US 7,078,139 B2 · Electrophotographic photoreceptor for wet development

Abstract

An electrophotographic photoreceptor for wet development including an electrically conductive substrate, and an organic photosensitive layer formed on the electrically conductive substrate, wherein a surface layer of the organic photosensitive layer includes at least a binder resin comprising a polymer compound and a charge transport material comprising a low molecule compound, the surface layer having an oxygen gas permeation coefficient of 5×10−13 cm3 (STP)*cm/s*cm2*cmHg or less. The electrophotographic photoreceptor has high durability for liquid developer used in a wet development technique and can produce good image characteristics.

Claims24

Dependent claims

An electrophotographic photoreceptor for wet development comprising:

an electrically conductive substrate;
and
an organic photosensitive layer formed on the electrically conductive substrate, wherein a surface layer of the organic photosensitive layer includes at least a binder resin comprising a polymer compound and a charge transport material comprising a low molecule compound, the surface layer having an oxygen gas permeation coefficient of 5×10−13 cm3(STP)*cm/s*cm2*cmHg or less.

An electrophotographic imaging apparatus comprising:

a developing unit utilizing liquid developer, wherein the liquid developer is able to directly contact the surface of an electrophotographic photoreceptor comprising an organic photosensitive layer formed on an electrically conductive substrate, wherein a surface layer of the organic photosensitive layer includes at least a binder resin comprising a polymer compound and a charge transport material comprising a low molecule compound, the surface layer having an oxygen gas permeation coefficient of 5×10−13 cm3(STP)*cm/s*cm2*cmHg or less.

An electrophotographic cartridge, comprising:

an electrophotographic photoreceptor comprising an organic photosensitive layer formed on an electrically conductive substrate, wherein a surface layer of the organic photosensitive layer includes at least a binder resin comprising a polymer compound and a charge transport material comprising a low molecule compound, the surface layer having an oxygen gas permeation coefficient of 5×10−13 cm3(STP)*cm/s*cm2*cmHg or less;
a charging device that charges the electrophotographic photoreceptor;
a developing device which develops an electrostatic latent image formed on the electrophotographic photoreceptor;
and
a cleaning device which cleans a surface of the electrophotographic photoreceptor;
wherein the electrophotographic cartridge is attachable to or detachable from an image forming apparatus.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

10/680,421Filed 8 Oct 2003

Priority

KR 10-2002-00614929 Oct 2002

Published

US 2004/0137345 A115 Jul 2004

Granted

18 Jul 2006

Term ends

Not estimatedThe source records don’t support an estimate.

Classification14 codes

G03G 5/0609
Acyclic or carbocyclic compounds: containing oxygen
G03G 5/047
Photoconductive layers characterised by having two or more layers or characterised by their composite structure: characterised by the…
G03G 5/051
Inert supplements: organic non-macromolecular compounds
G03G 5/056
Obtained otherwise than by reactions only involving carbon-to-carbon unsatured bonds: polyesters

Electrophotographic photoreceptor for wet development

Life of this patent

Electrophotographic photoreceptor for wet development

Life of this patent

Abstract

Claims24