 0-0.4 (inclusive), and at least eight samples, from among first cube-shaped samples in which μ is 20-40% and one side sampled from nine arbitrary locations of the electroconductive layer is 9 μm, satisfying the following condition: where one sample is divided into 27 unit cubes having sides of 3 μm, the volume Vd of the domain included in each unit cube being 2.7-10.8 μm3, and the number of unit cubes is at least 20.

HINO TETSUO (JP)
FUSHIMOTO YASUHIRO (JP)
MURANAKA NORIFUMI (JP)
KYOGAKU MASAFUMI (JP)
YAMADA MASAKI (JP)
INOUE HIROSHI (JP)
FURUKAWA TAKUMI (JP)
WATANABE HIROAKI (JP)
TERADA KENYA (JP)
TOMOMIZU YUYA (JP)
NAKAZAWA TOSHIMITSU (JP)

PCT/JP2019/016347

October 24, 2019

April 16, 2019

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CANON KK (JP)

G03G15/02; B29C48/154; F16C13/00; G03G15/08; G03G15/16

JP2017072833A	2017-04-13
JP2002003651A	2002-01-09
JP2013020175A	2013-01-31
US20140219679A1	2014-08-07

OKABE Yuzuru et al. (JP)

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