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Electrophotographic photoconductor and manufacturing method of electrophotographic photoconductor

An electrophotographic and photoreceptor technology, applied in optics, electrographics, instruments, etc., can solve problems such as insufficient adhesion of photoreceptor layers, black spots in images, and reduced chargeability of photoreceptors.

Active Publication Date: 2009-09-02
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) In the charging process, with the application of either positive or negative charges to the photoreceptor, charges of opposite polarity are generated on the support substrate, but when there is no intermediate layer, the generated charges are injected into the photoreceptor layer In this case, the chargeability of the photoreceptor decreases
[0004] (2) When the photoreceptor layer is directly coated on the support substrate, the photoreceptor layer may not be sufficiently bonded to the support substrate depending on the type of binder resin or coating conditions.
[0005] (3) When there are defects such as damage on the surface of the supporting substrate, it is easy to produce black spots on the image

Method used

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  • Electrophotographic photoconductor and manufacturing method of electrophotographic photoconductor
  • Electrophotographic photoconductor and manufacturing method of electrophotographic photoconductor
  • Electrophotographic photoconductor and manufacturing method of electrophotographic photoconductor

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Embodiment approach

[0200] A second embodiment of the present invention is a method for producing an electrophotographic photoreceptor, which is a method for producing an electrophotographic photoreceptor having a support substrate, an intermediate layer, and a photoreceptor layer, comprising: oxidizing Titanium is dispersed in a binder resin solution containing a binder resin and an organic solvent, a process of producing a coating liquid for an intermediate layer for forming the above-mentioned intermediate layer, and forming an intermediate layer using the coating liquid for an intermediate layer In the process, the value of ΔL in the intermediate layer satisfies the following relational expression (1), or the value of ΔA in the intermediate layer satisfies the following relational expression (2),

[0201] -5.0≤ΔL≤0 (1)

[0202] ΔA≤0.055 (2)

[0203] ΔL value: the difference obtained by subtracting the L value of the support substrate measured separately from the L value measured with the int...

Embodiment 1

[0273] 1. Fabrication of a laminated electrophotographic photoreceptor

[0274] (1) Formation of the middle layer

[0275] After filtering the coating solution A for the intermediate layer obtained in Example 1 with a filter of 5 microns, one end of the aluminum substrate (supporting substrate) with a diameter of 30 mm and a length of 238.5 mm faces up, and the obtained intermediate layer Dip coating in the coating solution at a speed of 5mm / sec. Then, curing treatment was performed at 130° C. for 30 minutes to form an intermediate layer with a film thickness of 2 μm.

[0276] (2) Formation of photoreceptor layer

[0277] Next, 1 part by weight of titanium phthalocyanine produced in the following procedure as a charge generating agent, 1 part by weight of polyvinyl acetal (Sekisui Chemical Industry, S-LECKS-5) as a binder resin, and 1 part by weight of a dispersion 60 parts by weight of propylene glycol monomethyl ether and 20 parts by weight of tetrahydrofuran in the mediu...

Embodiment 2～7 and comparative example 1～3

[0338] In Examples 2 to 7 and Comparative Examples 1 to 3, except when forming the intermediate layer in the laminated electrophotographic photoreceptor, as shown in Table 3, coating solutions B to J for the intermediate layer were used as A laminated electrophotographic photoreceptor was produced and evaluated in the same manner as in Example 1 except for the coating liquid used for the intermediate layer. The obtained results are shown in Table 3.

[0339] [table 3]

[0340] table 3

[0341]

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PUM

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Abstract

The present invention provides an electrophotographic photoreceptor that rarely causes image blurring under high temperature and high humidity and is easy to manufacture, and a method for manufacturing such an electrophotographic photoreceptor. The electrophotographic photoreceptor has a support substrate, an intermediate layer, and a photoreceptor layer, wherein the intermediate layer contains titanium oxide and a binder resin, and at the same time, the value of ΔL in the intermediate layer satisfies -5.0≤ΔL≤0, or the intermediate layer The ΔA value in satisfies ΔA≤0.055, wherein, ΔL value: the L value (based on the JIS Z 8722 standard, the parameter value measured with a color difference meter) measured with the state in which the intermediate layer is formed on the support substrate minus the value of the support substrate measured separately The difference obtained by the L value; ΔA value: the difference obtained by subtracting the reflection absorbance measured by the support substrate alone from the reflection absorbance (parameter value measured with a color difference meter) measured in the state where the intermediate layer is formed on the support substrate.

Description

technical field [0001] The present invention relates to an electrophotographic photoreceptor and a method for manufacturing the electrophotographic photoreceptor. In particular, it relates to a high-image-quality electrophotographic photoreceptor used in image forming apparatuses such as printers, copiers, and facsimile devices, and a method for manufacturing such an electrophotographic photoreceptor. Background technique [0002] In an electrophotographic photoreceptor included in an image forming apparatus, a so-called electrophotographic photoreceptor composed of a charge generating agent that generates charges by light, a charge transport agent that transports the generated charges, and a binder resin constituting a layer in which these substances are dispersed is widely used. of organic photoreceptors. However, in the organic photoreceptor, the following problems have been found. [0003] (1) In the charging process, with the application of positive or negative charge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G5/04G03G5/05
Inventor 大坪淳一郎东润丸尾敬司稻垣义雄中井规郎浜崎一也大河志穗
Owner KYOCERA DOCUMENT SOLUTIONS INC