JPS60192951A - Production of electrophotographic sensitive body - Google Patents

Abstract

PURPOSE:To remove quickly and effectively the binder of a photoconductive layer by moving a cleaning tape impregnated with a solvent which can dissolve the binder in the direction opposite from the rotating direction of a base in the stage of wiping the surface of the base with said tape to clean the same. CONSTITUTION:The side edges of a photoconductive layer formed on a base are dipped in a soln. which can dissolve the photoconductive layer to strip the photoconductive layer from the side edges. The photosensitive layer subjected to such stripping is transferred into a wiping and cleaning device in the stripping section. The stepping motor 17 of the wiping and cleaning device is so driven as to move a cleaning tape 11 in the direction opposite from the rotating direction of the photosensitive body which is supported by a chuck 9 and is thus rotated. A cleaning tape 11 impregnated with a treating solvent is pressed by the effect of an air cylinder 12 to the part of the photosensitive body from which the photoconductive layer is stripped. The tape 11 is thus pressed to the stripped part under rotation to wipe the surface of the stripped part thereby cleaning said part.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention particularly aims at improving the adhesion between the edges of the support and the insulating layer when producing an electrophotographic photoreceptor in which a photoconductive layer and an insulating layer are formed on the surface of the support. The present invention relates to a method of manufacturing an electrophotographic photoreceptor that can increase mechanical strength.

Electrophotographic photoreceptors have various configurations in order to obtain predetermined characteristics or depending on the type of electrophotographic process to which they are applied. Typical electrophotographic photoreceptors include photoreceptors with a photoconductive layer formed on a support and photoreceptors with an insulating layer on the surface, and these photoreceptors are widely used. There is. The photoreceptor, which consists of a support and a photoconductive layer, is produced using the most common electrophotographic process.
That is, it is used for charging, image exposure, development, and, if necessary, image formation by transfer. Additionally, for photoreceptors with an insulating layer on the support, this insulating layer may be used to protect the photoconductive layer, improve the mechanical strength of the photoreceptor, improve dark decay properties, or be applied in certain electrophotographic processes. It is established for the purpose of A typical example of a photoreceptor having such an insulating layer or an electrophotographic process using a photoreceptor having an insulating layer is disclosed in, for example, US Pat. No. 28,600.
48 Publication, Special Publication No. 41-16429, Special Publication No. 3
Publication No. 8-15446, Japanese Patent Publication No. 46-3713,
Special Publication No. 42-23910, Special Publication No. 43-2474
Publication No. 8, Special Publication No. 19747, Special Publication No. 1974, Publication No. 1974, Special Publication No. 19747
-4121, etc.

As a matter of course, an electrophotographic photoreceptor is not only required to have predetermined sensitivity 1 electrical properties and optical properties depending on the electrophotographic process to which it is applied, but also
Mechanical durability of the photoreceptor is also important.

By the way, when the above-mentioned photoconductive layer is composed of a photoconductive material and a binder, it may become a porous layer, and the degree of porosity depends on the type of photoconductive material and the amount of binder. Determined by In addition, when an insulating layer is provided on a porous photoconductive layer formed by layering a photoconductive material on the above-mentioned binder, in order to increase the strength of both ends of the insulating layer, As shown in FIG. 2, exposed parts of the support 1 are formed at both side edges of the photoconductive layer 2 applied to the peripheral surface of the support 1, and an insulating layer 3 is formed directly on this exposed part. Therefore, it is necessary to cover the insulating layer 3 so that the edges of the photoconductive layer 2 are not exposed. This is because, especially in a photoreceptor used for liquid development, if the edge of the photoconductive layer 2 is exposed, the developer will penetrate into the photoconductive layer 2, which will have an adverse effect on the photographic image. is occurring.

