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Positively-charged single-layer electrophotographic photoreceptor and image forming apparatus

An electrophotography, single-layer type technology, applied in the electrical recording process using the charge pattern, the equipment and optics of the electric recording process using the charge pattern, and can solve the problems of easy whitening and lower heat capacity of the support

Active Publication Date: 2014-04-09
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to reduce the weight of the support body, it can be easily realized if its thickness (wall thickness) is reduced. heat of vaporization and easily cools below the dew point, thus more prone to whitening
[0012] Therefore, in the case of using a thinner support, the density, specific heat, and thickness of the solvent used, the support material, and the thickness of the photoreceptor layer to be formed are controlled as in the above-mentioned prior art 5. Methods whose parameters meet certain conditions cannot prevent whitening

Method used

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  • Positively-charged single-layer electrophotographic photoreceptor and image forming apparatus

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no. 1 Embodiment approach

[0024] A first embodiment of the present invention relates to a positively charged single-layer electrophotographic photoreceptor. Such as Figure 1A As shown, the positively charged single-layer electrophotographic photoreceptor 20 of this embodiment includes a photosensitive layer support 11 and a single-layer photosensitive layer 21 formed by using a photosensitive layer coating liquid containing a specific solvent. And formed on the photosensitive layer support 11, it includes a charge generation material, a charge transport material, and a binder resin. Among them, the positively charged single-layer electrophotographic photoreceptor 20 is not particularly limited as long as it includes the photosensitive layer support 11 and the photosensitive layer 21 . Specifically, for example, the photosensitive layer 21 can be directly provided on the photosensitive layer support body 11, or as Figure 1B As shown, an intermediate layer 14 is included between the photosensitive lay...

no. 2 Embodiment approach

[0061] The 2nd embodiment of the present invention relates to an image forming apparatus, which includes: an image carrier; a charging part of a contact charging method, which is used to apply a DC voltage that charges the surface of the image carrier; The surface of the image carrier is exposed to form an electrostatic latent image on the surface of the image carrier; the developing section is used to develop the electrostatic latent image into a toner image; and the transfer section is used to transfer the toner image from the image carrier to the image carrier. On the transfer body; wherein, the image carrier is the positively charged single-layer electrophotographic photoreceptor according to the first embodiment.

[0062] In this embodiment, a known image forming apparatus can be used without particular limitation. Among them, a tandem color image forming apparatus using multi-color toner is preferable, but not limited thereto. More specifically, a color image forming ap...

Embodiment

[0083] The present invention will be described more specifically by way of examples below. In addition, this invention is not limited at all by an Example.

[0084] (Preparation of Photosensitive Layer Coating Liquid)

[0085] 100 parts by mass of bisphenol Z-type polycarbonate resin as a binder resin, and specified amounts of charge transport materials (ie, hole transport materials and / or electron transport materials) shown in Tables 1 to 4 were dissolved in In the minimum amount of tetrahydrofuran (THF) that can dissolve the resin and the charge transport material. A pigment dispersion was also added thereto, and the pigment dispersion was in an amount to 50% of the amount required to dissolve the resin and the charge transport material (that is, the resin and the charge transport material could be dissolved After adding 3 parts by mass of charge generating material (metal-free phthalocyanine) and 0.1 part by mass of leveling agent ("KF-96-50CS" manufactured by Shin-Etsu C...

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Abstract

The invention relates to a positively-charged single-layer electrophotographic photoreceptor and an image forming apparatus. A photosensitive layer containing at least a binding resin and a charge transporting material is provided on a photosensitive layer support base with a wall thickness of 0.7 mm or less, wherein when the charge transporting material is solely constituted by a hole transporting material, a content of the hole transporting material is 110 parts by mass or less with respect to 100 parts by mass of the binding resin, and when the charge transporting material is constituted by a hole transporting material and an electron transporting material, a content of the hole transporting material is 130 parts by mass or less and a content of the electron transporting material is 5 parts by mass or more with respect to 100 parts by mass of the binding resin, and a sum total of the hole transporting material and the electron transporting material is 140 parts by mass or less. Therefore, a support with thin wall is provided with a photosensitive layer without blushing.

Description

technical field [0001] The present invention relates to a positively charged single-layer electrophotographic photoreceptor and an image forming apparatus having the positively charged single-layer electrophotographic photoreceptor as an image carrier. Background technique [0002] Conventionally, an organic photoreceptor (OPC) has been widely adopted as a photoreceptor of an electrophotographic device. The organic photoreceptor is roughly classified into: a single-layer organic photoreceptor formed on a tube base such as aluminum by dispersing a charge generating material (CGM) and a charge transport material (CTM) in a binder. resin; and a laminated organic photoreceptor in which a layer containing CGM and a layer containing CTM are laminated on a tube blank. [0003] Among organic photoreceptors, a single-layer type organic photoreceptor is excellent in production efficiency because of its simple layer structure. In addition, when the single-layer organic photoreceptor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G5/04G03G15/00
CPCG03G5/047G03G5/0614G03G5/043G03G5/0609G03G5/061443G03G5/061473
Inventor 水田泰史浜崎一也木元惠三
Owner KYOCERA DOCUMENT SOLUTIONS INC
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