JPS5830764A - Electrophotographic receptor - Google Patents

Abstract

PURPOSE:To obtain a photoreceptor superior in adhesion between a substrate and a photoconductive layer, and resistance to scratch, by forming a photoconductive layer on the substrate obtained by dispersing carbon into a thermosetting phenol resin having electric resistance not above a specified value on the surface layer. CONSTITUTION:A photoconductive layer containing CdS or the like is formed on a conductive substrate obtained by dispersing carbon into a curable type phenol resin so as to control the electric resistance of the surface layer to <=5X10<5>OMEGA, and on this layer a heat-shrinkable polyester insulating layer is formed to make up a cylinder type photoreceptor. Alternatively, a liquid dispersion of a photocurable resin, butyral, and polytetrafluoroethylene is coated on said conductive substrate, and hardened with UV rays to form a recording material, thus permitting these photoreceptor and recording material to have resistance to rust and scratch contrary to the conventional conductive substrate having a metallic surface made of aluminum, and high adhesion between the substrate and the photoconductive layer or the recording layer, and high durability, and to be produced at low cost, and to form a good image.

Description

Detailed Description of the Invention Zero-Mei is related to supports used in electrophotographic photoreceptors, and 411 is an inexpensive support with improved scratch resistance.
It is to offer m.

Conventionally, an electrophotographic photoreceptor is produced by forming a conductive insulating material on a conductive substrate by vapor deposition or coating to form a photoconductive layer, and then adding an insulating layer (tEI) as required. I was captured and captured.

Usually, metals such as iron, stainless steel, copper, aluminum, and tin, as well as paper and resin film surfaces, are used as supports for electrophotographic photosensitive materials, but they are particularly lightweight.

The current situation is that aluminum is the mainstream in terms of workability, non-pollution, etc., but it also has disadvantages in terms of cost and the possibility of surface scratches due to handling. .

However, as shown in the table, the conditions generally required for a support for an electrophotographic photoreceptor include surface smoothness, electrical resistance, adhesion to the photoconductive layer, and solvent resistance.

The present invention satisfies all of these conditions and provides a support for scratches on # (and rust K < I, -i), and is easy to reuse and handle b%. Electrophotography, characterized in that the surface of the support is formed of a layer of at-curable 78-nol resin dispersed with carno, and that the surface layer has an electrical resistance of 8 x 1 G Ω or less. It is a photoreceptor.

In the present invention, the reason why the resistance value is set to t-5×10 Ω or less is 1. If the resistance value is higher than this, it is impossible to form a clear solid-liquid. Therefore, the present invention is described below. truth 31
A detailed explanation will be given based on one example.

Example! A 80φxsso■ heat-curing, 74-norm resin cylinder (Kahne Co., Ltd.), a dispersion photoconductive layer (cdII/#L-vinyl vinegar Vinyl (UMCH, U
CC) ) was formed by a dipping method. A heat-shrinkable polyester film (Icall Inc.) is further applied on the photoconductive layer.
A photoreceptor was obtained by distilling the photoreceptor with boiling water at 90°C. A latent image was formed on the photoreceptor by subsequent charging, secondary AC simultaneous image exposure, and full V irradiation, and then development and transfer cleaning were carried out. A good image was obtained even when the photoreceptor was loaded, and no abnormality was observed in mechanical adhesion.For comparison with this photoreceptor, MuL was used as a support, but the image and durability were not as good as described above. It was about the same level as the photoreceptor. The use of At as a support and cardan-containing 78-nol resin was advantageous in that it reduced the cost by about half.

In addition, B@- was attached to the support used in Example 1F11 with a photoconductive layer.
To is formed by a vapor deposition method, a latent image is formed by electrification and image exposure, and then development, transfer, and printing are performed using an electrophotographic method (p-return), which lasts 60,000 copies. However, no abnormality was observed and the image quality was good.mx A photocurable acrylic urethane resin was formed by a dipping method on the same support and photoconductive layer as used in Examples. The obtained photoreceptor was subjected to durability testing using the same electrophotographic method as in Example 1, but no abnormality was observed even after 60,000 copies, and the WJ image quality was good.

Example 2 Cargane-containing phenolic resin (exelite,
Tokai Rubber Industries, Ltd., 5 x 10' Ω) was used, and after applying a solution containing 100 parts of photocuring resin, 1.5 parts of tutilal, and lysost-dispersed on the surface of the material, by dipping method, and applying ultraviolet rays. The material was cured to form a 30 μm shape, and a recording medium was prepared.

This is an electrophotographic method in which a secondary latent image is formed on the recording medium using a corona ion stream, and then development, transfer, and cleaning are repeated repeatedly. Durability test was carried out, but mechanical fishing gear! was not observed, and the image was good.

Claims (1)

[Claims] L An electrophotographic photoreceptor K that forms an electrostatic image or a toner image
The support is cured by scratching ■ A surface layer is formed by dispersing car fy mainly in phenolic resin and forming a surface layer with J katsuso oa.
An electrophotographic photoreceptor characterized in that the r layer has an electrical resistance of 11c5×10 Ω or less. The electrophotographic photoreceptor according to claim 01111, wherein the L sat layer is a heat-applied laI polyester film.