Electrophotographic photoreceptor, image forming apparatus and process cartridge
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United States of America Patent
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Sep 1, 2015
Grant Date -
Sep 19, 2013
app pub date -
Mar 5, 2013
filing date -
Mar 16, 2012
priority date (Note) -
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Abstract
An electrophotographic photoreceptor, including an electroconductive substrate; a photosensitive layer overlying the electroconductive substrate; and a surface layer overlying the photosensitive layer, wherein the surface layer includes a resin having no charge transportability; and an inorganic particulate material, wherein the inorganic particulate material is a zinc oxide doped with a boron group, and wherein the electrophotographic photoreceptor has a surface specific resistivity (R1) not less than 1013 Ω/cm2 when the surface layer has an electric field intensity of 1×104 V/cm, and a ratio (R1/R15) of the surface specific resistivity (R1) to a surface specific resistivity (R15) when the surface layer has an electric field intensity of 1.5×105 V/cm of from 100 to 5,000.
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