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Single-layer type electrophototgraphic photoreceptor and image forming device

An electrophotographic and photoreceptor technology, which is applied to the electric recording process applying charge pattern, the equipment of the electric recording process applying charge pattern, optics, etc. It is difficult to stably obtain initial sensitivity and other problems, and achieve the effect of suppressing the generation of black spots, maintaining sensitivity characteristics, and excellent sensitivity characteristics

Active Publication Date: 2012-12-05
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] However, although the single-layer electrophotographic photoreceptor disclosed in Patent Document 1 successfully suppresses changes in sensitivity characteristics before and after continuous printing on a large amount of paper in a low-temperature and low-humidity environment, that is, durable printing, the titanium oxide The weight ratio of the organosilicon compound in the microparticles is too large, and there is a problem that the initial sensitivity characteristic itself is not sufficient
[0017] In addition, in the electrophotographic photoreceptor disclosed in Patent Document 2, not only the particle diameter of the titanium oxide fine particles is too large, but also the weight ratio of the organosilicon compound in the titanium oxide fine particles is too large, making it difficult to stably obtain sufficient initial sensitivity. question

Method used

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  • Single-layer type electrophototgraphic photoreceptor and image forming device
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  • Single-layer type electrophototgraphic photoreceptor and image forming device

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no. 1 approach

[0052] A first embodiment provides a single-layer electrophotographic photoreceptor having a substrate, a photosensitive layer disposed on the substrate, and an intermediate layer disposed between the substrate and the photosensitive layer, characterized in that the intermediate layer contains a binder resin and titanium oxide Titanium oxide fine particles have the following characteristics (a) to (c) in addition to fine particles, so that the above-mentioned problems can be solved.

[0053] (a) The number-average primary particle diameter of the titanium oxide fine particles is within the range of 5 to 30 nm.

[0054] (b) Titanium oxide particles are surface-treated with alumina, silica, and organosilicon compounds.

[0055] (c) The weight ratio X (% by weight) of the organosilicon compound on the surface of the titanium oxide fine particles satisfies the following relational expression (1).

[0056] 1(weight%)≤X<4(weight%)(1)

[0057] Each constituent element of the single...

no. 2 approach

[0232] Such as Figure 4 As shown, the second embodiment of the present invention is an image forming apparatus 100 having the figure 1 At the same time as the single-layer electrophotographic photoreceptor 10, a charging unit 112, an exposure unit 113, a developing unit 114, a transfer unit 115, a cleaning unit 117, and a static elimination unit 102 are arranged around the single-layer electrophotographic photoreceptor 10. .

[0233] Hereinafter, the content already described in the first embodiment will be omitted, and the second embodiment will be described focusing on parts different from those described in the first embodiment.

[0234] use Figure 4 The basic configuration and operation of image forming apparatus 100 will be described.

[0235] First, after the single-layer electrophotographic photoreceptor 10 of the image forming apparatus 100 is rotated at a predetermined processing speed (peripheral speed) in the direction indicated by the arrow A, its surface is c...

Embodiment 1

[0258] 1. Surface treatment of titanium oxide particles

[0259] 100 parts by weight of titanium oxide microparticles (manufactured by TAYCA Co., Ltd., MT-05, number average primary particle diameter: 10 nm) surface-treated with silica and alumina, and 1 weight part of methylhydropolysiloxane (MHPS) 100 parts by weight and 100 parts by weight of toluene were dissolved in a container to obtain a suspension. Then, the obtained suspension was stirred for 20 minutes using a stirrer to obtain a slurry of titanium oxide fine particles. Next, after kneading the obtained slurry of titanium oxide fine particles using a kneader, the solvent was removed by heating under reduced pressure to obtain surface-treated titanium oxide fine particles (before heat treatment). Then, the obtained titanium oxide fine particles (before heat treatment) were cured (heat treated) at 150° C. to obtain surface-treated titanium oxide fine particles.

[0260] Furthermore, the number average primary particl...

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Abstract

The invention provides a single-layer type electrophototgraphic photoreceptor capable of effectively preventing the generation of a dark spot in the high temperature and high humidity environment and effectively holding excellent photosensitivity characteristic in the low temperature and low humidity environment, as well as an image forming device. The single-layer type electrophototgraphic photoreceptor has a body, a photosensitive layer arranged on the body and an intermediate layer between the body and the photosensitive layer, characterized in that the intermediate layer contains a bonding resin and titanium oxide particles, and the titanium oxide particles have the following characteristics: (a) the number average primary particle size of the titanium oxide particles is in the range of 5 to 30 nm, (b) the surface treatment of the titanium oxide particles is performed by using aluminum oxide, silica and an organo-silicon compound, (c) the weight ratio X (weight%) of the organo-silicon compound on the surface of the titanium oxide particles meets the relation (1): 1 (weight%) <=X<4 (weight%).

Description

technical field [0001] The present invention relates to a single-layer type electrophotographic photoreceptor and an image forming device. In particular, it relates to a single-layer electrophotographic photoreceptor capable of effectively suppressing the generation of black spots in a high-temperature and high-humidity environment, and effectively maintaining excellent sensitivity characteristics even in a low-temperature and low-humidity environment, and using such a single-layer electrophotographic photoreceptor. An image forming apparatus for a layered electrophotographic photoreceptor. Background technique [0002] In recent years, organic photoreceptors using organic substances have been widely used as electrophotographic photoreceptors used in image forming apparatuses using electrophotography, such as copiers and laser printers, due to demands for low cost and low environmental pollution. [0003] Such organic photoreceptors include a laminated electrophotographic p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G5/14G03G5/04G03G15/00
Inventor 岩下裕子滨崎一也丸尾敬司
Owner KYOCERA DOCUMENT SOLUTIONS INC