An organic photoconductive drum and its preparation method and application

Abstract

The present invention belongs to the technical field of imaging equipment, and provides an organic photoconductor drum and a preparation method and application thereof. The coating for the conductive layer of the organic photoconductor drum provided by the present invention comprises a hole transport material, polycarbonate, and polysilazane in a specific ratio, which helps to improve the mechanical properties and chemical stability of the conductive layer. The organic photoconductor drum made of the coating can maintain a low wear rate on the coating surface during long-term continuous printing tests. At the same time, during long-term storage, the degradation and oxidative splitting of the surface coating of the organic photoconductor drum are significantly reduced, thereby improving the printing quality.

Description

Technical Field

[0001] The present invention relates to the technical field of imaging equipment, and more specifically, to an organic photoconductive drum and a preparation method and application thereof. Background Art

[0002] Organic photoconductor drum (OPC, also known as photosensitive drum) is one of the core components used to form images in laser printers and copiers. Its main function is to convert the image information of laser or light into a charge image, and finally transfer it to paper to form a visible image or text. Organic photoconductor drum is a drum-shaped device made of photoconductive effect materials. In short, it is an aluminum tube with three layers of coating (blocking layer, generating layer, and conducting layer, respectively). The thickness of the blocking layer is generally 1.5-2.5μm, the absorbance of the generating layer is generally 0.2-0.3, and the thickness of the conducting layer (also known as the charge conducting layer) is generally 15-30μm. Among them, the conducting layer is usually located at the outermost layer of the organic photoconductor drum, and its structure and composition have an important influence on the performance of the entire organic photoconductor drum. The typical conducting layer is made of high molecular organic material, has good charge transfer ability, and also has certain mechanical strength and wear resistance.

[0003] However, the current conductive layer still has some shortcomings: first, the wear resistance is limited. During the printing process, the conductive layer needs to frequently contact with the scraper, developing roller and other components, and is easily subject to mechanical wear, resulting in damage to the surface of the conductive layer, thereby affecting the printing quality; second, the chemical stability is poor. Some conductive layer materials may undergo chemical degradation or reaction during long-term use, resulting in performance degradation.

[0004] Therefore, there is an urgent need to develop an organic photoconductive drum comprising a conductive layer with good wear resistance and chemical stability, so as to better apply it to the preparation of equipment such as laser printers and copiers to improve printing quality. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the above-mentioned prior art. To this end, the present invention proposes an organic photoconductive drum and a preparation method and application thereof. The coating for the conductive layer of the organic photoconductive drum provided by the present invention has a strong wear resistance. In the machine test, after long-term continuous use, the coating surface still maintains low loss (for example, when the number of printed pages is as high as 30,000 pages, the loss percentage is only 5.31%), and at the same time, the anti-oxidation splitting performance is excellent. During the long-term storage process, the conductive layer is resistant to oxidation and does not produce cracks. It can be stably stored for at least 72 hours and has excellent chemical stability.

[0006] A first aspect of the present invention provides a coating material for a conductive layer of an organic photoconductor drum.

[0007] Specifically, a coating for a conductive layer of an organic photoconductive drum includes the following raw material components:

[0008] The mass ratio of the hole transport material, the polycarbonate and the polysilazane is 0.81:1:(0.1-0.15).

[0009] The hole transport material is mainly responsible for transporting the carriers generated by the generating layer. Polycarbonate is used as an adhesive and plays a role in protecting the coating. Polysilazane is a liquid, and its functional group is mainly methyl, and it also contains Si-NH-Si bonds, so it can be cured at room temperature and can also be cured at high temperature. The main reactions involved in the curing are the hydrolysis and oxidation of Si-NH-Si bonds. At the same time, the Si-NH-Si bonds and the -OH of polycarbonate are easy to react and can form a good bonding force with the substrate. After the resin is cured, a three-dimensional cross-linked structure is formed, giving the material good mechanical properties. The present invention greatly improves the wear resistance of the conductive layer of the organic photoconductor drum by introducing polysilazane into the conductive layer of the organic photoconductor drum, making it not easy to degrade and oxidize and split, significantly improving the overall performance and service life of the organic photoconductor drum, improving the printing quality, and reducing the maintenance cost. In addition, the dosage ratio relationship between polycarbonate and polysilazane has a great influence on the performance of the conductive layer. When the two are used in a specific ratio, the organic photoconductor drum shows the best stability and low wear rate in the service life test, and maintains long-term anti-oxidation and anti-cracking quality.

