Electrophotographic photosensitive body, image forming device, and electrophotographic cartridge

A technology of electrophotography and photoreceptor, applied in optics, electrography, instruments, etc., to achieve the effects of low residual potential, high-quality images, and high sensitivity

Inactive Publication Date: 2009-06-03
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even if a hole-transporting agent having an arylamine skeleton is used, it may not be able to fully satisfy the requirements due to the increase in the speed of imaging devices and the improvement in image quality requirements in recent years.

Method used

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  • Electrophotographic photosensitive body, image forming device, and electrophotographic cartridge
  • Electrophotographic photosensitive body, image forming device, and electrophotographic cartridge
  • Electrophotographic photosensitive body, image forming device, and electrophotographic cartridge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0484] [Coating solution for undercoat layer]

[0485] Using a Henschel mixer, rutile-type titanium dioxide having an average primary particle diameter of 40 nm ("TTO55N" manufactured by Ishihara Sangyo Co., Ltd.) and 3% by weight of methyldimethoxysilane (Toshiba Silicone) were mixed with respect to the titanium dioxide. company "TSL8117") to obtain surface-treated titanium dioxide, 50 parts of the obtained surface-treated titanium dioxide and 120 parts of methanol were mixed to obtain a raw material slurry, and zirconia beads with a diameter of about 100 μm (YTZ manufactured by NIKKATO Co., Ltd. ) as the dispersion medium, using the ULTRAAPEX MILL (UAM-015 type) manufactured by Shou Kogyo Co., Ltd. with a mill volume of about 0.15L, under the state of liquid circulation at the rotor peripheral speed of 10 m / s and the liquid flow rate of 10 kg / hour, 1 kg of the The raw material slurry was dispersed for 1 hour to prepare a titanium dioxide dispersion.

[0486] Heat the above-...

Embodiment 2

[0503] A photoreceptor E2 was obtained in the same manner as in Example 1 except that the following compound (CT-2) was used instead of the above-mentioned compound (CT-1) as the charge-transporting substance.

[0504]

Embodiment 3

[0506] Photoreceptor E3 was obtained in the same manner as in Example 1 except that the following compound (CT-3) was used instead of the above-mentioned compound (CT-1) as the charge-transporting substance.

[0507]

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PUM

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Abstract

The present invention discloses an electrophotographic photosensitive body with excellent electrical characteristics, which enables to obtain a high-quality image wherein occurrence of ghost phenomenon is suppressed. Specifically disclosed is an electrophotographic photosensitive body comprising, on a conductive supporting body, a foundation layer containing metal oxide particles and a binder resin and a photosensitive layer formed on the foundation layer. In this electrophotographic photosensitive body, the metal oxide particles dispersed in a solvent obtained by mixing methanol and 1-propanol at a weight ratio of 7:3 have a volume average particle diameterof not more than 0.1 [mu]m and a cumulative 90% particle diameter of not more than 0.3 [mu]m, as measured by dynamic light scattering; and a compound represented by the formula (I) below is contained in the photosensitive layer. In the formula (I), Ar<1>-Ar<6> independently represent an optionally substituted aromatic residue; X represents an optionally substituted organic residue; and n1 and n2 independently represent an integer of 0-2.

Description

technical field [0001] The present invention relates to an electrophotographic photoreceptor having an undercoat layer, and an image forming device and an electrophotographic cartridge using the electrophotographic photoreceptor. Background technique [0002] Since electrophotographic technology can obtain immediacy, high-quality images, etc., this technology has been widely used not only in the field of copiers but also in various printer fields in recent years. For the electrophotographic photoreceptor (hereinafter referred to simply as "photoreceptor" for convenience), which is the core of electrophotography technology, organic photoreceptors using organic photoconductive materials are being developed. Compared with photoconductive materials, organic photoconductive materials have the advantages of being pollution-free and easy to manufacture. [0003] Generally, an organic photoreceptor is formed by forming a photosensitive layer on a conductive support. As the type of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G5/06G03G5/14
CPCG03G5/104G03G5/0614G03G5/0525G03G5/144G03G5/06144G03G5/061446G03G5/061473G03G5/06142
Inventor 三森光幸石尾耕三渕上宏惠
Owner MITSUBISHI CHEM CORP
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