JP2000314965A - Method for regenerating conductive substrate of organic photoreceptor - Google Patents

Abstract

[PROBLEMS] To effectively regenerate a conductive substrate by reliably removing a coating film forming a photosensitive layer and an undercoat layer from a discarded photoreceptor. A photosensitive member and an undercoat layer are swelled by immersing a photoreceptor in a swelling and stripping solution of immersion, and one end of the film of the swelled photosensitive layer and undercoat layer is held by a peeling device. Peel off spirally and remove.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for regenerating a conductive substrate of an organic photoreceptor for regenerating and utilizing a conductive substrate of a photoreceptor used in an electrophotographic image forming apparatus.

[0002]

2. Description of the Related Art Copiers and printers using an electrophotographic system are widely used. In the electrophotographic method, an electrostatic latent image of an image to be formed is formed on a photoreceptor, the electrostatic latent image formed on the photoreceptor is visualized with toner, and transferred to a recording material such as paper or a plastic film. Fixing process to obtain a copy of a desired image. In the organic photoreceptor used for image formation, an undercoat layer is provided on a conductive substrate to enhance adhesion and charge retention, and a charge generation coating film and a charge transport coating film are formed on the undercoat layer. Those in which a photoreceptor layer is formed by sequentially laminating are often used. At the time of forming each of these coating films, the electrical characteristics of the photoconductor slightly change depending on the physical properties of the coating solution, the coating conditions, the drying conditions of the coated product, and the like.

It is inevitable that some defective products are produced during the production of this photoconductor, and if the electrical characteristics of the photoconductor are out of a specified range, a high-quality copy cannot be obtained. Discarded. In addition, if the photoreceptor is used for a long time and the image formation is repeated, the copying function is deteriorated due to deterioration of the photoreceptor and the like. I can't. Among the photoconductors discarded in this way, the conductive substrate is less likely to be damaged or deteriorated during the manufacture or use of the photoconductor, and is expensive because it is manufactured with high-purity material with high accuracy.
It is preferable to collect and reuse. Even if the conductive substrate is damaged or deformed, it can be reused as a raw material.

In order to recycle the conductive substrate, a photoreceptor is reprocessed by, for example, spraying a high-pressure water jet onto the surface of a photosensitive layer of an organic photoreceptor as disclosed in Japanese Patent Application Laid-Open No. 3-55556. The photoconductive layer is removed by peeling the photosensitive layer from the substrate surface by the water pressure, or immersing the photoconductor in a water-soluble solvent dissolving an organic polymer as shown in JP-A-8-297371. Can be peeled off.
95544 and JP-A-5-181289,
As disclosed in JP-A-10-39520 and the like, after immersion in a swelling and stripping solution for swelling the binder resin constituting each layer of the photoreceptor, each layer of the photoreceptor is swelled, Each layer swollen by vibrating the substrate, removing the swollen layers by flowing the swollen stripping liquid, generating ultrasonic vibration in the swollen stripping liquid, colliding synthetic resin particles, or rubbing with a brush etc. Are removed, or each layer is removed from the swelling stripping solution and removed by swelling using a shower or a brush.

[0005]

However, the method of exfoliating the undercoat layer or the photoreceptor layer of the photoreceptor by applying an external force such as water jet or ultrasonic wave requires a method for removing the respective layers completely from the substrate. It is necessary to input enough energy to cause damage. Conversely, if the amount of input energy is reduced so as not to damage the substrate, there is a problem that each layer cannot be peeled sufficiently. In addition, the method of dissolving and removing each layer involves a large amount of resin or pigment mixed in the solution, and the resin or pigment tends to adhere to the rubbing member for removing the dissolved coating film. There is a disadvantage that there is less. In addition, it is necessary to separately prepare means for regenerating the dissolving solution and the rubbing member, which increases the cost. Further, when the undercoat layer is insoluble in a solvent, the undercoat layer cannot be removed.

