Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus

• US 9,864,285 B2
• Filed: 06/16/2016
• Issued: 01/09/2018
• Est. Priority Date: 06/25/2015
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Nishi, Masashi, Sekido, Kunihiko, Sekiya, Michiyo, Tagami, Kei, Yamamoto, Yuki
• Primary Examiner(s): Rodee, Christopher D
• Application Number:
  US15/184,073
• Publication Number:
  US 20160378000A1
• Time in Patent Office: 572 Days
• 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 5/0696 Phthalocyanines
• CPC Class Codes: G03G 5/071 obtained by reactions only involving carbon-to-carbon unsaturated bonds G03G5/078 takes precedence
• CPC Class Codes: G03G 5/142 Inert intermediate layers

Abstract

Provided is an electrophotographic photosensitive member comprising a support, an intermediate layer formed on the support, a charge generating layer formed directly on the intermediate layer, and a charge transporting layer formed on the charge generating layer, in which the intermediate layer contains a compound represented by the formula (1).

Claims

1. An electrophotographic photosensitive member, comprising:

a support;

an intermediate layer formed on the support, the intermediate layer containing a polymerized product of a composition containing a compound represented by formula (1);

a charge generating layer formed directly on the intermediate layer, the charge generating layer containing a phthalocyanine pigment and a resin; and

a charge transporting layer formed on the charge generating layer, wherein

when an averaged sectional difference of elevation in a calculated length range of from 0.1 to 100 μ

m in a surface of the intermediate layer on a charge generating layer side is measured, in a calculated length range of from 0.5 to 1.5 times of a calculated length at which a maximum of the averaged sectional difference of elevation (Rmk,max) is expressed, a value for the averaged sectional difference of elevation (Rmk) is 0.05 μ

m or more, where the averaged sectional difference of elevation Rmk is calculated by obtaining three-dimensional surface profile data z(x,y) on the intermediate layer by measuring vertical direction elevation data z(x,y) corresponding to horizontal direction coordinates (x,y), (1) dividing the resultant surface profile data into meshes each having a length of one side of L, (2) averaging the elevations z(x,y) in each mesh having a length of one side of L, (3) calculating in each mesh sectional differences of elevation from differences of elevation from the surrounding meshes, and (4) averaging the resultant sectional differences of elevation over all the meshes, with the resultant value being Rmk

2. An electrophotographic photosensitive member according to claim 1, wherein the R² represents a group represented by the formula (2):

3. An electrophotographic photosensitive member according to claim 1, wherein the intermediate layer further contains particles having a number-average particle diameter of 0.2 μ

m or less.

4. An electrophotographic photosensitive member according to claim 1, wherein in the calculated length range of from 0.5 to 1.5 times of the calculated length at which the maximum of the averaged sectional difference of elevation (Rmk,max) is expressed, the value for the averaged sectional difference of elevation (Rmk) is 0.07 μ

m or more.

5. An electrophotographic photosensitive member according to claim 1, wherein the resin comprises a resin having at least a structure represented by the formula (3):

6. A process cartridge, comprising:

an electrophotographic photosensitive member; and

at least one unit selected from the group consisting of a charging unit, a developing unit, a transferring unit, and a cleaning unit,

the process cartridge integrally supporting the electrophotographic photosensitive member and the at least one unit, and the process cartridge being removably mounted onto a main body of an electrophotographic apparatus,

the electrophotographic photosensitive member comprising;

a support;

an intermediate layer formed on the support, the intermediate layer containing a polymerized product of a composition containing a compound represented by formula (1);

a charge generating layer formed directly on the intermediate layer, the charge generating layer containing a phthalocyanine pigment and a resin; and

a charge transporting layer formed on the charge generating layer, wherein

when an averaged sectional difference of elevation in a calculated length range of from 0.1 to 100 μ

m in a surface of the intermediate layer on a charge generating layer side is measured, in a calculated length range of from 0.5 to 1.5 times of a calculated length at which a maximum of the averaged sectional difference of elevation (Rmk,max) is expressed, a value for the averaged sectional difference of elevation (Rmk) is 0.05 μ

m or more, where the averaged sectional difference of elevation Rmk is calculated by obtaining three-dimensional surface profile data z(x,y) on the intermediate layer by measuring vertical direction elevation data z(x,y) corresponding to horizontal direction coordinates (x,y), (1) dividing the resultant surface profile data into meshes each having a length of one side of L, (2) averaging the elevations z(x,y) in each mesh having a length of one side of L, (3) calculating in each mesh sectional differences of elevation from differences of elevation from the surrounding meshes, and (4) averaging the resultant sectional differences of elevation over all the meshes, with the resultant value being Rmk

7. An electrophotographic apparatus, comprising:

an electrophotographic photosensitive member;

a charging unit;

an exposing unit;

a developing unit; and

a transferring unit,

the electrophotographic photosensitive member comprising;

a support;

an intermediate layer formed on the support, the intermediate layer containing a polymerized product of a composition containing a compound represented by formula (1);

a charge generating layer formed directly on the intermediate layer, the charge generating layer containing a phthalocyanine pigment and a resin; and

a charge transporting layer formed on the charge generating layer, wherein

when an averaged sectional difference of elevation in a calculated length range of from 0.1 to 100 μ

m in a surface of the intermediate layer on a charge generating layer side is measured, in a calculated length range of from 0.5 to 1.5 times of a calculated length at which a maximum of the averaged sectional difference of elevation (Rmk,max) is expressed, a value for the averaged sectional difference of elevation (Rmk) is 0.05 μ

m or more, where the averaged sectional difference of elevation Rmk is calculated by obtaining three-dimensional surface profile data z(x,y) on the intermediate layer by measuring vertical direction elevation data z(x,y) corresponding to horizontal direction coordinates (x,y), (1) dividing the resultant surface profile data into meshes each having a length of one side of L, (2) averaging the elevations z(x,y) in each mesh having a length of one side of L, (3) calculating in each mesh sectional differences of elevation from differences of elevation from the surrounding meshes, and (4) averaging the resultant sectional differences of elevation over all the meshes, with the resultant value being Rmk