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Electrophotographic photoreceptor, manufacturing method thereof, process cartridge, and image forming apparatus

An electrophotographic and photoreceptor technology, applied in optics, electrographics, instruments, etc., can solve problems such as the decrease in sensitivity of electrophotographic photoreceptors, and achieve the effects of easy characteristic uniformity, image failure suppression, and suppression of charge potential decline.

Inactive Publication Date: 2019-10-18
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case where the electrophotographic photoreceptor is exposed to the gas of oxidizing substances (for example, ozone) or the gas of nitrogen oxides (for example, NOx) and used, and in the case of repeated use, there are The problem that the light sensitivity of the body is easy to drop

Method used

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  • Electrophotographic photoreceptor, manufacturing method thereof, process cartridge, and image forming apparatus
  • Electrophotographic photoreceptor, manufacturing method thereof, process cartridge, and image forming apparatus
  • Electrophotographic photoreceptor, manufacturing method thereof, process cartridge, and image forming apparatus

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no. 1 approach

[0028]

[0029] The first embodiment relates to an electrophotographic photoreceptor (hereinafter, sometimes referred to as “photoreceptor”). Below, refer to figure 1 , the photoreceptor of this embodiment will be described. figure 1 It is a schematic cross-sectional view showing the structure of the electrophotographic photoreceptor according to the first embodiment.

[0030] Photoreceptor 1 includes conductive substrate 2 and photosensitive layer 3 . The photosensitive layer 3 is directly or indirectly disposed on the conductive substrate 2 . The photosensitive layer 3 contains at least a charge generator, a hole transport agent, an electron transport agent, and a binder resin in the same layer.

[0031] The photosensitive layer 3 contains oxytitanium phthalocyanine as a charge generating agent, and this oxytitanium phthalocyanine (hereinafter, sometimes referred to as “Y-type oxytitanium phthalocyanine crystal”) has the following optical and thermal properties.

[003...

no. 2 approach

[0152]

[0153] The second embodiment relates to a method of manufacturing a photoreceptor. Below, refer to figure 1 , the method of manufacturing the photoreceptor according to this embodiment will be described. The method of manufacturing the photoreceptor 1 according to this embodiment includes forming a photosensitive layer. In the formation of the photosensitive layer, a coating liquid (coating liquid for photosensitive layer) is coated on the conductive substrate 2, and at least part of the solvent contained in the coated coating liquid for photosensitive layer is removed, thereby forming a photosensitive layer. layer. The solvent contains, for example, at least tetrahydrofuran or toluene. The coating liquid for a photosensitive layer contains at least a Y-type oxytitanium phthalocyanine crystal, a hole transport agent (1), an electron transport agent, a binder resin, and a solvent. A coating liquid for a photosensitive layer can be prepared by dissolving or disper...

no. 3 approach

[0162]

[0163] The third embodiment relates to an image forming apparatus. Below, refer to Figure 6 , the image forming apparatus according to this embodiment will be described. Figure 6 It is a schematic diagram showing the configuration of the image forming apparatus 6 according to the third embodiment. The image forming apparatus 6 includes the photoreceptor 1 according to the first embodiment.

[0164] The image forming apparatus 6 according to this embodiment includes: an image carrier (corresponding to a photoreceptor) 1, a charging unit (corresponding to a charging device) 27, an exposure unit (corresponding to an exposure device) 28, and a developing unit (corresponding to a developing unit). ) 29 and the transfer section. The charging polarity of the charging portion 27 is positive, and the charging portion 27 positively charges the surface of the image carrier 1 . The exposure unit 28 exposes the charged surface of the image carrier 1 to form an electrostati...

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PUM

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Abstract

The present invention provides an electrophotographic photoreceptor, a manufacturing method thereof, a process cartridge, and an image forming apparatus. The electrophotographic photoreceptor includes a photosensitive layer, and the photosensitive layer contains a charge generating agent and a hole transporting agent in the same layer. The oxytitanium phthalocyanine contained as a charge generating agent has a main peak at the Bragg angle 2θ±0.2°=27.2° in the CuKα characteristic X-ray diffraction spectrum, and in the differential scanning calorimetry spectrum, satisfies the following (B) or (C). (B) There is no peak in the range of 50°C to 400°C except for the peak accompanying the vaporization of adsorbed moisture. (C) There is no peak in the range of 50°C to 270°C except for the peak accompanying the vaporization of adsorbed moisture, and there is a peak in the range of 270°C to 400°C. The hole transport agent is a compound represented by the general formula (1). 【Chemical 1】

Description

technical field [0001] The present invention relates to an electrophotographic photoreceptor, a manufacturing method thereof, a process cartridge, and an image forming apparatus. Background technique [0002] In an electrophotographic image forming apparatus (for example, a printer or an all-in-one machine), an electrophotographic photoreceptor is used as an image carrier. In general, an electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer provided directly or indirectly on the conductive substrate. Among such photosensitive layers, there is a type of photosensitive layer containing a charge generating agent, a charge transporting agent (for example, a hole transporting agent) and a resin (organic material) binding them, and a photoreceptor having such a photosensitive layer is called an electrophotographic Organic photoreceptor. [0003] Also, among the electrophotographic organic photoreceptors, there is a type that contains a hole...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G5/05G03G5/06
CPCG03G5/0517G03G5/0603G03G5/0672G03G5/0696G03G5/061443G03G5/06147G03G5/061473G03G5/047
Inventor 岩下裕子杉本和隆松本贵文
Owner KYOCERA DOCUMENT SOLUTIONS INC