[0006] After swelling the binder resin constituting each layer,
The method of vibrating the substrate in the swollen stripping solution or flowing the solution to remove the swollen film requires a means for collecting the removed film because it floats in the solution, and the peeling force is weak. There is a problem that the film remains without being completely removed. Further, the method of removing the swollen film by using a shower has a disadvantage that the film released in the liquid is divided into small pieces and adheres again to the substrate. In addition, the method of removing the swollen film by removing it from the swelling peeling liquid and using a shower or rubbing it with a brush or the like is that small pieces that have been peeled off and separated are re-adhered to the substrate or the film remains without being completely removed. There is a disadvantage of doing so.

The present invention has been made to solve the above-mentioned disadvantages, and it is possible to reliably remove a coating film forming a photosensitive layer or an undercoat layer from a discarded photoreceptor, thereby regenerating an electroconductive substrate. It is an object of the present invention to provide a method for regenerating a conductive substrate.

[0008]

According to the present invention, there is provided a method for regenerating a conductive substrate of an organic photoreceptor, comprising the steps of: laminating a photoreceptor in which an undercoat layer and a photosensitive layer are sequentially laminated on a conductive substrate; And swelling the undercoat layer, and then removing the swelled photosensitive layer and one end of the film of the undercoat layer by spirally peeling off the film.

When the swollen film is peeled off from the conductive substrate, it is preferable to remove a swelling stripper contained in the peeled film.

A second method for regenerating an organic photoreceptor according to the present invention is directed to a method for regenerating a photoconductive member comprising a conductive substrate and an undercoat layer and a photosensitive layer laminated in this order on a conductive substrate. After the layer is swollen, the photoconductor is attached to the centrifuge so that the rotation axis of the photoconductor is orthogonal to the rotation axis of the centrifuge, and the swollen film is separated from the conductive substrate by rotating the centrifuge. I do.

A third method for regenerating an organic photoreceptor according to the present invention is a method for regenerating a conductive layer of an organic photoreceptor. After the layer is swollen, pressurized air is blown from an end of the swollen film to separate the swollen film from the conductive substrate.

A fourth method for regenerating an organic photoreceptor according to the present invention is a method for regenerating a conductive layer of an organic photoreceptor. After the layer is swollen, the swollen film is suctioned by a suction machine to separate the swollen film from the conductive substrate.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION In a method for regenerating a conductive substrate according to the present invention, a photoreceptor is immersed in, for example, a swelling stripping solution of a stripping cleaning solution containing, for example, an organic ester compound and water as main components and then taken out. The photoreceptor is rotatably held, and one end of the swollen film is grasped, and the photoreceptor is rotated while being pulled from the tangential direction to the normal direction, and is spirally separated from the conductive substrate.
When the swollen film is peeled off, the photoreceptor rotates following the pulling force of the film, so that the film of the photosensitive layer and the film of the undercoat layer are easily peeled off from the surface of the conductive substrate.

[0014]

FIG. 1 is a block diagram of one embodiment of the present invention.
As shown in the figure, the apparatus for regenerating a conductive substrate of a photoreceptor has an immersion tank 1 and a peeling device 2. The immersion tank 1 has a temperature control device 3, stores a swelling and stripping solution 5 for swelling the undercoat layer and the photosensitive layer of the photoconductor 4, and immerses the photoconductor 4 transported by the transport device. The peeling device 2 has a holder 6 and a peeling means 7. The holder 6 rotatably holds the photoconductor 4. The peeling means 7 is disposed so as to be movable in the longitudinal direction of the photoconductor 4 held by the holder 6, and is a winding roller for winding the undercoat layer or the photosensitive layer film of the photoconductor 4, the undercoat layer or the photosensitive layer. A roller pair or the like that sends out the film with the film interposed therebetween, and peels the undercoat layer and the photosensitive layer from the photoconductor 4.

