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Electrophotographic photoreceptor, process cartridge, and image forming apparatus

A technology for electrophotography and photoreceptors, applied in the field of process boxes, image forming devices, and electrophotographic photoreceptors, can solve problems such as image defects, and achieve the effect of suppressing the occurrence of white spots and suppressing white spots

Active Publication Date: 2021-10-29
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When an image is formed by an electrophotographic image forming device, an image defect called a white spot phenomenon may occur

Method used

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  • Electrophotographic photoreceptor, process cartridge, and image forming apparatus
  • Electrophotographic photoreceptor, process cartridge, and image forming apparatus
  • Electrophotographic photoreceptor, process cartridge, and image forming apparatus

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0043]

[0044] A first embodiment of the present invention relates to an electrophotographic photoreceptor. Below, refer to Figure 1A ~ Figure 1C , the structure of an electrophotographic photoreceptor (hereinafter, sometimes described as a photoreceptor) will be described. Figure 1A ~ Figure 1C An example of the photoreceptor 1 according to the first embodiment is shown.

[0045] Such as Figure 1A As shown, the photoreceptor 1 includes, for example, a conductive substrate 2 and a photosensitive layer 3 . The photosensitive layer 3 is directly or indirectly disposed on the conductive substrate 2 . For example, the photosensitive layer 3 can be as Figure 1A directly on the conductive substrate 2 as shown. The photoreceptor 1 may further include an intermediate layer. Such as Figure 1B As shown, the intermediate layer 4 can be disposed between the conductive substrate 2 and the photosensitive layer 3 . In addition, if Figure 1A and Figure 1B As shown, the photos...

no. 2 approach

[0141]

[0142] A second embodiment of the present invention relates to an image forming apparatus. An image forming apparatus according to a second embodiment includes an image carrier, a charging unit, an exposure unit, a developing unit, and a transfer unit. The charging unit charges the surface of the image carrier to positive polarity. The exposure unit exposes the charged surface of the image carrier to form an electrostatic latent image on the surface of the image carrier. The developing section develops the electrostatic latent image into a toner image. The transfer unit transfers the toner image from the surface of the image carrier to the recording medium while being in contact with the surface of the image carrier. The image carrier is the photoreceptor according to the first embodiment.

[0143] The image forming apparatus according to the second embodiment can suppress the occurrence of the white spot phenomenon. The reason for this is presumed as follows. ...

no. 3 approach

[0167]

[0168] A third embodiment of the present invention relates to a process cartridge. A process cartridge according to the third embodiment includes the photoreceptor according to the first embodiment.

[0169] Continue to refer to figure 2 , the process cartridge according to the third embodiment will be described. The process cartridge includes a unitized image carrier 1 . The process cartridge has a structure in which at least one selected from the group consisting of the charging unit 42 , the exposure unit 44 , the developing unit 46 and the transfer unit 48 is unitized on the basis of the image carrier 1 . The process cartridges correspond to, for example, the respective image forming units 40a to 40d. The process cartridge may further include a cleaning unit (not shown), a static elimination unit (not shown), or both. The process cartridge is designed to be detachable from the image forming apparatus 100 . Therefore, the process cartridge is easy to handle...

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Abstract

An electrophotographic photoreceptor (1) includes a conductive substrate (2) and a photosensitive layer (3). The photosensitive layer (3) is a single-layer photosensitive layer containing at least a charge generator, an electron transport agent, a hole transport agent, and a binder resin. The electron transport agent contains a naphthoquinone derivative represented by the general formula (1). The triboelectric charge of calcium carbonate when the photosensitive layer (3) is rubbed with calcium carbonate is +7 μC / g or more. In general formula (1), R 11 and R 12 Respectively with the specification of the R 11 and R 12 have the same meaning, and at least one of them is a group substituted with a halogen atom.

Description

technical field [0001] The present invention relates to an electrophotographic photoreceptor, a process cartridge, and an image forming apparatus. Background technique [0002] Electrophotographic photoreceptors are used in electrophotographic image forming devices. As the electrophotographic photoreceptor, for example, a single-layer type electrophotographic photoreceptor or a laminated type electrophotographic photoreceptor is used. The electrophotographic photoreceptor includes a photosensitive layer. The photosensitive layer of the single-layer type electrophotographic photoreceptor is a single-layer type photosensitive layer having a charge generating function and a charge transporting function. The photosensitive layer of the laminated electrophotographic photoreceptor includes a charge generating layer having a charge generating function and a charge transporting layer having a charge transporting function. [0003] When an image is formed by an electrophotographic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G5/06C07C211/54C07D241/36G03G5/05
CPCC07C211/54C07D241/36G03G5/0564G03G5/0596G03G5/0638G03G5/061443G03G5/05G03G5/06
Inventor 清水智文冈田英树
Owner KYOCERA DOCUMENT SOLUTIONS INC