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Electrophotographic photosensitive body, image forming device, and electrophotographic cartridge

A technology of electrophotography and photoreceptor, which is applied in the fields of optics, electrical recording, instruments, etc. It can solve the problem of high doping amount of photoconductive substances and achieve high sensitivity

Inactive Publication Date: 2009-05-27
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the doping amount of the photoconductive substance is quite large, it has not been achieved to make the photosensitive layer have sufficient mechanical strength.

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
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Effect test

Embodiment 1-1

[0882] [Coating solution for undercoat layer]

[0883] Rutile titanium dioxide (manufactured by Ishihara Sangyo Co., Ltd., "TTO55N") with an average primary particle diameter of 40 nm and methyldimethoxysilane (manufactured by Toshiba Silicone Co., Ltd. " TSL8117") were mixed to obtain surface-treated titanium dioxide, 50 parts of the surface-treated titanium dioxide and 120 parts of methanol were mixed to form a raw material slurry, and zirconia beads (manufactured by NIKKATO CORPORATION, YTZ) with a diameter of about 100 μm were used as the dispersion medium, using a grinder The ULTRA APEXMILL (UAM-015 type) manufactured by Kotobuki Industrial Co., Ltd. with a volume of about 0.15L was used to disperse 1 kg of the raw material slurry for 1 hour in a liquid circulation state with a rotor peripheral speed of 10 m / s and a liquid flow rate of 10 kg / hour. A titanium dioxide dispersion was produced.

[0884]Under heating, the mixed solvent of the above-mentioned titanium dioxide ...

Embodiment 1-2

[0901] As the binder resin, the following compound was used instead of compound (P-1) (compound (P-2): viscosity average molecular weight about 40,000; polymerized according to the method described in Example 3 of Japanese Patent Application No. 2002-3828) , except that, it carried out similarly to Example 1-1, and obtained the photoreceptor 1-E2.

[0902]

Embodiment 1-3

[0904] As the binder resin, instead of compound (P-1), use the following compound (compound (P-3): viscosity-average molecular weight about 30,000; m:n=3:7; in accordance with Japanese Patent Application No. 2002-3828 (polymerization by the method described in Example 4), it carried out similarly to Example 1-1, and obtained the photoreceptor 1-E3.

[0905]

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Abstract

An electrophotographic photoreceptor having high sensitivity and hardly affected by the transfer in an electrophotographic process is provided. The electrophotographic photoreceptor includes an undercoat layer containing metal oxide particles and a binder resin and a photosensitive layer disposed on the undercoat layer, wherein the metal oxide particles have a volume average particle diameter of 0.1 [mu]m or less and a 90% cumulative particle diameter of 0.3 [mu]m or less which are measured by a dynamic light-scattering method in a liquid of the undercoat layer dispersed in a solvent mixture of methanol and 1-propanol at a weight ratio of 7:3, and the photosensitive layer contains a binder resin having an ester bond.

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 as "photoreceptor" as appropriate), which is the core of electrophotography technology, an organic photoreceptor using an organic photoconductive material is being developed as its photoconductive material, which is comparable to an inorganic photoconductive material. Compared with organic photoconductive materials, they have the advantages of being pollution-free and easy to manufacture. [0003] Generally, an organic photoreceptor is formed by for...

Claims

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Application Information

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IPC IPC(8): G03G5/14G03G5/05G03G5/06
Inventor 三森光幸石尾耕三渕上宏惠高村宽昭河合保典
Owner MITSUBISHI CHEM CORP
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