As shown in the cross-sectional view of FIG. 2, the photosensitive member 4 to be processed by the conductive substrate reproducing apparatus has an undercoat layer 22 on the surface of a conductive substrate 21 and a charge generating layer 23 constituting a photosensitive layer. The transport layer 24 is laminated to form a coating film. The conductive base 21 is made of a metal such as aluminum, nickel, iron, copper, or the like, or an alloy containing these metals as a main component, polyester such as polyethylene terephthalate, polycarbonate, phenolic resin, polyimide, glass, or the like. A metal thin film formed of gold, silver, or the like, or a thin film of a conductive inorganic compound such as tin oxide or indium oxide formed on the insulating substrate is used.

The undercoat layer 22 is formed by dispersing an inorganic pigment in a binder resin for forming an organic solvent-insoluble coating film such as a cured resin or the binder resin. Alkyd resin, melamine resin, phenol resin, polyurethane resin, epoxy resin, benzoguanamine resin, casein, etc. are used as binder resins, and titanium oxide, alumina, zirconia, zinc oxide, silica, titanium zinc, etc. are used as inorganic pigments. And
These resins and pigments are used alone or as a mixture of two or more. The thickness of the undercoat layer 22 is generally 1 μm to 6 μm.
It is.

The charge generation layer 23 is formed mainly of an organic pigment that generates charges when irradiated with light. The charge generating layer 23 is formed by dispersing the charge generating pigment alone or together with a binder resin in a solvent using a dispersing machine such as a ball mill, an attritor, a Glen mill, a sand mill, or a bead mill. It is formed by coating on the surface of No. 22 and has a thickness of 0.1 μm to 2 μm. Pigments used in the charge generation layer 23 include pi-electrons such as disazo, triazo, azoxybenzene, benzimidazole, polycyclic quinone, perylene, indigoid, quinacridone, phthalocyanine, and methine. Is an organic pigment. The binder resin used in the charge generation layer 23 is generally a resin that forms an organic solvent-soluble coating film, and is one or a mixture of two or more thermoplastic resins such as polyvinyl butyral, polystyrene, silicon resin, and polyester. . Dispersion medium solvents include cyclohexanone, tetrahydrofuran, methyl ethyl ketone, acetone, toluene, methanol and the like.

The charge transport layer 24 is a coating film for transporting charges generated in the charge generation layer 23, and is formed by applying a coating solution containing a charge transport substance and a binder resin on the charge generation layer 23, Its thickness is between 15 μm and 40 μm. The charge transport material used for the charge transport layer 24 is a poly-N-vinyl carbazole compound, a pyrazoline compound, an α-phenylstilbene compound, a hydrazone compound, a diarylmethane compound, a triphenylamine compound, a divinylbenzene compound. , Fluorene-based compounds, anthracene-based compounds, oxadiazole-based compounds, and diaminocarbazole-based compounds. The binder resin is generally a resin that forms an organic solvent-soluble coating film, and resins such as polycarbonate, polyvinyl butyral, polyester, and poly-N-vinyl carbazole are used. Solvents such as dichloromethane, tetrahydrofuran, dichloroethane, toluene, and ethyl methyl ketone are used.

The operation of removing the coating film of the undercoat layer 22, the charge generation layer 23 and the charge transport layer 24 laminated on the conductive substrate 21 by the conductive substrate reproducing device will be described.

First, the photoreceptor 4 for peeling off the undercoat layer and the photosensitive layer
Is transported by the transport device and immersed in the immersion tank 1 in which the swelling / stripping liquid 5 is stored. The swelling and stripping solution 4 stored in the immersion tank 1 includes those comprising an organic compound and water which swell or dissolve the binder resin constituting the undercoat layer and the photosensitive layer, and those comprising an inorganic acid and water. Organic compounds that swell or dissolve the binder resin include methylcellosolve, butylcellosolve, tetrahydrafuran, methyl ethyl ketone, methyl isobutyl ketone, acetone, cyclohexanone, methanol, diethylene glycol, methylene chloride, N,
N'-dimethylacetamide, N, N'-dimethylformamide, ethyl acetate, dimethyl adipate, dimethyl glutarate, dimethyl succinate, 2-ethylhexane, oleic acid and the like. These are dissolved or dispersed in water in the form of a single compound or a mixture of several compounds. In some cases, a small amount of a surfactant is added to the swelling / stripping liquid 4.