[0010] The reactions involved in the curing process of polysilazane are as follows: (1) Hydrolysis reaction: At room temperature, the Si-NH-Si bonds in polysilazane undergo hydrolysis reaction with moisture in the air to generate ammonia and compounds containing Si-OH groups; (2) Oxidation reaction: The generated Si-OH groups further react with oxygen in the air to form more stable Si-O-Si bonds; (3) Formation of a three-dimensional cross-linked structure: The formation of Si-O-Si bonds causes cross-linking between polysilazane molecules, ultimately forming a stable three-dimensional network structure.

[0011] Preferably, the hole transport material is N,N'-diphenyl-N,N'-di(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine and / or 4-(2,2-diphenylvinyl)-N,N-di-p-tolylaniline.

[0012] Preferably, the coating for the conductive layer of the organic photoconductor drum comprises the following raw material components:

[0013] A hole transport material, polycarbonate, and polysilazane in a mass ratio of 0.81:1:0.1, 0.81:1:0.11, 0.81:1:0.12, 0.81:1:0.13, 0.81:1:0.14, or 0.81:1:0.15.

[0014] Preferably, the polysilazane is IOTA 9150 polysilazane produced by Anhui IOTA Silicone Oil Co., Ltd.

[0015] A second aspect of the present invention provides a method for preparing a coating for a conductive layer of an organic photoconductor drum.

[0016] A method for preparing a coating for a conductive layer of an organic photoconductive drum comprises the following steps:

[0017] The hole transport material, polycarbonate, polysilazane and solvent are mixed to obtain the coating for the conductive layer of the organic photoconductor drum.

[0018] Preferably, the mixing temperature is 40-60° C., and / or the mixing time is 4-6 h.

[0019] Preferably, the solvent is at least one of tetrahydrofuran, dichloromethane and dioxane.

[0020] Preferably, the conductive layer coating is passed through a filter tower to remove impurities. Removing impurities can ensure the uniformity of the conductive layer surface.

[0021] A third aspect of the present invention provides an organic photoconductor drum.

[0022] An organic photoconductive drum comprises a substrate, a barrier layer, a generating layer and a conducting layer which are stacked in sequence. The conducting layer is made of the coating for the conducting layer of the organic photoconductive drum.

[0023] Preferably, the raw materials for preparing the barrier layer include titanium dioxide and nylon resin.

[0024] Further preferably, the raw materials for preparing the barrier layer include titanium dioxide and nylon resin in a mass ratio of 1:(0.6-1).

[0025] More preferably, the raw materials for preparing the barrier layer include titanium dioxide and nylon resin in a mass ratio of 1:0.6, 1:0.7, 1:0.8, 1:0.9 or 1:1.

[0026] Preferably, the nylon resin is nylon 66.

[0027] Further preferably, the nylon resin is nylon 66 of model CM8000 produced by Toray Industries, Japan.

[0028] Preferably, the raw materials for preparing the generating layer include oxytitanium phthalocyanine and polyvinyl butyral.

[0029] Further preferably, the raw materials for preparing the generating layer include oxytitanium phthalocyanine and polyvinyl butyral in a mass ratio of 1:(0.2-0.6).

[0030] Further preferably, the raw materials for preparing the generating layer include oxytitanium phthalocyanine and polyvinyl butyral in a mass ratio of 1:(0.3-0.55).

