ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS

• US 20160187794A1
• Filed: 12/16/2015
• Published: 06/30/2016
• Est. Priority Date: 12/26/2014
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Okuda, Atsushi, Nakamura, Nobuhiro, Noguchi, Kazunori, Maruyama, Akihiro, Fujii, Atsushi, Ishiduka, Yuka, Yamamoto, Yuki, Sakuma, Kazuko, Ikezue, Tatsuya
• Granted Patent: US 9,599,917 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G03G 5/0567 Other polycondensates comprising oxygen atoms in the main chain; Phenol resins
• CPC Class Codes: G03G 5/142 Inert intermediate layers
• CPC Class Codes: G03G 5/144 comprising inorganic material

Abstract

An electrophotographic photosensitive member that abuts with a charging member and/or a developer carrying member with an abutting member interposed therebetween, wherein the electrophotographic photosensitive member has a first portion and a second portion abutting with the abutting member along the longitudinal direction thereof, the electrophotographic photosensitive member has a support, a charge generation layer containing a charge generating material and a polyacetal resin, and a surface layer in this order, the electrophotographic photosensitive member has, in the first portion, an undercoat layer containing a polymerized product of a composition including an electron transporting material and a cross-linking agent, the layer being adjacent to a surface of the charge generation layer, facing the support, and the electrophotographic photosensitive member has, in the second portion, an intermediate layer containing a metal oxide particle and a phenol resin, the layer being between and adjacent to the support and the charge generation layer.

Claims

1. An electrophotographic photosensitive member that abuts with at least any member selected from the group consisting of a charging member that charges the electrophotographic photosensitive member and a developer carrying member that feeds a developer to the electrophotographic photosensitive member, with an abutting member interposed therebetween, wherein

the electrophotographic photosensitive member has a first portion and a second portion different from the first portion along the longitudinal direction thereof, and abuts with the abutting member on the second portion,

the electrophotographic photosensitive member has a support, a charge generation layer comprising a charge generating material and a polyacetal resin, and a surface layer in this order,

the electrophotographic photosensitive member has, in the first portion, an undercoat layer comprising a polymerized product of a composition comprising an electron transporting material and a cross-linking agent, the undercoat layer being adjacent to a surface of the charge generation layer, and the surface facing the support, and

the electrophotographic photosensitive member has, in the second portion, an intermediate layer comprising a metal oxide particle and a phenol resin, the layer being between and adjacent to the support and the charge generation layer.

2. The electrophotographic photosensitive member according to claim 1, wherein the intermediate layer is continuously formed from in the second portion to in the first portion.

3. The electrophotographic photosensitive member according to claim 1, wherein a ten-point average roughness Rz_JIS (standard length:

0.8 mm) of a surface of the intermediate layer according to JIS B 0601;

2001 is 0.5 μ

m or more and 2.5 μ

m or less.

4. The electrophotographic photosensitive member according to claim 1, wherein an average thickness of the charge generation layer in the second portion of the electrophotographic photosensitive member is less than an average thickness of the charge generation layer in the first portion thereof.

5. A process cartridge detachably attachable to a main body of an electrophotographic apparatus, comprising an electrophotographic photosensitive member, and at least any member selected from the group consisting of a charging member that charges the electrophotographic photosensitive member and a developer carrying member that feeds a developer to the electrophotographic photosensitive member,

the electrophotographic photosensitive member that abuts with at least any member selected from the group consisting of the charging member and the developer carrying member, with an abutting member interposed therebetween, wherein

the electrophotographic photosensitive member has a first portion and a second portion different from the first portion along the longitudinal direction thereof, and abuts with the abutting member on the second portion,

the electrophotographic photosensitive member has a support, a charge generation layer comprising a charge generating material and a polyacetal resin, and a surface layer in this order,

the electrophotographic photosensitive member has, in the first portion, an undercoat layer comprising a polymerized product of a composition comprising an electron transporting material and a cross-linking agent, the undercoat layer being adjacent to a surface of the charge generation layer, and the surface facing the support, and

the electrophotographic photosensitive member has, in the second portion, an intermediate layer comprising a metal oxide particle and a phenol resin, the layer being between and adjacent to the support and the charge generation layer.

6. An electrophotographic apparatus comprising an electrophotographic photosensitive member, and at least any member selected from the group consisting of a charging member that charges the electrophotographic photosensitive member and a developer carrying member that feeds a developer to the electrophotographic photosensitive member,

the electrophotographic photosensitive member that abuts with at least any member selected from the group consisting of the charging member and the developer carrying member, with an abutting member interposed therebetween, wherein

the electrophotographic photosensitive member has a first portion and a second portion different from the first portion along the longitudinal direction thereof, and abuts with the abutting member on the second portion,

the electrophotographic photosensitive member has a support, a charge generation layer comprising a charge generating material and a polyacetal resin, and a surface layer in this order,

the electrophotographic photosensitive member has, in the first portion, an undercoat layer comprising a polymerized product of a composition comprising an electron transporting material and a cross-linking agent, the undercoat layer being adjacent to a surface of the charge generation layer, and the surface facing the support, and

the electrophotographic photosensitive member has, in the second portion, an intermediate layer comprising a metal oxide particle and a phenol resin, the layer being between and adjacent to the support and the charge generation layer.