While the swelling and stripping solution 5 in the immersion tank 1 is maintained at a temperature of 50 to 90 ° C. by the temperature controller 3, the photosensitive member 4 is immersed for several minutes to several hours to swell the photosensitive layer and the undercoat layer. Since the swelling and stripping solution 5 maintained at a temperature of 50 to 90 ° C. swells the photosensitive layer and the undercoat layer of the photoreceptor 4, the swelling ability of the swelling and stripping solution 5 can be increased and the swelling can be performed in a short time. be able to. Note that the swelling and stripping solution 5 may be continuously flowed over the surface of the photoconductor 4 to swell the photosensitive layer and the undercoat layer.

After immersing the photoconductor 4 in the swelling and stripping solution 5 for a predetermined time, the photoconductor 4 is taken out of the immersion tank 1 and both ends of the photoconductor 4 are set and held on a chuck 8 provided on a rotating shaft of the holder 4. In this state, as shown in the perspective view of FIG. 3A, one end of the swollen film 9 is grasped and peeled while being pulled from the tangential direction to the normal direction, and the end of the peeled film 9 is peeled off. 7 is gripped. In this state, the peeling means 7 is driven, and the peeling means 7 is gradually moved in the axial direction while pulling the film 9 peeled by the peeling means 7 so as not to be cut off in the middle.
The film 9 of the photosensitive layer and the undercoat layer is peeled spirally from the surface of the substrate.
When the film 9 is peeled by the peeling means 7, the photosensitive member 4 is rotated by the pulling force of the film 9, so that the photosensitive layer and the undercoat layer 9 are reliably peeled from the surface of the conductive substrate 21. can do. In addition, a driving device such as a motor is provided in the holder 4,
The photoconductor 4 may be rotated by driving the driving device in synchronization with the operation of the peeling unit 7.

As described above, since the film 9 of the photosensitive layer and the undercoat layer of the photosensitive member 4 is swollen and then the film 9 is peeled off from the surface of the conductive substrate 21, the photosensitive layer and the undercoat layer are formed on the conductive substrate 21. Can be prevented from remaining. Further, since the film 9 is peeled off by the peeling means 7 and collected, the peeled film 9 is removed.
Can be prevented from reattaching to the surface of the conductive substrate 21, and the photosensitive layer and the undercoat layer can be reliably removed from the conductive substrate 21.

When the swelled film 9 of the photosensitive layer and the undercoat layer is peeled off from the photoreceptor 4 as described above, most of the swelled film 9 is softened. May be cut off halfway through.
Therefore, as shown in FIG. 3B, the film 9 peeled off from the water jet nozzle 10 is sprayed with water to remove the components of the swelling peeling liquid 5 contained in the film 9 peeled off. 9 is preferably cured. By removing the swelling and stripping liquid 5 from the peeled film 9 and hardening, the film 9 being pulled by the peeling means 7 can be prevented from being cut in the middle,
The photosensitive layer and the undercoat layer can be stably removed from the conductive substrate 21.

In the above-described embodiment, the photosensitive layer of the photosensitive member 4 and the swollen film 9 of the undercoat layer are pulled by the peeling means 7 to form the conductive substrate 21.
Although the description has been given of the case where the film 9 is peeled off from the substrate, the swelled film 9 of the photosensitive layer and the undercoat layer of the photoreceptor 4 may be peeled off by a centrifuge. For example, as shown in FIG.
1 is provided with a fixing jig 13 symmetrically so as to hold the rotation axis of the photoconductor 4 so as to be orthogonal to the rotation axis 12. The photoconductor 4 taken out of the immersion tank 1 is held in a floating state on the fixing jig 13, and the centrifugal separator 6 is rotated to remove the swollen film 9 from the conductive substrate 21. In this case, the rotation speed of the centrifugal separator 6 is in the range of 100 rotations / minute to 5000 rotations / minute, preferably 500 rotations / minute to 2000 rotations / minute.
A range of minutes is desirable. By rotating the centrifuge 11 holding the rotation axis of the photoconductor 4 so as to be orthogonal to the rotation axis 12 of the centrifuge 11, the photosensitive layer and the undercoat layer are easily removed from the conductive substrate 21. can do.

