CN-114967383-B - Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus

Abstract

The invention relates to an electrophotographic photosensitive member, a method of manufacturing the same, a process cartridge, and an electrophotographic apparatus. An electrophotographic photosensitive member is provided which suppresses image defects caused by its support and reduces long-term potential fluctuations. The electrophotographic photosensitive member is an electrophotographic photosensitive member comprising a cylindrical support and a photosensitive layer formed on the support, wherein the support has a surface formed of Al and/or an Al alloy, and wherein an IR peak area ratio A of the surface of the support determined by Fourier transform infrared spectroscopy satisfies the condition that A≥0.50, wherein the IR peak area ratio A represents a ratio a/z of a peak area "a" in a range of 1,016cm ‑1 or more and 1,130cm ‑1 or less to a peak area "z" in a range of 650cm ‑1 or more and 1,130cm ‑1 or less.

Inventors

• Shinozuka Masaru
• Motoya Yamada
• TAKATA KOJI

Assignees

• 佳能株式会社

Dates

Publication Date

20260505

Application Date

20220224

Priority Date

20210226

Claims (7)

1. 1. An electrophotographic photosensitive member, characterized by comprising: a cylindrical support body, and A photosensitive layer formed on the support, Wherein the support has a surface formed of Al and/or an Al alloy, and Wherein the IR peak area ratio a of the surface of the support determined by fourier transform infrared spectroscopy satisfies the following condition: A≥0.75 Wherein the IR peak area ratio A represents a ratio a/z of a peak area "a" in a range of 1,016cm -1 or more and 1,130cm -1 or less to a peak area "z" in a range of 650cm -1 or more and 1,130cm -1 or less.
2. 2. The electrophotographic photosensitive member according to claim 1, wherein the IR peak area ratio B of the surface of the support determined by fourier transform infrared spectroscopy satisfies the following condition: B≤0.20 Wherein the IR peak area ratio B represents a ratio B/z of a peak area "B" in a range of 831cm -1 or more and 1,015cm -1 or less to a peak area "z" in a range of 650cm -1 or more and 1,130cm -1 or less.
3. 3. An electrophotographic photosensitive member according to claim 1 or 2, wherein in the support, when an element ratio O/Al of an outermost surface of the support determined by X-ray photoelectron spectroscopy is represented by X, and a depth of a region satisfying a value of x±0.1x is represented by D, D is 40nm or more and 1 μm or less.
4. 4. The electrophotographic photosensitive member according to claim 1 or 2, wherein the support is formed of an Al alloy, and the Al alloy contains, with respect to the total mass of the Al alloy, 0.6 mass% or less of Si, 0.7 mass% or less of Fe, 0.05 mass% or more and 0.20 mass% or less of Cu, 1.0 mass% or more and 1.5 mass% or less of Mn, and 0.10 mass% or less of Zn.
5. 5. A process cartridge, characterized in that it integrally supports the electrophotographic photosensitive member according to any one of claims 1 to 4 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.
6. 6. An electrophotographic apparatus, characterized in that it comprises the electrophotographic photosensitive member according to any one of claims 1 to 4, a charging unit, an exposing unit, a developing unit, and a transferring unit.
7. 7. A method for manufacturing an electrophotographic photosensitive member, characterized in that the electrophotographic photosensitive member comprises a cylindrical support and a photosensitive layer formed on the support, Wherein forming the support comprises subjecting a cylindrical body formed of Al and/or an Al alloy to a dipping treatment with pure water to obtain the support, Wherein the temperature of the pure water is 91 ℃ or more and 98 ℃ or less, and immersing the cylindrical body in the pure water for a time of 60 seconds or more and 300 seconds or less, and Wherein the IR peak area ratio a of the surface of the support determined by fourier transform infrared spectroscopy satisfies the following condition: A≥0.75 Wherein the IR peak area ratio A represents a ratio a/z of a peak area "a" in a range of 1,016cm -1 or more and 1,130cm -1 or less to a peak area "z" in a range of 650cm -1 or more and 1,130cm -1 or less.

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, an electrophotographic apparatus, and a method of manufacturing the electrophotographic photosensitive member. Background The electrophotographic photosensitive member is used as an image bearing member in an electrophotographic image forming apparatus (e.g., a printer or a multifunction peripheral). The electrophotographic photosensitive member includes a support and a photosensitive layer formed on the support. The roughness of the surface of the support fluctuates according to the material of the support. The roughness of the surface of the support may affect the formation of latent images during electrophotography to cause image defects. In japanese patent application laid-open No. H01-29852, a technique is described that includes treating the surface of a cylindrical support to suppress image defects caused by roughness of the support surface. Disclosure of Invention According to the studies of the inventors of the present invention, the electrophotographic photosensitive member described in japanese patent application laid-open No. H01-29852, although image defects caused by a support can be suppressed, involves a problem of large long-term potential fluctuation. In view of the above, the present inventors studied a technique of treating the surface of a cylindrical support, by which both suppression of image defects and reduction of long-term potential fluctuations can be achieved. An object of the present invention is to provide an electrophotographic photosensitive member which suppresses image defects caused by its support and reduces long-term potential fluctuations. This object is achieved by the invention described below. That is, according to the present invention, there is provided an electrophotographic photosensitive member comprising a cylindrical support, and a photosensitive layer formed on the support, wherein the support has a surface formed of Al and/or an Al alloy, and wherein an IR peak area ratio A of the surface of the support determined by Fourier transform infrared spectroscopy satisfies the following condition: A≥0.50 Wherein the IR peak area ratio A represents a ratio a/z of a peak area "a" in a range of 1,016cm -1 or more and 1,130cm -1 or less to a peak area "z" in a range of 650cm -1 or more and 1,130cm -1 or less. In addition, according to the present invention, there is provided a process cartridge comprising the above-mentioned electrophotographic photosensitive member, and at least one unit selected from the group consisting of a charging unit, a developing unit, and a cleaning unit, the process cartridge integrally supporting the electrophotographic photosensitive member and the at least one unit, and being detachably mounted to a main body of an electrophotographic apparatus. In addition, according to the present invention, there is provided an electrophotographic apparatus including the above-described electrophotographic photosensitive member, a charging unit, an exposing unit, a developing unit, and a transferring unit. Further, according to the present invention, there is provided a method for producing an electrophotographic photosensitive member comprising a cylindrical support and a photosensitive layer formed on the support, wherein forming the support comprises subjecting a cylindrical body formed of Al and/or an Al alloy to a dipping treatment with pure water to obtain the support, wherein the temperature of the pure water is 91 ℃ or more and 98 ℃ or less, and the cylindrical body is immersed in the pure water for a time of 60 seconds or more and 300 seconds or less, and wherein an IR peak area ratio a of a surface of the support determined by fourier transform infrared spectrometry satisfies the following condition: A≥0.50 Wherein the IR peak area ratio A represents a ratio a/z of a peak area "a" in a range of 1,016cm -1 or more and 1,130cm -1 or less to a peak area "z" in a range of 650cm -1 or more and 1,130cm -1 or less. According to the present invention, it is possible to provide an electrophotographic photosensitive member which suppresses image defects caused by its support and reduces long-term potential fluctuations. Further features of the invention will become apparent from the following description of exemplary embodiments with reference to the attached drawings. Drawings Fig. 1 is a diagram showing an example of a schematic configuration of an electrophotographic apparatus including a process cartridge including an electrophotographic photosensitive member of the present invention. Fig. 2 is a graph schematically showing IR peak area ratios a and B defined in the present invention. Detailed Description The invention is described in detail below by way of exemplary embodiments. [ El