[0031] More preferably, the raw materials for preparing the generating layer include oxytitanium phthalocyanine and polyvinyl butyral in a mass ratio of 1:0.25, 1:0.3, 1:0.35, 1:0.4, 1:0.45, 1:0.5, and 1:0.55.

[0032] Preferably, the barrier layer has a thickness of 1.5-2.5 μm, and / or the conductive layer has a thickness of 15-30 μm.

[0033] Preferably, the absorbance of the generating layer is 0.2-0.3.

[0034] Preferably, the substrate is an aluminum tube.

[0035] A fourth aspect of the present invention provides a method for preparing an organic photoconductor drum.

[0036] A method for preparing an organic photoconductive drum comprises the following steps:

[0037] The organic photoconductive drum is prepared by coating a barrier layer coating on the surface of the substrate and performing a first curing to obtain a barrier layer, coating a generating layer coating on the surface of the barrier layer and performing a second curing to obtain a generating layer, coating a conductive layer coating on the surface of the generating layer and performing a third curing to obtain a conductive layer.

[0038] Preferably, the temperature of the first curing is 100-250° C., and / or the time of the first curing is 1-20 min.

[0039] Preferably, the temperature of the second curing is 100-250° C., and / or the time of the second curing is 1-20 min.

[0040] Preferably, the temperature of the third curing is 100-250° C., and / or the time of the third curing is 1-20 min.

[0041] The conductive layer coating of the present invention can be quickly baked and cured, thereby reducing environmental pollution to the coating.

[0042] A fifth aspect of the present invention provides an application of an organic photoconductor drum.

[0043] The invention discloses an application of an organic photoconductive drum in the preparation of printers, copiers and cameras.

[0044] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0045] The coating for the conductive layer of the organic photoconductor drum provided by the present invention comprises a hole transport material, polycarbonate and polysilazane in a specific ratio, which helps to improve the mechanical properties and chemical stability of the conductive layer. The conductive layer of the organic photoconductor drum is further prepared by using the coating, which can maintain a low wear rate on the coating surface during long-term continuous printing tests (for example, when the number of printed pages is as high as 30,000 pages, the loss percentage is only 5.31%). At the same time, during long-term storage, the degradation and oxidative splitting of the surface coating of the organic photoconductor drum are significantly reduced, and the drum can be stably stored for at least 72 hours, thereby improving the printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 is a potential dark decay diagram of the organic photoconductor drum of Example 1 of the present invention;

[0047] Figure 2 is a diagram of the preliminary charging voltage value of Comparative Example 1;

[0048] Figure 3 This is a potential test diagram of the organic photoconductive drum of Example 1 of the present invention when the temperature is 27° C. and the relative humidity is RH85%;

[0049] Figure 4 This is a potential test diagram of the organic photoconductive drum of Comparative Example 1 at a temperature of 27° C. and a relative humidity of RH85%;

[0050] Figure 5 This is a diagram showing the printing effect of the organic photoconductive drum of Example 1 of the present invention;

[0051] Figure 6 This is a printing effect diagram of the organic photoconductive drum of Comparative Example 1;

[0052] Figure 7 This is a crack resistance test diagram of the coating surface of the organic photoconductor drum of Example 1 of the present invention;

[0053] Figure 8 This is a test diagram of the coating surface crack resistance of the organic photoconductor drum in comparative example 1. DETAILED DESCRIPTION

[0054] In order to make the technical scheme of the present invention more clearly understood by those skilled in the art, the following embodiments are listed for illustration. It should be pointed out that the following embodiments do not limit the protection scope of the present invention.

[0055] Unless otherwise specified, the raw materials, reagents or devices used in the following examples can be obtained from conventional commercial sources or by existing known methods.

[0056] The raw materials used in the following examples and comparative examples are as follows:

[0057] Polysilazane (IOTA 9150): purchased from Anhui IOTA Silicone Oil Co., Ltd., model IOTA 9150;

[0058] N,N'-diphenyl-N,N'-di(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine: purchased from Shanghai Furui Chemical Technology Co., Ltd., TPD.

