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CN-114967384-B - Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus

CN114967384BCN 114967384 BCN114967384 BCN 114967384BCN-114967384-B

Abstract

The invention relates to an electrophotographic photosensitive member, a process cartridge, and an electrophotographic apparatus. The electrophotographic photosensitive member has a cylindrical support, and a photosensitive layer, wherein the support has a surface formed of Al and/or an Al alloy, and the surface of the support includes an Al crystal grain having (alpha) a {001} oriented face having-15 DEG or more and less than +15 DEG, a {101} oriented face having-15 DEG or more and less than +15 DEG, and (gamma) a {111} oriented face having-15 DEG or more and less than +15 DEG, the ratio of the area occupied by the Al crystal grain having (gamma) to the total area of the support surface is 10% or less, and the ratio of the area occupied by any one of the Al crystal grain having (alpha) and the Al crystal grain having (beta) is 60% or more.

Inventors

  • TAKATA KOJI
  • Shinozuka Masaru
  • Motoya Yamada

Assignees

  • 佳能株式会社

Dates

Publication Date
20260508
Application Date
20220225
Priority Date
20210226

Claims (9)

  1. 1. An electrophotographic photosensitive member is characterized by comprising a cylindrical support, and a photosensitive layer, wherein The support has a surface formed of an Al alloy, The support body is: an Al alloy containing Cu in an amount of 0.05 to 0.2 mass% and Mn in an amount of 1.0 to 1.5 mass%, or An Al alloy containing Si in an amount of 0.2 to 0.6 mass% and Mg in an amount of 0.45 to 0.9 mass%, and The surface of the support includes Al grains having (Alpha) a {001} oriented plane having a range of-15 DEG or more and less than +15 DEG, (Beta) a {101} oriented plane having a range of-15 DEG or more and less than +15 DEG, and (Gamma) a {111} oriented plane having a range of-15 DEG or more and less than +15 DEG, The ratio of the area occupied by the Al crystal grains having (γ) to the total area of the surface of the support is 10% or less, and the ratio of the area occupied by any one of the Al crystal grains having (α) and the Al crystal grains having (β) is 60% or more.
  2. 2. The electrophotographic photosensitive member according to claim 1, wherein a ratio of an area occupied by the Al crystal grains having (β) to a total area of a surface of the support is 67% or more.
  3. 3. The electrophotographic photosensitive member according to claim 1, wherein a ratio of an area occupied by the Al crystal grains having (β) to a total area of a surface of the support is 75% or more.
  4. 4. The electrophotographic photosensitive member according to claim 1, wherein a ratio of an area occupied by the Al crystal grains having (α) to a total area of a surface of the support is 67% or more.
  5. 5. The electrophotographic photosensitive member according to claim 1, wherein a ratio of an area occupied by the Al crystal grains having (α) to a total area of a surface of the support is 75% or more.
  6. 6. The electrophotographic photosensitive member according to any one of claims 1 to 5, wherein a ratio of an area occupied by the Al crystal grains having (γ) to a total area of a surface of the support is 5% or less.
  7. 7. The electrophotographic photosensitive member according to any one of claims 1 to 5, wherein an average area of Al crystal grains on a surface of the support is 5 μm 2 or more.
  8. 8. A process cartridge, characterized in that it integrally supports the electrophotographic photosensitive member according to any one of claims 1 to 7 and at least one unit selected from the group consisting of a charging unit, a developing unit, and a cleaning unit, and is detachably mounted to a main body of an electrophotographic apparatus.
  9. 9. An electrophotographic apparatus characterized by comprising the electrophotographic photosensitive member according to any one of claims 1 to 7, a charging unit, an exposure unit, a developing unit, and a transfer unit.

Description

Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus Technical Field The present invention relates to an electrophotographic photosensitive member, a process cartridge including the electrophotographic photosensitive member, and an electrophotographic apparatus including the electrophotographic photosensitive member. Background In recent years, diversification of users of electrophotographic apparatuses has progressed, and demands for output images having higher image quality than before have been increasing. International publication No. wo2019/077705 describes a technique in which stress values in a conductive support are in the range of-30 to 5MPa as a technique related to image quality improvement. Japanese patent application laid-open No.2009-150958 describes a technique of heating an element tube made of an aluminum alloy at 190 ℃ to 550 ℃ before cutting as a technique of improving image quality from the viewpoint of accuracy. In addition, japanese patent application laid-open No.2017-111409 describes a technique in which the average area of crystal grains of an Al alloy having a specific composition is 3 to 100 μm 2. According to the studies of the present inventors, the electrophotographic photosensitive members described in international publication No. wo2019/077705, japanese patent application laid-open No.2009-150958, and japanese patent application laid-open No.2017-111409 have a problem that the outline of points and lines forming an output image is easily blurred. It is therefore an object of the present invention to provide an electrophotographic photosensitive member capable of suppressing blurring of dots and lines forming an output image. Disclosure of Invention The above object is achieved by the present invention as follows. That is, the electrophotographic photosensitive member according to one aspect of the present invention is an electrophotographic photosensitive member having a cylindrical support and a photosensitive layer, wherein The support body has a surface formed of Al and/or an Al alloy, and The surface of the support includes Al grains having (Alpha) a {001} oriented plane having a range of-15 DEG or more and less than +15 DEG, (Beta) a {101} oriented plane having a range of-15 DEG or more and less than +15 DEG, and (Gamma) a {111} oriented plane having a range of-15 DEG or more and less than +15 DEG, The ratio of the area occupied by the Al crystal grains having (γ) to the total area of the surface of the support is 10% or less, and the ratio of the area occupied by any one of the Al crystal grains having (α) and the Al crystal grains having (β) is 60% or more. In addition, a process cartridge according to another aspect of the present invention integrally supports the electrophotographic photosensitive member and at least one unit selected from the group consisting of a charging unit, a developing unit, and a cleaning unit, and the process cartridge is detachably mounted to the main body of the electrophotographic apparatus. In addition, an electrophotographic apparatus according to still another aspect of the present invention includes an electrophotographic photosensitive member, and a charging unit, an exposing unit, a developing unit, and a transferring unit. Further features of the invention will become apparent from the following description of exemplary embodiments with reference to the attached drawings. Drawings Fig. 1A, 1B, and 1C are diagrams showing the distribution of Al crystal grains. Fig. 2 is a diagram showing measurement positions of Al crystal grains. Fig. 3 is a diagram showing one example of a schematic configuration of an electrophotographic apparatus having a process cartridge including an electrophotographic photosensitive member. Detailed Description Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Hereinafter, the present invention will be described in detail with reference to preferred embodiments. As a result of the studies by the present inventors, it has been found that the techniques described in international publication No. wo2019/077705, japanese patent application laid-open No.2009-150958, and japanese patent application laid-open No.2017-111409 have a possibility of slight potential variation due to minute resistance unevenness of the conductive support occurring in the exposed portion of the electrophotographic photosensitive member. As a result, blurring of points forming an output image is considered to easily occur. In order to solve the above technical problems occurring in the prior art, the present inventors studied the crystal orientation of the surface of an aluminum support. As a result of the above study, it has been found that the above technical problems can be solved by using the following electrophotographic photosensitive member according to the present invention. That is, the electrophotographic photose