ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS

• US 20160378002A1
• Filed: 05/31/2016
• Published: 12/29/2016
• Est. Priority Date: 06/24/2015
• Status: Active Grant

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Tanaka, Daisuke, Sugiyama, Kazumichi, Murakami, Takeshi, Kawaguchi, Daisuke, Ito, Yota
• Granted Patent: US 9,772,569 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G03G 15/75 Details relating to xerographic drum, band or plate, e.g. replacing, testing electrographic recording members per se G03G5/00
• CPC Class Codes: G03G 21/18 using a processing cartridge , whereby the process cartridge comprises at least two image processing means in a single unit
• CPC Class Codes: G03G 5/144 comprising inorganic material

Abstract

An undercoat layer of an electrophotographic photosensitive member includes a binder resin, and a complex particle composed of a core particle coated with tin oxide doped with zinc.

Claims

1. An electrophotographic photosensitive member comprising a support, an undercoat layer on the support, and a photosensitive layer on the undercoat layer,

wherein the undercoat layer comprises:

a binder resin, and

a complex particle composed of a core particle coated with tin oxide doped with zinc, and

the mass ratio of the complex particle to the binder resin is 1/1 or more.

2. The electrophotographic photosensitive member according to claim 1, wherein the core particle is at least one selected from the group consisting of a zinc oxide particle, a titanium oxide particle, a barium sulfate particle and an aluminum oxide particle.

3. The electrophotographic photosensitive member according to claim 1, wherein the mass proportion of the tin oxide to the complex particle is 10% by mass or more and 60% by mass or less.

4. The electrophotographic photosensitive member according to claim 1, wherein the mass ratio of the complex particle to the binder resin is 4/1 or less.

5. The electrophotographic photosensitive member according to claim 1, wherein the undercoat layer further comprises a tin oxide particle doped with zinc.

6. The electrophotographic photosensitive member according to claim 5, wherein the volume proportion of the tin oxide particle doped with zinc to the complex particle is 0.1% by volume or more and 20% by volume or less.

7. The electrophotographic photosensitive member according to claim 1, wherein the binder resin is a phenol resin or a polyurethane resin.

8. The electrophotographic photosensitive member according to claim 1, wherein the electrophotographic photosensitive member has an intermediate layer containing a polymerized product of a composition containing an electron transporting material having a reactive functional group,

the intermediate layer is disposed between the undercoat layer and the photosensitive layer.

9. The electrophotographic photosensitive member according to claim 8, wherein the polymerized product of a composition containing an electron transporting material having a reactive functional group is a polymerized product of a composition containing the electron transporting material having a reactive functional group, a crosslinking agent, and a resin having a reactive functional group.

10. The electrophotographic photosensitive member according to claim 8, wherein the volume of the complex particle in the total volume of the undercoat layer is 0.2 times or more and 2 times or less the volume of the electron transporting material in the total volume of the composition of the intermediate layer.

11. A process cartridge detachably mountable on the main body of an electrophotographic apparatus, and integrally supporting an electrophotographic photosensitive member, and at least one unit selected from the group consisting of a charging unit, a developing unit and a cleaning unit,

wherein the electrophotographic photosensitive member comprises a support, an undercoat layer on the support, and a photosensitive layer on the undercoat layer,

wherein the undercoat layer comprises:

a binder resin, and

a complex particle composed of a core particle coated with tin oxide doped with zinc, and

the mass ratio of the complex particle to the binder resin is 1/1 or more.

12. An electrophotographic apparatus comprising an electrophotographic photosensitive member, a charging unit, an exposure unit, a developing unit, and a transfer unit,

wherein the electrophotographic photosensitive member comprises a support, an undercoat layer on the support, and a photosensitive layer on the undercoat layer,

wherein the undercoat layer comprises:

a binder resin, and

a complex particle composed of a core particle coated with tin oxide doped with zinc, and

the mass ratio of the complex particle to the binder resin is 1/1 or more.