For this reason, when forming the photoconductive layer 2 and the insulating layer 3 on the support 1, in order to prevent both side edges of the photoconductive layer 2 from being exposed, as shown in FIG. It is necessary to cover the photoconductive layer 2 by gluing the edges directly to the support l. As a means for adhering the edge portion of the insulating layer 30 to the support l in this way, the photoconductive layer 2 formed on the support
By removing the edges of the supporting body 1, the edges of both sides of the support body 1 are made with a predetermined width ζ
', but in order to remove the edge of the photoconductive layer 2, the edge of the photoconductive layer 20 is peeled off with a rubber grade while immersing the edge of the photoconductive layer 20 together with the support in a solvent. Next, an insulating layer 3 is applied to the surface of the layer 2 using the peeled portion and the light 4. However, when the insulating layer 3 is applied, if a thin layer of the binder for fixing the photoconductive layer 2 remains on the surface of the support 1, the support is not supported by this binder. There was a problem in that the adhesion between the body 1 and the insulating layer 3 was poor, and the insulating layer 3 would peel off from the support 1 after long-term use.The present invention was made to solve this problem. It is an object of the present invention to provide a method for manufacturing an electrophotographic photoreceptor that can improve mechanical strength and durability by improving the adhesion between the body and the insulating layer.

Embodiments of the present invention will be described in detail below based on the embodiments shown in FIGS. 3 to 6.

Electrophotographic photoreceptor (
In 4), the peeling device for removing the photoconductive layer 2 on both side edges of the support 1 to a predetermined width is a chuck for chucking the inner side of the photographic photoreceptor (A), as shown in FIG. 4, a motor 5 that rotates the chuck 4,
A liquid tank 7 for immersing the lower edge of the photographic photoreceptor (A) supported by the chuck 4 in the stripping solvent 6, and a portion of the photographic photoreceptor (A) immersed in the stripping TD agent 6. Break the rubber blade 8 that comes into contact with it, and rotate the photosensitive member (4) while dipping the lower edge of the photosensitive member (A) that is chucked by the chuck 4 into the stripping solvent 6, and then immerse it in the stripping solvent. By bringing the rubber blade 8 into contact with the area, the photoconductive layer 2 on the outer periphery of the edge of the support 1 can be removed in a constant width.

The photographic photoreceptor (A) from which the photoconductive layer 2 on the outer periphery of the support 1 has been peeled off in this manner is transferred to a cleaning device for the peeled portion. This wiping treatment device is shown in Figures 4 and 5.
As shown in the figure, a chuck 9 for chucking the photographic photoreceptor (A), a motor 1O for rotating the chuck 9, and a cleaning tape 11 that comes into contact with the photoconductive layer peeling portion of the support 1. An air cylinder 12 for pressing the cleaning chip 11 against the peeling section, a solvent delivery pipe 13 for impregnating the cleaning chip 7'll with a processing solvent, and a solvent delivery pipe 13 for discharging the processing solvent in the liquid tank 14. An I pump 15 for discharging the cleaning tape 11, a winding roll 16 for the cleaning tape 11, and a winding roll 1 for the cleaning tape 11.
6, this stepping motor 17 rotates the chuck 9.
The cleaning tape 11 is driven to move in a direction opposite to the rotating direction of the photographic photoreceptor (A), which is supported and rotated by the cleaning tape 11. Further, a cleaning tape 11 impregnated with a processing solvent is pressed by the action of an air cylinder 12 onto the photoconductive layer peeling portion 1a of the photographic photoreceptor (A). Therefore, the cleaning tape 11 impregnated with a processing solvent is pressed against the photoconductive layer peeled part 1a of the rotating photographic photoreceptor, thereby wiping the surface of the photoconductive layer peeling part 1a and removing the condensation. A support surface portion from which the adhesive resin has been completely removed is obtained, and the adhesive strength of the insulating layer to the core portion in a subsequent process is increased.

Example A photoconductive layer 2 was formed by dipping a photoconductive paint onto the surface of a cylindrical cylinder 1 made of aluminum, and then 7 mm of both side edges of the cylinder 1 were immersed in a methyl ethyl ketone solution as a stripping solvent. While soaking, chuck 4
The cylinder 1 was rotated in a certain direction, and the photoconductive layer was peeled off by pressing the rubber blade 8 with a lance at a certain pressure against the part immersed in the solution.

