Electrophotographic photoconductor, electrophotographic apparatus and process cartridge

An electrophotographic apparatus comprising:

• an electrophotographic photoconductor;
• a charging unit;
• an exposing unit;
• a developing unit;
• a cleaning unit;
• and
• a transfer unit,
• wherein the electrophotographic photoconductor is an electrophotographic photoconductor comprising:
• an electroconductive substrate;
• an intermediate layer;
• and
• a photoconductive layer,
• the intermediate layer and the photoconductive layer being on the electroconductive substrate,
• wherein the intermediate layer comprises an inorganic pigment and a binder resin,
• wherein a volume ratio of the inorganic pigment in the intermediate layer is 30% by volume to 50% by volume,
• wherein the inorganic pigment comprises titanium oxide and a content of the titanium oxide in the inorganic pigment is 70% by mass to 90% by mass,
• wherein the inorganic pigment has a specific surface area of 70 m2/g to 140 m2/g, and
• wherein the intermediate layer has a volume resistivity at an electrical field intensity of 2.5×105 V/cm of 5×1011Ω·cm to 1×1013Ω·cm.

A process cartridge comprising:

• an electrophotographic photoconductor;
• and
• a charging unit, an exposing unit, a developing unit, a cleaning unit or a transfer unit, or any combination thereof,
• wherein the electrophotographic photoconductor is an electrophotographic photoconductor comprising:
• an electroconductive substrate;
• an intermediate layer;
• and
• a photoconductive layer,
• the intermediate layer and the photoconductive layer being on the electroconductive substrate,
• wherein the intermediate layer comprises an inorganic pigment and a binder resin,
• wherein a volume ratio of the inorganic pigment in the intermediate layer is 30% by volume to 50% by volume,
• wherein the inorganic pigment comprises titanium oxide and a content of the titanium oxide in the inorganic pigment is 70% by mass to 90% by mass,
• wherein the inorganic pigment has a specific surface area of 70 m2/g to 140 m2/g, and
• wherein the intermediate layer has a volume resistivity at an electrical field intensity of 2.5×105V/cm of 5×1011 Ω·cm to 1×1013Ω·cm.