JPH021299B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for manufacturing an electrophotographic photoreceptor in which a photosensitive layer made of a selenium-based photoconductive material is formed on a conductive substrate. This type of photoreceptor can be used in a copier, printer, etc. to form a latent image by charging and exposure, then developing and transferring to form an image on the paper surface, and finally remove the charge remaining on the surface and use it for image formation. A series of processes are performed to clean the remaining toner. Conventionally, it has been believed that electrophotographic photoreceptors must have a smooth surface of the photosensitive layer from the viewpoint of image formation and reliability. However, if the surface of the photosensitive layer is too smooth, there are the following drawbacks. (1) The frictional force between the cleaning blade and the photoreceptor increases, causing scratches on the surface of the photoreceptor layer that cause image defects such as white streaks on the image. (2) The adhesion between the toner and the photoconductor increases, resulting in poor NATO transferability and cleaning performance. (3) The adhesion to the transfer paper increases and the separation of the paper deteriorates. It has recently been found that in order to eliminate such defects, it is better for the surface of the photosensitive layer to be rough to some extent. However, in the currently widely used photoreceptors, a pure Se alloy is used as the photoconductive material of the photosensitive layer, and an amorphous Se-based material is deposited on the conductive substrate by a vacuum evaporation method or the like. The surface of such a Se-based photosensitive layer crystallizes when foreign matter comes into contact with it, and any processing marks such as streaks would appear on the image, so surface processing could not be considered. SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing a photoreceptor in which the surface of the photoreceptor layer can be roughened to an appropriate roughness without impairing the photoconductive properties of the photoreceptor layer. The purpose of this is to apply a photosensitive layer made of a selenium-arsenic alloy onto a conductive substrate, and then roughen the surface of this photosensitive layer to a surface roughness of 0.1 to 1.0 μm using a liquid honing method. This is achieved by Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a photosensitive layer 2 made of selenium or a selenium alloy is deposited on a conductive substrate 1, for example an aluminum cylinder, in a conventional manner. Next, as shown in FIG. 2, the aluminum cylinder 11 coated with such a photosensitive layer is placed on a rotary table 12, and as it is rotated, fine abrasive grains are injected from a nozzle 14 that reciprocates in the axial direction indicated by an arrow 13. A liquid jet 15 containing
A rough surface 3, which is shown exaggerated in the figure, is obtained. Table 1 shows processing conditions, surface roughness, image quality, and cleanability when the surface of a photosensitive layer using Se-As alloy as a photoconductive material was roughened. In the table, ○ indicates good quality, △ indicates slightly poor quality, and × indicates unusable.

[Table] According to the liquid honing method, the surface of the photosensitive layer has a satin-like irregular roughness, and there are no processing marks in the image with a roughness in the range of 0.1 to 3.0 μm, and there are no image defects such as white streaks. The condition was good with no outbreaks. However, if the surface roughness is 4 μm or more, toner will enter the surface recesses, resulting in poor cleaning. In addition, point-like charging unevenness occurs, resulting in image defects. Therefore, the surface roughness obtained by liquid honing is preferably within a range of not exceeding 40 μm, and particularly within the range of 0.1 to 1.0 μm. As described above, in the present invention, the surface of the mirror-like photosensitive layer formed on the substrate is appropriately roughened by the liquid honing method, so delicate settings such as the surface roughness of the conductive substrate and the deposition conditions are required. Since the conventional photosensitive layer formation method can be applied, it is possible to easily obtain electrophotographic photoreceptors with good toner transfer properties, paper separation properties, and cleaning properties, and this effect is particularly great for selenium arsenide photoreceptors. big.

[Brief explanation of drawings]

FIG. 1 is a conceptual partial cross-sectional view of a photoreceptor according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing an example of an apparatus for carrying out the present invention. DESCRIPTION OF SYMBOLS 1... Conductive substrate, 2... Photosensitive layer, 3... Rough surface, 11
...aluminum cylinder, 14... nozzle, 15... liquid jet containing abrasive grains.

Claims (1)

[Claims] 1. A photoreceptor for electrophotography, characterized in that a photoreceptor layer made of a selenium-arsenic alloy is deposited on a conductive substrate, and then the surface of this photoreceptor layer is roughened to a surface roughness of 0.1 to 1.0 μm by a liquid honing method. manufacturing method.