Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus

A process cartridge attachable to and detachable from a main body of an electrophotographic apparatus, comprising:

• an electrophotographic photosensitive member, and
• at least one unit selected from the group consisting of a charging unit, a developing unit, a transfer unit, and a cleaning unit, the process cartridge integrally supporting the electrophotographic photosensitive member and the at least one unit,
• wherein the electrophotographic photosensitive member comprises:
• a support;
• an undercoat layer;
• a photosensitive layer;
• and
• a surface layer, and wherein
• the undercoat layer contains a binder resin and strontium titanate particles, and
• the surface layer is a cured film of a composition containing at least one compound selected from a guanamine compound and a melamine compound, and a charge transport material having at least one substituent selected from —OH, —OCH3, —NH2, —SH, and —COOH.

An electrophotographic apparatus, comprising:

• an electrophotographic photosensitive member,
• a charging unit;
• an exposure unit;
• a developing unit;
• and
• a transfer unit, wherein
• the electrophotographic photosensitive member comprises:
• a support;
• an undercoat layer;
• a photosensitive layer;
• and
• a surface layer, and wherein
• the undercoat layer contains a binder resin and strontium titanate particles, and
• the surface layer is a cured film of a composition containing at least one compound selected from a guanamine compound and a melamine compound, and a charge transport material having at least one substituent selected from —OH, —OCH3, —NH2, —SH, and —COOH.