Photoelectric sensitive material

An electro-optical and photosensitive layer technology, applied in the field of electro-photosensitive materials, can solve problems such as inability to achieve

Inactive Publication Date: 2008-09-24
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the effect of reducing the thickness difference to ensure a constant film thickness cannot be achieved

Method used

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  • Photoelectric sensitive material
  • Photoelectric sensitive material
  • Photoelectric sensitive material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0144] The present invention will be described below with reference to Examples and Comparative Examples.

[0145] form the middle layer

[0146] The ball mill was operated for 24 hours to mix and disperse the following components and zirconia beads having a diameter of 1 mm, thereby preparing a coating solution for the intermediate layer.

[0147] * Binder resin: 60 parts by weight of phenol resin (TD447 available from Dainipon Ink & Chemicals Inc.)

[0148] * Charge transfer material: 20 parts by weight of a compound represented by general formula ET-1 (MW: 425)

[0149] * Dispersion medium: 100 parts by weight of methanol

[0150] The 30 mm diameter aluminum tube is held by a positioner which holds the aluminum tube in a form around its interior and places the aluminum tube above the surface of the liquid on which the solution is applied with its axis perpendicular to the liquid surface.

[0151] The positioner was lowered at a speed of 5 mm / sec to immerse the entiret...

Embodiment 2～8

[0171] Each of the electrophotosensitive materials of Examples 2 to 8 was produced in the same manner as in Example 1, except that the same amount of the compound listed in Table 1 was used instead of the compound of the general formula (ET-1) as the charge transfer material.

[0172] Table 1

[0173]

[0174] In the tables and figures the term "charge transfer material" is abbreviated as "C.T.M."

Embodiment 9～11 and comparative example 14～17

[0202] The coating solutions for each intermediate layer in Examples 9 to 11 and Comparative Examples 14 to 17 were prepared in the same manner as in Examples 2, 4, 8 and Comparative Examples 1, 5, 10, and 13, except that The phenol resin (TD447) used as the binder resin was replaced by the same amount of phenol resin (J325 available from Dainippon Ink & Chemicals Inc.).

[0203] Each of the intermediate layers of Examples and Comparative Examples was then produced in the same manner as in Example 1, except that the positioner was lifted at a speed of 4 mm / sec to take out the tube from the coating solution. An intermediate layer having an average thickness of 4.5 μm was thus obtained.

[0204] The thickness difference ΔT (μm) of the intermediate layers of the Examples and Comparative Examples was measured in the same manner as described above. The results are listed in Table 4. figure 2 The relationship between the molecular weight of the charge transport material and the i...

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Abstract

The invention relates to an electrophotosensitive material featuring an intermediate layer interposed between a conductive substrate and a photosensitive layer and containing a binder resin and a charge transport material having a molecular weight of 400 or more. The intermediate layer has a constant thickness because the intermediate layer can be formed by, for example, dip coating a coating solution containing the above two components on the conductive substrate without suffering much flow-down of the coating solution. Hence, overlaying the photosensitive layer on the intermediate layer provides an electrophotosensitive material capable of offering favorable, fog-free images.

Description

technical field [0001] The invention relates to an electrophotosensitive material comprising an electrically conductive substrate, a photosensitive layer and an interposed intermediate layer (undercoat layer). Background of the invention [0002] As an electrophotosensitive material for image forming equipment such as xerographic copiers, plain paper facsimile machines, laser printers, and composite machines combining these functions, a so-called organic electrophotosensitive material is widely used, which includes the following Combination of components: [0003] * Charge generating materials that generate charges (holes and electrons) when exposed to light; [0004] * a charge transfer material that transports the generated charge; and [0005] * Adhesive resin. [0006] Charge transfer materials are divided into two categories, including hole transfer materials for transferring charge holes, and electron transfer materials for transferring electrons. [0007] An ad...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G03G5/14G03G5/06
CPCG03G5/142G03G5/0637G03G5/144G03G5/0609G03G5/0605G03G5/0616G03G5/0672G03G5/0614G03G5/0607G03G5/0612G03G5/06144G03G5/061443G03G5/06145G03G5/06147G03G5/061473G03G5/06149
Inventor内田真纪冈田英树
OwnerKYOCERA DOCUMENT SOLUTIONS INC