Invention Grant
US09256153B2 Charging member, process cartridge and electrophotographic apparatus 有权
充电部件,处理盒和电子照相设备

Charging member, process cartridge and electrophotographic apparatus
Abstract:
Provided a charging member including an electro-conductive substrate and a surface layer. The surface layer includes a binder resin, and a resin particle that roughens the surface layer. A surface of the charging member has a plurality of protrusions each derived from the resin particle. The resin particle has a pore inside thereof, has a porosity Vt of 1.5% by volume or more and 45.0% by volume or less, and has a first and second regions. The first region has a porosity V1, the second region thereof has a porosity V2, and V1 is larger than V2.
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