Electroconductive member for electrophotography, process cartridge, and electrophotographic image-forming apparatus
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United States of America Patent
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Feb 20, 2018
Grant Date -
Jun 2, 2016
app pub date -
Nov 17, 2015
filing date -
Nov 28, 2014
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Abstract
Provided is an electroconductive member for electrophotography having a stable charging ability. The electroconductive member includes, in this order, an electroconductive substrate, an electroconductive elastic layer, and a surface layer. The surface layer contains a polymer having a urethane linkage. The polymer has, in the molecule, structures included in at least two groups selected from: Group A of structures each represented by a specific structural formula (1); Group B of at least one of structures each represented by a specific structural formula (2) or structures each represented by a structural formula (3); and Group C of structures each represented by a specific structural formula (4). The surface layer has a volume resistivity of 1.0×1010 Ω·cm or more and 1.0×1016 Ω·cm or less, and the surface layer has a universal hardness at a depth 1 μm from the surface thereof of 1.0 N/mm2 or more and 7.0 N/mm2 or less.
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