Electrophotographic photoconductor, process cartridge, and electrophotographic apparatus

Patent metadata

Field	Value
Publication number	US-9360779-B2
Application number	US-201514627989-A
Country	US
Kind code	B2
Filing date	Feb 20, 2015
Priority date	Feb 24, 2014
Publication date	Jun 7, 2016
Grant date	Jun 7, 2016

Abstract

An electrophotographic photoconductor has a support medium, an undercoat layer formed immediately on the support medium, and a photosensitive layer formed immediately on the undercoat layer, in which the undercoat layer contains a binding resin and composite particles each containing a core material particle covered with tin oxide doped with a predetermined amount of aluminum.

First claim

What is claimed is:

1. An electrophotographic photoconductor comprising:
a support medium;
an undercoat layer formed immediately on the support medium; and
a photosensitive layer formed immediately on the undercoat layer
wherein the undercoat layer contains
a binding resin, and
composite particles,
the composite particles each containing
a core material particle and
tin oxide covering the core material particle and doped with aluminum, and
a doping amount of the aluminum based on the tin oxide is 1% by mass or more and 4% by mass or less.

2. The electrophotographic photoconductor according to claim 1 , wherein the core material particle is a titanium oxide particle or a barium sulfate particle.

3. The electrophotographic photoconductor according to claim 1 , wherein a coverage of the tin oxide based on the composite particles is 20% by mass or more and 60% by mass or less.

4. The electrophotographic photoconductor according to claim 1 , wherein the binding resin is a cured resin.

5. The electrophotographic photoconductor according to claim 1 , wherein a powder resistivity of the composite particles is 1×10 6 Ω·cm or more.

6. The electrophotographic photoconductor according to claim 5 , wherein a powder resistivity of the composite particles is 1.5×10 8 Ω·cm or more and 1×10 9 Ω·cm or less.

7. The electrophotographic photoconductor according to claim 1 , wherein a volume resistivity of the undercoat layer is 1×10 9 Ω·cm or more and 1×10 13 Ω·cm or less.

8. The electrophotographic photoconductor according to claim 1 , further comprising a protective layer on the photosensitive layer,
wherein the protective layer contains a polymerized substance of a compound having a chain polymerizable functional group.

9. A process cartridge comprising:
the electrophotographic photoconductor according to claim 1 ; and
at least one device selected from the group consisting of a charging device, a developing device, a transfer device, and a cleaning device, the electrophotographic photoconductor and the at least one device being integrally supported,
wherein the process cartridge is attachable/detachable to/from to an electrophotographic apparatus main body.

10. An electrophotographic apparatus comprising:
the electrophotographic photoconductor according to claim 1 ;
a charging device;
an exposure device;
a developing device; and
a transfer device.

Assignees

• Canon Kk

Inventors

• Ikari Kenichi
• Kitamura Wataru
• Murakami Mai
• Tanaka Daisuke
• Sugiyama Kazumichi
• Murakami Takeshi
• Kawaguchi Daisuke

Classifications

• G03G5/14708

  comprising organic material · CPC title

• G03G5/0542

  Polyvinylalcohol, polyallylalcohol; Derivatives thereof, e.g. polyvinylesters, polyvinylethers, polyvinylamines · CPC title

• G03G5/144

  comprising inorganic material · CPC title

• G03G5/147

  Cover layers · CPC title

• G03G5/0696

  Phthalocyanines · CPC title