Canon Kabushiki Kaisha

Noriyuki Takagi

Kazushige Nakamura

Michiyo Sekiya

Akio Maruyama

Hideaki Nagasaka

Noboru Kashimura

Shuji Ishii

Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus

The present invention provides an electrophotographic photosensitive member wherein a maximum height (RmaxD) of a surface roughness of a support portion is 1.2 &mgr;m RmaxD&lE;5.0 &mgr;m, an average roughness (Rz) of 10 points is 1.2 &mgr;m&lE;Rz&lE;3.0 m, an arithmetic average roughness (Ra) is 0.15 &mgr;m&lE;Ra&lE;0.5 &mgr;m, and an irregularity average interval (Sm) is 30 &mgr;m&lE;Sm&lE;80 &mgr;m. The photosensitive member's charge generation layer contains a phthalocyanine compound, its charge transport layer has a thickness which is at least 9 &mgr;m but not larger than 18 &mgr;m, the electrophotographic photosensitive member in every 1 cm area has an electrostatic capacity (C) of 130 pF or more. This invention also provides a process cartridge and an electrophotographic apparatus containing the electrophotographic photosensitive member.

Electrophotographic photosensitive member, electrophotographic apparatus and process cartridge

An electrophotographic photosensitive member is formed by disposing a photosensitive layer and a protective layer in this order on a support. The protective layer comprises an applied and cured product of the following solution (A) or (B); (A) a solution comprising a curable resin component and a polymerization initiator having a polymeric recurring structure, or (B) a solution comprising a curable resin component, a polymerization initiator free from a polymeric recurring structure and a polymerization initiator aid having a polymeric recurring structure. Because of the polymerization initiator or polymerization initiator aid having a polymeric recurring structure used for constituting the protective layer, the resultant photosensitive member can exhibit improved durability as well as good electrophotographic performances.

Electrophotographic photosensitive member, process cartridge, and

The present invention relates to an electrophotographic photosensitive member, a process cartridge and an electrophotographic apparatus. The electrophotographic photosensitive member includes a support, a photosensitive layer provided on the support, and a surface layer provided on the photosensitive layer. The surface layer includes tantalum-doped tin oxide particles and a resin.

Electrophotographic photosensitive member, and process cartridge and

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Shizuoka, Japan

Noriyuki Takagi