Patent ID: 9274496
Filing Date: 2016-03-01
CPC Classification: G03G

Claim Text:
1. An electrophotographic 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 the surface of the surface layer has a protrusion derived from the resin particle; wherein: the electrophotographic photosensitive member comprises a surface layer of the electrophotographic photosensitive member contains the following resin (1), resin (2), and compound (3): resin (1): at least one resin selected from the group consisting of polycarbonate resins having no siloxane structure at a terminal and polyester resins having no siloxane structure at a terminal; resin (2): 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; compound (3): 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; and wherein: the resin particle has a porosity of 5% by volume or more in a region in the resin particle, the region being farthest away from the electro-conductive substrate, and assuming that the resin particle is solid particle, the region corresponding to 11% by volume of the solid particle.