Further, the end of the swelled film 9 of the photosensitive layer and the undercoat layer of the photosensitive member 4 may be blown with pressurized air to separate it from the conductive substrate 21. For example, as shown in FIG. 5, the photoreceptor 4 taken out of the immersion tank 1 is fixed to a fixed base 14 so that the rotation axis is upright, and a clean end is formed on an upper end of the swollen film 9 of the photoreceptor 4 from an air jet nozzle 15. Blow compressed air. Pressurized air blown to the upper end of the film 9 enters between the film 9 and the conductive substrate 21, and separates and removes the film 9 from the conductive substrate 21.

Further, as shown in FIG.
The upper end of the photoreceptor 4 taken out of the apparatus is fixed to a fixing jig 16 and is sucked from the lower end by a hanging suction device 17 as shown in FIG.
As shown in (b), the film 9 may be sucked from the end of the swollen film 9 by a suction device 17 provided on a side surface of the photoreceptor 4 fixed to the fixing table 14 so that the rotation axis is upright.

Next, a specific example in which the photosensitive layer of the photosensitive member 4 and the film 9 of the undercoat layer are separated and removed, and a comparative example will be described. The conductive substrate 21 of the photoconductor 4 used has an outer diameter of 30 mm and a length of 3 mm.
A cylindrical aluminum having a thickness of 50 mm and a thickness of 1 mm was used, a cutting oil was applied to the surface, and after cutting, the surface was degreased and washed with a neutral detergent. The undercoat layer 22 is a coating film composed of 20 parts by weight of titanium oxide, 10 parts by weight of alkyd resin, and 10 parts by weight of melamine resin. A mixture thereof and 60 parts by weight of methyl ethyl ketone are put into a ball mill and dispersed and mixed for 48 hours. The used coating solution was used. This coating solution is applied to the surface of the conductive substrate 21 by dipping coating, and after application, the coating is heated at 150 ° C. for 15 minutes and thermally cured to form an undercoat layer 22 having a thickness of about 5 μm.
Was formed. The charge generation layer 23 is made of bratyl resin (UCC
(XYHL), 1 part by weight, dissolved in 30 parts by weight of cyclohexanone, 9 parts by weight of a disazo pigment represented by the following chemical formula was added and dispersed by a ball mill for 98 hours, and then a mixed liquid of 30 parts by weight of cyclohexanone and 30 parts by weight of tetrahydrofuran Was used to prepare a coating solution. This coating solution was applied to the surface of the undercoat layer 22 by dipping coating, and after application, it was dried by heating at 100 ° C. for 10 minutes.

[0029]

Embedded image

The charge transport layer 25 is prepared by dissolving 10 parts by weight of a polycarbonate resin (manufactured by Teijin Limited, Panlite K-1300) and 10 parts by weight of a charge transfer agent (hydrazone compound) represented by the following chemical formula in 80 parts by weight of dichloromethane. The coating solution prepared as described above was used. This coating solution was applied on the surface of the charge generation layer 22 by dipping coating, and after being applied, dried by heating at 120 ° C. for 15 minutes.

[0031]

Embedded image

[Specific Example 1] As the swelling stripping solution 5, a stripping cleaning solution (Q Clean P-201, manufactured by Kentos) containing an organic ester compound and water as main components was used. The photoreceptor 4 was immersed for 30 minutes while maintaining the swelling and stripping solution 5 at a temperature of 70 ° C. The photoconductor 4 was taken out, pulled out from the upper end portions of the film 9 of the swelled photosensitive layer and the undercoat layer by the stripping device 2 shown in FIG. The conductive substrate 2 from which the film 9 has been peeled off
1 was washed with tap water to remove the swelling stripper 5, and then washed with distilled water and dried by heating. By repeating this peeling method,
0 samples A were prepared.

