Electro-conductive member for electrophotography, process cartridge for electrophotography, and electrophotographic image forming apparatus
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United States of America Patent
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May 31, 2022
Grant Date -
Oct 1, 2020
app pub date -
Mar 20, 2020
filing date -
Mar 29, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
The electro-conductive member has an electro-conductive support, and an electro-conductive layer in this order, the electro-conductive layer including a matrix and domains, the matrix constituted by a first rubber composition containing a cross-linked product of a first rubber, the domains having electro-conductivity, and dispersed in the matrix, each of the domains constituted by a second rubber composition containing a cross-linked product of a second rubber and an electro-conductive particle, the first rubber and the second rubber being diene-based rubbers, the first rubber having at least one monomer unit, the second rubber having at least one monomer unit different from the monomer unit which the first rubber has; a difference of absolute values of SP values between the first rubber and the second rubber is 0.2 (J/cm3)0.5 to 4.0 (J/cm3)0.5; and a tan δ1/tan δ2 is 0.45 to 2.00.
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