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Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus

A technology of electrophotography and photosensitive member, which is applied to the equipment of electric recording technology using charge pattern, the electric recording technology of applying charge pattern, optics, etc., which can solve the problems of photosensitive member discharge breakdown and uneven charging, and achieve the purpose of suppressing The effect of image defects

Active Publication Date: 2011-05-11
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, any such contact charging system as described above involves problems such as charging unevenness and discharge breakdown of the photosensitive member due to direct voltage application.

Method used

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  • Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
  • Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
  • Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] The properties of the resin were measured or evaluated by the following methods.

[0091] (1) Content of unit (A2) in polyolefin

[0092] The acid value of the polyolefin resin is measured in accordance with JIS K5407, and the content of unsaturated carboxylic acid (graft ratio) is determined from this value with the following equation.

[0093] Unit (A2) content (mass %)=(mass of grafted unsaturated carboxylic acid) / (mass of raw polyolefin resin)×100

[0094] (2) Composition of resin other than unit (A2)

[0095] The content of the components other than the unit (A2) was determined by using an analyzer (manufactured by Varian Technologies Japan Limited, 300 MHz) in o-dichlorobenzene (d4) at 120°C 1 H-NMR and 13 C-NMR analysis to determine. Considering the quantitative 13 C-NMR analysis was performed by using the gated decoupling method. The method of synthesizing the polyolefin resin is not limited to Production Example 1, and it can be obtained by using, for exa...

Embodiment 2

[0111] An electrophotographic photosensitive member was produced in the same manner as in Example 1 except that the polyolefin resin used in the conductive layer in Example 1 was changed to Polyolefin Resin O-2. Resin O-2 is formed of a repeating structural unit (A1) obtained by copolymerizing polyethylene, a repeating structural unit (A2) obtained by copolymerizing maleic anhydride, and a repeating structural unit (A3) obtained by copolymerizing ethyl methacrylate, and its It has a ratio "(A1) / (A2) / (A3)" of 80.00 / 2.00 / 18.00 (mass %). This electrophotographic photosensitive member was evaluated in the same manner as in Example 1.

Embodiment 3

[0113] An electrophotographic photosensitive member was produced in the same manner as in Example 1 except that the polyolefin resin used in the conductive layer in Example 1 was changed to Polyolefin Resin O-3. Resin O-3 is formed of a repeating structural unit (A1) obtained by copolymerizing ethylene, a repeating structural unit (A2) obtained by copolymerizing maleic anhydride, and a repeating structural unit (A3) obtained by copolymerizing ethyl acrylate, and It has a ratio "(A1) / (A2) / (A3)" of 91.99 / 0.01 / 8.00 (mass%). This electrophotographic photosensitive member was evaluated in the same manner as in Example 1.

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PUM

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Abstract

The present invention relates to an electrophotographic photosensitive member obtained by providing, on a conductive support, a conductive layer containing conductive particles having a volume-average particle diameter of 0.1 [mu]m or more, an intermediate layer, and a photosensitive layer in the stated order in which the conductive layer contains a polyolefin resin containing a specific repeating structural unit at a specific ratio, and a process cartridge and an electrophotographic apparatus each having the electrophotographic photosensitive member.

Description

technical field [0001] The present invention relates to an electrophotographic photosensitive member, a process cartridge, and an electrophotographic apparatus. Background technique [0002] According to the electrophotographic method to which the electrophotographic photosensitive member is applied, the electrophotographic photosensitive member is required to provide photosensitivity, electrical characteristics, optical characteristics, and high-quality images free from image defects, respectively. Representative examples of image defects include image streaks, black spots in white parts, white spots in black parts, and ground fogging in white parts. In addition, when any electrophotographic photosensitive member is exposed to light by using a laser diode of a digital copier or a laser beam printer as a light source, interference fringes that occur due to unevenness in the surface profile of the photosensitive member support or in the thickness of the photosensitive member ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G5/07G03G21/18G03G15/00
CPCG03G5/10G03G5/14G03G5/142G03G5/144G03G5/04G03G15/00G03G15/08
Inventor 高木进司长坂秀昭关户邦彦关谷道代
Owner CANON KK
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