ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS

• US 20160327876A1
• Filed: 04/18/2016
• Published: 11/10/2016
• Est. Priority Date: 05/07/2015
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Miyauchi, Yohei, Yoshimura, Kimihiro, Ogaki, Harunobu, Okuda, Atsushi, Yamamoto, Yuki, Kitamura, Wataru, Murakami, Mai
• Granted Patent: US 9,791,792 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G03G 5/0507 Inorganic compounds
• CPC Class Codes: G03G 5/14704 comprising inorganic material

Abstract

An electrophotographic photosensitive member includes a surface layer with a hexagonal boron nitride dispersed therein. The hexagonal boron nitride has a graphitization index (GI) of at least 3.0 and less than 15.0.

Claims

1. An electrophotographic photosensitive member comprising:

a support; and

a photosensitive layer on the support;

wherein

a surface layer of the electrophotographic photosensitive member comprises;

a binder resin; and

a hexagonal boron nitride dispersed with the binder resin of the surface layer;

the hexagonal boron nitride has a graphitization index (GI) of at least 3.0 and less than 15.0.

2. The electrophotographic photosensitive member according to claim 1, wherein the hexagonal boron nitride is a hexagonal boron nitride which is hydrophobically treated.

3. The electrophotographic photosensitive member according to claim 1, wherein the hexagonal boron nitride is a hexagonal boron nitride which is surface-treated with a silane coupling agent.

4. The electrophotographic photosensitive member according to claim 1, wherein a content of the hexagonal boron nitride is 1% by volume or more and 20% by volume or less with respect to the whole volume of the surface layer.

5. A process cartridge detachably attachable to a main body of an electrophotographic apparatus, the process cartridge integrally supporting:

an electrophotographic photosensitive member; and

at least one device selected from the group consisting of;

a charging device for charging a surface of the electrophotographic photosensitive member,

a developing device for developing an electrostatic latent image formed on the electrophotographic photosensitive member by using a toner to form a toner image,

a transfer device for transferring the toner image to a transfer medium, and

a cleaning device having a cleaning blade for cleaning the electrophotographic photosensitive member while contacting with the surface of the electrophotographic photosensitive member;

wherein,

the electrophotographic photosensitive member comprises a support, and a photosensitive layer on the support;

a surface layer of the electrophotographic photosensitive member comprises a binder resin, and a hexagonal boron nitride dispersed with the binder resin of the surface layer;

the hexagonal boron nitride has a graphitization index (GI) of at least 3.0 and less than 15.0.

6. An electrophotographic apparatus comprising:

an electrophotographic photosensitive member;

a charging device for charging a surface of the electrophotographic photosensitive member;

an image exposing device for exposing the charged electrophotographic photosensitive member to form an electrostatic latent image;

a developing device for developing the electrostatic latent image formed on the electrophotographic photosensitive member by using a toner to form a toner image;

a transfer device for transferring the toner image to a transfer medium; and

a cleaning device having a cleaning blade for cleaning the electrophotographic photosensitive member while contacting with the surface of the electrophotographic photosensitive member;

wherein,

the electrophotographic photosensitive member comprises a support, and a photosensitive layer on the support;

a surface layer of the electrophotographic photosensitive member comprises a binder resin, and a hexagonal boron nitride dispersed with the binder resin of the surface layer;

the hexagonal boron nitride has a graphitization index (GI) of at least 3.0 and less than 15.0.