[0059] Polycarbonate: purchased from Teijin Resins Business Headquarters, ts2050.

[0060] Oxytitanium phthalocyanine: purchased from Shanghai Fluorine Chemical Technology Co., Ltd., CG-100M.

[0061] Polyvinyl butyral: purchased from Sekisui Chemical Co., Ltd., bx-l.

[0062] Titanium dioxide: purchased from Ishihara Industry Co., Ltd., Japan, 55s.

[0063] Nylon resin: purchased from Toray, Japan, nylon 66, cm8000.

[0064] Example 1

[0065] A coating for a conductive layer of an organic photoconductive drum, comprising the following raw material components:

[0066] N,N'-diphenyl-N,N'-di(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine, polycarbonate, and polysilazane in a mass ratio of 0.81:1:0.1.

[0067] An organic photoconductive drum comprises a conductive layer, a generating layer, a barrier layer and a substrate which are stacked in sequence, wherein the raw materials for preparing each layer and their contents are as follows:

[0068] The raw materials for preparing the conductive layer include: N,N'-diphenyl-N,N'-di(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine, polycarbonate and polysilazane (IOTA 9150) in a mass ratio of 0.81:1:0.1;

[0069] The raw materials for preparing the generating layer include: oxytitanium phthalocyanine and polyvinyl butyral in a mass ratio of 1:0.55;

[0070] The raw materials for preparing the barrier layer include: titanium dioxide and nylon resin in a mass ratio of 1:0.8;

[0071] The base is: aluminum tube.

[0072] A method for preparing an organic photoconductive drum comprises the following steps:

[0073] (1) Preparation of barrier layer:

[0074] Weigh titanium dioxide (3.6kg) and nylon resin (2.88kg), put them into a ball mill, add 12kg of anhydrous ethanol and 20kg of ball milling balls (corundum beads), that is, the ball-to-material ratio (weight ratio) is 1:1.1, and carry out ball milling. The speed of the ball milling is 45 rpm, and the time is 48h. The obtained ball milling liquid and 15 kg of zirconium beads are placed in a sand mill for sand milling. The speed of the sand milling is 1300 rpm and the time is 2h. Use nitrogen to press the solution from the ball mill to obtain a barrier layer coating. Apply the barrier layer coating on the aluminum tube. After coating, place it in an oven and bake it at 120°C for 1h to obtain a barrier layer with a thickness of 2.5μm;

[0075] (2) Preparation of the generating layer:

[0076] Mix oxytitanium phthalocyanine (0.7kg) and polyvinyl butyral (0.385kg) evenly, stir and dissolve in ethylene glycol dimethyl ether (8kg) and place in a ball mill. Add 30kg of glass beads to the ball mill, start stirring, wait for 48 hours, press the solution to obtain the generating layer coating. Apply the generating layer coating on the barrier layer. After the coating is completed, place it in an oven and bake it at 120°C for 1 hour to obtain the generating layer. The absorbance of the obtained film is tested to be 0.16;

[0077] (3) Preparation of conductive layer:

[0078] Weigh N,N'-diphenyl-N,N'-di(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine (1.696kg), polycarbonate (2.094kg) and polysilazane (IOTA 9150) (0.209kg) and put them into a mixing container, then add solvent (tetrahydrofuran) (16kg) to mix and dissolve. Place the mixing container in a reactor, start the stirring device of the reactor, and stir at a constant speed to ensure that the components are evenly mixed and fully dissolved to form a uniform conductive layer coating solution. The stirring process should be carried out at a controlled temperature (50°C) and time (5h) to ensure the dissolution effect and the stability of the coating performance. After completion, the conductive layer coating solution is placed for a period of time to eliminate possible bubbles and make it suitable for the subsequent coating process. Use a coating machine to apply the conductive layer coating on the generating layer, and then bake it at 120°C for 1h to obtain a conductive layer with a thickness of 26μm to prepare an organic photoconductive drum.

