Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus

Patent metadata

Field	Value
Publication number	US-9256145-B2
Application number	US-201013384852-A
Country	US
Kind code	B2
Filing date	Sep 3, 2010
Priority date	Sep 4, 2009
Publication date	Feb 9, 2016
Grant date	Feb 9, 2016

Abstract

An electrophotographic photosensitive member that can not easily cause charging lines even where it is an electrophotographic photosensitive member employing as a conductive layer a layer containing metal oxide particles is disclosed. Also disclosed are a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member. The electrophotographic photosensitive member has a conductive layer which contains titanium oxide particles coated with tin oxide doped with phosphorus or tungsten.

First claim

The invention claimed is:

1. An electrophotographic photosensitive member comprising:
a support;
a conductive layer formed on the support; and
a photosensitive layer formed on the conductive layer,
wherein the conductive layer contains a binding material, and titanium oxide particles coated with tin oxide doped with tungsten, and
wherein a dielectric loss tan δ of the electrophotographic photosensitive member at a frequency of 1.0×10 3 Hz is from 5×10 −3 or more to 2×10 −2 or less.

2. The electrophotographic photosensitive member according to claim 1 , wherein the conductive layer has a volume resistivity of from 5.0×10 8 Ω·cm or more to 1.0×10 13 Ω·cm or less.

3. A process cartridge which integrally supports the electrophotographic photosensitive member according to claim 1 and at least one means selected from the group consisting of a charging means, a developing means, a transfer means and a cleaning means, and is detachably mountable to the main body of an electrophotographic apparatus.

4. An electrophotographic apparatus which comprises the electrophotographic photosensitive member according to claim 1 , and a charging means, an exposure means, a developing means and a transfer means.

5. The electrophotographic photosensitive member according to claim 1 , wherein the dielectric loss tan δ of from 5×10 −3 or more to 2×10 −2 or less is conducted by the conductive layer.

Assignees

• Fujii Atsushi
• Tsuji Haruyuki
• Matsuoka Hideaki
• Shida Kazuhisa
• Nakamura Nobuhiro
• Canon Kk

Inventors

• Fujii Atsushi
• Tsuji Haruyuki
• Matsuoka Hideaki
• Shida Kazuhisa
• Nakamura Nobuhiro

Classifications

• G03G5/144

  comprising inorganic material · CPC title

• G03G5/08 Primary

  characterised by the photoconductive material being inorganic · CPC title

• G03G5/142

  Inert intermediate layers · CPC title

• G03G5/14

  Inert intermediate or cover layers for charge-receiving layers (for photoconductive, charge-generation or charge-transporting layers G03G5/04) · CPC title

• G03G5/047 Primary

  characterised by the charge-generation layers or charge transport layers {(G03G5/0433 and G03G5/0436 take precedence)} · CPC title