Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and method of manufacturing electrophotographic photosensitive member

a technology of electrophotography and photosensitive parts, which is applied in the direction of electrographic process equipment, instruments, coatings, etc., can solve the problem of difficult to increase the residual potential at the time of forming an imag

Active Publication Date: 2013-12-05
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an improved electrophotography photosensor that prevents leaks during use without requiring a special material or processing steps. This results in better image quality and reduced maintenance costs compared to existing methods.

Problems solved by technology

This patent describes different technical solutions involving adding a special type of metal oxide particle called tin oxide or other materials into the layers between the support and the photosensitive layer to improve its performance and durability during use. These techniques help prevent damage caused by external factors like light, heat, and abrasion. Additionally, these techniques can also enhance the amount of charge injected into the photosensor without increasing the size of the support needed. Overall, this patent provides technical means for producing an improved electrophotography photosensitive member.

Method used

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  • Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and method of manufacturing electrophotographic photosensitive member
  • Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and method of manufacturing electrophotographic photosensitive member
  • Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and method of manufacturing electrophotographic photosensitive member

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[0135]Hereinafter, the present invention is described in more detail by way of specific examples. It should be noted that the present invention is not limited thereto. The “part(s)” in the examples refers to “part(s) by mass”. All of the titanium oxide (TiO2) particle (core particle) in various titanium oxide particle coated with tin oxide used in the examples and the comparative examples are spherical particle with a purity of 97.7% and a Bet value of 7.7 m2 / g produced by a sulfuric acid method.

[0136]

[0137](Preparation Example of Coating Liquid for the Conductive Layer 1)

[0138]In a sand mill using 450 parts of glass beads each having a diameter of 0.8 mm, 207 parts of titanium oxide (TiO2) particle coated with tin oxide (SnO2) doped with phosphorus (P) as the metal oxide particle (powder resistivity: 1.0×103 Ω·cm, average primary particle diameter: 220 nm), 144 parts of a phenol resin (phenol resin monomer / oligomer) (trade name: Priohphen J-325 manufactured by Dainippon Ink & Chem

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Abstract

Provided are an electrophotographic photosensitive member in which leakage doesn't easily occur, a process cartridge and an electrophotographic apparatus each including the electrophotographic photosensitive member, and a method of manufacturing the electrophotographic photosensitive member. The electrophotographic photosensitive member includes a conductive layer including titanium oxide particle coated with tin oxide doped with a hetero element. When an absolute value of a maximum current amount flowing through the conductive layer in a case of performing a test of applying −1.0 kV including DC voltage to the conductive layer is defined as Ia, and an absolute value of a current amount flowing through the conductive layer in a case where a decrease ratio of a current amount per minute reaches 1% or less for the first time is defined as Ib, the relations of Ia≦6000 and 10≦Ib are satisfied. A volume resistivity of the conductive layer before the test is 1.0×108 Ω·cm to 5.0×1012 Ω·cm.

Description

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Claims

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Application Information

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Owner CANON KK
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