Next, a cleaning tape 11 impregnated with a processing solvent is brought into contact with the peeled portion 1a peeled off in the previous step using the above-mentioned wiping treatment device.
To bring the cleaning tape 11L into contact with the peeled portion 11L of the cylinder 1, the roll 16 that winds up the cleaning tape 11 is rotated in the opposite direction to the rotational direction of the cylinder 1, so that the peeled portion 1a and the cleaning tape 11 are brought into contact with each other. By increasing the contact friction force, the part 1 to be peeled off by this cleaning tape 11
The surface of a was quickly and reliably wiped.

Ethylene is then applied on the photoconductive layer 2 and the above-mentioned cleaning area.
Acrylic acid copolymer resin (product name: FAA-9300
(manufactured by UCC) was applied by a dip coating method and dried by heating at 80° C. for 20 minutes to form a sealing layer. Next, photocurable polyester resin (product name: CM-UV-10
2, Oak, -) was applied by dip coating, and the furnace temperature was 100°C.
After drying for 4 minutes using a V-drying device, it was cured by irradiating ultraviolet rays for 20 seconds to form an insulating layer 3 with a thickness of 30 μm.

Comparative Example An electrophotographic photoreceptor (photosensitive drum) prepared according to the above example and a conventional electrophotographic photoreceptor, that is, an electrophotographic photoreceptor (photosensitive drum) not subjected to wiping treatment using a wiping processing device. As a result of a durability test using a Canon NP-3 copier, it was found that the electrophotographic photoreceptor subjected to the wiping process of the present invention did not peel off the insulating layer 3 even after a durability test of 20,000 sheets. However, in the conventional product, peeling of the insulating layer 3 occurred at both side edges of the photoreceptor during a durability test of 2,000 sheets.

As explained above, in the present invention, when the surface of the support from which the photoconductive layer has been peeled is wiped with a cleaning tape impregnated with a solution that can dissolve the binder of the photoconductive layer,
Since the cleaning tape that is brought into contact with the support is moved in the opposite direction to the rotating direction of the support, the contact friction between the support surface and the cleaning tape increases, and this increases the support There is a point at which cleaning of the body surface, ie, removal of the binder, can be accomplished quickly and effectively.

[Brief explanation of drawings]

FIG. 1 is an explanatory cross-sectional diagram showing the structure of an electrophotographic photoreceptor, FIG. 2 is an explanatory diagram of the surface of an electrophotographic photoreceptor in which a photoconductive layer is formed on the surface of a support, and FIGS. 3 and 4 are illustrations of the present invention. FIG. 5 is an explanatory diagram of a peeling device and a wiping device used in the manufacturing process of a different electrophotographic photoreceptor, FIG. 5 is an explanatory diagram of FIG. 4, and FIG. 6 is a perspective view of the main parts of the same. DESCRIPTION OF SYMBOLS 1...Support 2...Photoconductive layer 3...Insulating layer 4...Chuck 5...Motor 6...Peeling solvent 7...Liquid tank 8...Rubber blade 9... - Chuck 10... Motor 11... Cleaning team f 12... Air cylinder 13... Solvent delivery pipe 14... Liquid tank 15... Bong 76 16... Winding roll 17...・Stepping motor Fig. 5 Fig. 6

Claims (1)

[Claims] In a method for producing an electrophotographic photoreceptor in which a photoconductive layer and an insulating layer are formed on a support, the edge of the photoconductive layer formed on the support is immersed in a solvent that can dissolve the photoconductive layer. ,
The photoconductive layer at the edge is peeled off, and then a cleaning tape impregnated with a solvent in which the binder of the photoconductive layer is dissolved is brought into contact with this peeled area, and the cleaning tape is applied to the support. A method for manufacturing an electrophotographic photoreceptor, which comprises wiping the peeled portion while moving the photoreceptor in a direction opposite to the rotational direction.