[Specific Example 2] As shown in FIG. 3, the photosensitive member 4 immersed in the swelling / separating liquid 5 under the same conditions as the specific example 1 The swelling film 9 was peeled off by the peeling device 2 while the film 9 was cured while removing the components of the swelling peeling liquid 5 contained therein, thereby preparing ten samples B.

[Specific Example 3] The photoreceptor 4 immersed in the swelling and stripping solution 5 under the same conditions as in the specific example 1 was set in a centrifuge 11 as shown in FIG. The film 9 was swollen for 5 minutes to remove the swollen film 9, and ten samples C were prepared.

[Specific Example 4] As shown in FIG. 5, the film 9 swelled by blowing compressed air from the upper end portion to the photosensitive member 4 immersed in the swelling and stripping solution 5 under the same conditions as in the specific example 1. Separated and removed, ten samples D were prepared.

[Specific Example 5] As shown in FIG. 6A, the photosensitive member 4 is swelled by suction from the lower end portion of the photosensitive member 4 immersed in the swelling and stripping solution 5 under the same conditions as in Specific Example 1. The remaining film 9 was removed and collected, and ten samples (E-1) were prepared. As shown in FIG. 6B, the swelling film 9 is removed from the upper end of the photoreceptor 4 by suction using a suction device 17, and
0 samples (E-2) were prepared.

Samples A to A prepared in Examples 1 to 5
By observing the surface of (E-2), the presence or absence of the remaining undercoat layer or photosensitive layer was examined and compared with a new conductive substrate. The following table shows the number of samples of the same quality as a new conductive substrate, the number of samples that are inferior to the new conductive substrate but have no practical problems, and the number of samples that are practically unusable and unusable. Show.

[0038]

[Table 1]

As shown in the above table, all of the samples A to (E-2) except the one in which the film 9 peeled off in the sample A was cut off in the middle, the swollen film 9 was securely connected to the conductive substrate 21. And practically reused.

COMPARATIVE EXAMPLE 1 The photosensitive layer of the photosensitive member 4 formed as described above was rubbed off while adding a solvent to a sponge, and then the conductive substrate 21 in which the undercoat layer 22 remained was filled with dichloromethane. After applying the ultrasonic vibration for 1 hour, the conductive substrate 21 is taken out of the container and immersed again in the container containing clean dichloromethane, and the ultrasonic vibration is applied for 1 hour.
After giving it for 0 minutes, it was taken out and air-dried to prepare 10 samples F.

[Comparative Example 2] The photosensitive member 4 was immersed in the swelling and stripping solution 5 for 30 minutes under the same conditions as in the specific example 1 and then taken up while applying vertical vibration to remove the swollen film 9 and washed with tap water. The swelling / stripping solution 5 was removed by washing with water, and further washed with distilled water and then dried by heating to prepare 10 samples G.

Comparative Example 3 The same swelling and stripping solution 5 as in Example 1 was heated to 70 ° C. and subjected to ultrasonic vibration while immersing the photoreceptor 4, taken out 30 minutes later, and the film 9 was peeled off to remove the conductive substrate 2.
1 was washed with tap water, washed with distilled water, and dried by heating to prepare 10 samples H.

Comparative Example 4 The same swelling and stripping solution 5 as in Example 1 was heated to 70 ° C. to immerse the photoreceptor 4 and taken out 30 minutes later, and water was applied from a shower to remove the swelling film 9. Wash with tap water, wash with distilled water, heat and dry,
Ten samples I were made.

Comparative Example 5 The same swelling and stripping solution 5 as in Example 1 was heated to 70 ° C. to soak the photoreceptor 4, taken out 30 minutes later, rubbed with a brush to remove the swollen film 9, and washed with water. After heating and drying, ten samples J were prepared.

