Process cartridge and electrophotographic apparatus

摘要

A process cartridge that can suppress production of a banding image attributed to contact rotation of an electrophotographic photosensitive member and a charging member and output a high-quality image is provided. The charging member includes an electro-conductive substrate and an electroconductive resin layer, the resin layer contains a binder, a conductive fine particle, and a bowl-shaped resin particle having an opening, and the surface of the charging member has a concavity derived from the opening of the bowl-shaped resin particle and a protrusion derived from the edge of the opening thereof. The electrophotographic photosensitive member includes a support and a photosensitive layer, and the surface layer in the photosensitive member contains a specific resin (α), a specific resin (β), and a specific compound (γ).

主权项

1. A process cartridge comprising:
a charging member; and an electrophotographic photosensitive member which is electrically charged upon being brought into contact with the charging member, wherein: the charging member comprises
an electro-conductive substrate andan electroconductive resin layer formed on the electro-conductive substrate; the electroconductive resin layer comprises
a binder,a conductive fine particle, anda bowl-shaped resin particle which has an opening; and the surface of the charging member has
a concavity derived from the opening of the bowl-shaped resin particle, anda protrusion derived from an edge of the opening of the bowl-shaped resin particle;and wherein:the electrophotographic photosensitive member comprisesa support and a photosensitive layer formed on the support, and a surface layer of the electrophotographic photosensitive member comprises the following resin (α), resin (β), and compound (γ): resin (α): polycarbonate resins having no siloxane structure at a terminal; resin (β): at least one resin selected from the group consisting of polycarbonate resins having a siloxane structure at a terminal, polyester resins having a siloxane structure at a terminal, and acrylic resins having a siloxane structure at a terminal; and compound (γ): at least one compound selected from the group consisting of methyl benzoate, ethyl benzoate, benzyl acetate, ethyl 3-ethoxypropionate, and diethylene glycol ethyl methyl ether, wherein the resin (α) is a polycarbonate resin A having a repeating structural unit represented by the following formula (A): wherein R21 to R24 each independently represent a hydrogen atom or a methyl group; X1 represents a single bond, a cyclohexylidene group, or a divalent group having a structure represented by the following formula (C): wherein R41 and R42 each independently represent a hydrogen atom, a methyl group, or a phenyl group.