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Electrophotographic photoreceptor, process cartridge and image forming apparatus

a photoreceptor and process cartridge technology, applied in the direction of electrographic process apparatus, instruments, optics, etc., can solve the problem of insufficient investigation from the viewpoint of improving film formation properties

Active Publication Date: 2011-10-25
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0031]For the reasons as described above, it is thought that in the electrophotographic photoreceptor in the present exemplary embodiment, an outermost layer is formed on the photosensitive layer with smaller variation in its composition in a thickness direction, and with fewer defects, and thereby a photosensitive layer superior in strength and environment stability and capable of forming images of favorable quality for an extended period of time is obtained.

Problems solved by technology

However, there has been insufficient investigation from the viewpoint of improving film formation properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0247]A cylindrical aluminum support is prepared as a conductive support.

[0248]Next, 100 parts by weight of zinc oxide (trade name: SMZ-17N, manufactured by Tayca corporation) is mixed with 500 parts by weight of toluene and stirred, then 2 parts by weight of a silane coupling agent (trade name: A1100, manufactured by Nippon Unicar Company Limited) is added and stirred for five hours. Thereafter, the toluene is distilled off by vacuum distillation and baking is performed at 120° C. for two hours. The obtained surface-treated zinc oxide is analyzed by fluorescence X-rays, and the result is that the ratio of Si element intensity to zinc element intensity is 1.8×10−4.

[0249]35 parts by weight of the above surface-treated zinc oxide is mixed with 15 parts by weight of a curing agent (trade name: SUMIJULE 3175, blocked isocyanate, manufactured by Sumitomo Bayer Urethane Co., Ltd.), 6 parts by weight of a butyral resin (trade name: S-LEC BM-1, manufactured by Sekisui Chemical Co., Ltd.), a...

example 2

[0256]The support, undercoat layer, charge generating layer, and charge transporting layer are prepared in the same manner as described in Example 1.

[0257]Subsequently, the protective layer forming solution is obtained in the same manner as in Example 1 except that a fluorine atom-containing polyoxyethylene ether (trade name: FUTARGENT 251, manufactured by Neos Company Limited) is used in place of the fluorine atom-containing sodium sulfonate (trade name: FUTARGENT 100C. manufactured by Neos Company limited). Thereafter, a protective layer of 6 μm thick is formed in the same manner as in Example 1 to obtain an electrophotographic photoreceptor (hereinafter, referred to as Photoreceptor-2).

[0258]The same procedures as above are repeated ten times to obtain ten samples of Photoreceptor-2, and the surface conditions of the protective layers of the photoreceptors are visually observed. The film defect ratio is shown in Table 1.

example 3

[0259]The support, undercoat layer, charge generating layer, and charge transporting layer are prepared in the same manner as described in Example 1.

[0260]Subsequently, the protective layer forming solution is obtained in the same manner as in Example 1 except that a fluorine atom-containing betaine structure compound (trade name: FUTARGENT 400SW, manufactured by Neos Company Limited) is used in place of the fluorine atom-containing sodium sulfonate (trade name: FUTARGENT 100C, manufactured by Neos Company Limited). Thereafter, a protective layer of 6 μm thick is formed in the same manner as in Example 1 to obtain an electrophotographic photoreceptor (hereinafter, referred to as Photoreceptor-3).

[0261]The same procedures as above are repeated ten times to obtain ten samples of Photoreceptor-3, and the surface conditions of the protective layers of the photoreceptors are visually observed. The film defect ratio is shown in Table 1.

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Abstract

An electrophotographic photoreceptor comprising a conductive support and a photosensitive layer provided on or above the conductive support, the photosensitive layer having an outermost layer comprising a cured product of a composition comprising a curable resin, a surfactant containing a fluorine atom, and a charge transporting organic compound having a specific structure.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application is based on and claims priority under 35 USC 119 from Japanese Patent Application No. 2007-102101 filed Apr. 9, 2007.BACKGROUND[0002]1. Field of the Invention[0003]The invention is related to an electrophotographic photoreceptor, a process cartridge, and an image forming apparatus.[0004]2. Description of the Related Art[0005]Xerographic image forming apparatuses are equipped with an electrophotographic photoreceptor (hereinafter, sometimes simply referred to as “a photoreceptor”), a charging unit, an exposure unit, a developing unit, and a transferring unit, and form images by an electrophotographic process using these units.[0006]Xerographic image forming apparatuses have increased in speed and have extended operating lifes due to technological developments in each member and in the system as a whole. Along with such changes, there are increasing requirements for each subsystem to be able to cope with high speeds and prov...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G03G5/00
Inventor YAMADA, WATARUNUKADA, KATSUMI
Owner FUJIFILM BUSINESS INNOVATION CORP