By observing the surfaces of the samples F to J of Comparative Examples 1 to 5, the presence or absence of the remaining undercoat layer or photosensitive layer was checked.
It was compared with a new conductive substrate. The following table shows the number of samples of the same quality as a new conductive substrate, the number of samples that are inferior to the new conductive substrate but have no practical problems, and the number of samples that are practically unusable and unusable. Show.

[0046]

[Table 2]

As shown in the above table, most of the samples F to J are practically unusable, and the conductive substrates 2
Reproduction of 1 was almost impossible.

[0048]

As described above, the present invention swells the photosensitive layer and the undercoat layer by immersing the photoreceptor in the swelling and stripping solution, and then holds one end of the film of the swollen photosensitive layer and the undercoat layer. Since the photosensitive layer and the undercoat layer can be reliably removed from the conductive substrate of the photoreceptor, the conductive substrate can be effectively reused.

Further, when the swollen film is peeled off from the conductive substrate, the swelling peeling liquid contained in the peeled film is removed and hardened, thereby preventing the peeled film from being cut in the middle. The photosensitive layer and the undercoat layer can be stably removed from the conductive substrate.

Further, a photosensitive member in which a subbing layer and a photosensitive layer are sequentially laminated on a conductive substrate is immersed in a swelling and stripping solution to swell the photosensitive layer and the subbing layer. Rotate the centrifuge to separate the swollen membrane from the conductive substrate, or blow the pressurized air from the end of the swollen membrane to make the swollen membrane conductive. By separating the swollen film from the conductive substrate by separating the swollen film from the conductive substrate by suctioning the swollen film with a suction machine,
The photosensitive layer and the undercoat layer are reliably removed from the conductive substrate, so that a conductive substrate of the same quality as a new conductive substrate can be reliably reproduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a coating film of a photoreceptor.

FIG. 3 is a perspective view showing a peeling operation of the embodiment.

FIG. 4 is a perspective view showing a peeling operation of the second embodiment.

FIG. 5 is a perspective view showing a peeling operation according to a third embodiment.

FIG. 6 is a perspective view showing a peeling operation according to a fourth embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 immersion tank 2 stripping device 3 temperature control device 4 photoreceptor 5 swelling stripping solution 6 holder 7 stripping means 21 conductive substrate 22 undercoat layer 23 charge generation layer 24 charge transport layer

Claims (5)

[Claims] 1. A method in which a photosensitive member in which a subbing layer and a photosensitive layer are sequentially laminated on a conductive substrate is immersed in a swelling and stripping solution to swell the photosensitive layer and the subbing layer. A method for regenerating a conductive substrate of an organic photoreceptor, comprising removing one end of the film by spirally peeling it off while holding one end of the film. 2. The method for regenerating a conductive substrate of an organic photoreceptor according to claim 1, wherein when the swollen film is peeled off from the conductive substrate, a swelling stripping solution contained in the peeled film is removed. 3. A photoconductor in which a subbing layer and a photosensitive layer are sequentially laminated on a conductive substrate is immersed in a swelling and stripping solution to swell the photoconductor and the subbing layer. A method for regenerating a conductive substrate of an organic photoreceptor, wherein the method comprises attaching the device to a centrifugal separator so as to be orthogonal to the rotation axis, and rotating the centrifuge to separate the swollen film from the conductive substrate. 4. A photoconductor in which an undercoat layer and a photosensitive layer are sequentially laminated on a conductive substrate, the photosensitive layer and the undercoat layer immersed in a swelling and stripping solution are swollen, and then pressure is applied from the edge of the swollen film. A method for regenerating a conductive substrate of an organic photoreceptor, wherein the swollen film is separated from the conductive substrate by blowing air. 5. A photoconductor in which a subbing layer and a photosensitive layer are sequentially laminated on a conductive substrate is immersed in a swelling and stripping solution to swell the photosensitive layer and the subbing layer, and the swollen film is sucked by a suction machine. A method for regenerating a conductive substrate of an organic photoreceptor, comprising separating the swollen film from the conductive substrate.