[0079] Example 2

[0080] An organic photoconductive drum comprises a conductive layer, a generating layer, a barrier layer and a substrate which are stacked in sequence. The difference from Example 1 is that the mass ratio of N,N'-diphenyl-N,N'-di(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine, polycarbonate and polysilazane (IOTA 9150) is 0.81:1:0.12.

[0081] Example 3

[0082] An organic photoconductive drum comprises a conductive layer, a generating layer, a barrier layer and a substrate which are stacked in sequence. The difference from Example 1 is that the mass ratio of N,N'-diphenyl-N,N'-di(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine, polycarbonate and polysilazane (IOTA 9150) is 0.81:1:0.15.

[0083] Comparative Example 1

[0084] An organic photoconductive drum comprises a conductive layer, a generating layer, a barrier layer and a substrate which are stacked in sequence. The difference from Example 1 is that polysilazane (IOTA 9150) is not contained and polysilazane (IOTA 9150) is replaced by polycarbonate of equal mass.

[0085] Comparative Example 2

[0086] An organic photoconductive drum comprises a conductive layer, a generating layer, a barrier layer and a substrate which are stacked in sequence. The difference from Example 1 is that the mass ratio of N,N'-diphenyl-N,N'-di(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine, polycarbonate and polysilazane (IOTA 9150) is replaced with 0.81:1:0.3.

[0087] Comparative Example 3

[0088] An organic photoconductive drum comprises a conductive layer, a generating layer, a barrier layer and a substrate which are stacked in sequence. The difference from Example 1 is that the mass ratio of N,N'-diphenyl-N,N'-di(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine, polycarbonate and polysilazane (IOTA 9150) is replaced with 0.81:1:0.4.

[0089] Comparative Example 4

[0090] An organic photoconductive drum comprises a conductive layer, a generating layer, a barrier layer and a substrate which are stacked in sequence. The difference from Example 1 is that polysilazane is replaced by vinyl silicone resin of the same weight.

[0091] Comparative Example 5

[0092] An organic photoconductive drum comprises a conductive layer, a generating layer, a barrier layer and a substrate which are stacked in sequence. The difference from Example 1 is that the mass ratio of N,N'-diphenyl-N,N'-di(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine, polycarbonate and polysilazane (IOTA 9150) is replaced with 0.81:1:0.05.

[0093] Product effect testing

[0094] 1. Test methods

[0095] (1) Potential dark decay test: Using an OPC tester, the surface of the organic photoconductive drum prepared in each embodiment and comparative example was charged to a negative voltage of 700 volts by corona discharge, and maintained for 30 seconds in the absence of light, and the change of potential dark decay was recorded.

[0096] (2) PIDC test: Using an OPC tester, the surface of each organic photoconductor drum is charged to a negative voltage of 700 volts by corona discharge. Under 780 nm wavelength light, the exposure required to reduce the surface voltage of the organic photoconductor drum to 1 / 2, 1 / 5 and 100 volts of the original voltage is measured to obtain a PIDC characteristic curve.

[0097] (3) Printing effect and blackness test: The organic photoconductive drums prepared in the embodiments and comparative examples were respectively subjected to actual printing at 26° C., and then the blackness of the printing paper was measured using a blackness meter.

[0098] (4) Coating surface crack resistance test: The selected grease is evenly coated on the surface of the OPC prepared in each embodiment and comparative example. The coating method can be selected by a brush, dropper or sprayer to ensure that the grease covers the entire surface. The coating amount is moderate to form a thin layer of grease film. The coating method and coating thickness of each OPC are consistent. The sample coated with grease is placed in a dry environment for a certain period of time (72h) to ensure that the grease is fully attached and penetrated. Observe the occurrence and degree of cracks on the OPC surface.

[0099] (5) Actual machine wear test: The organic photoconductor drums prepared in each embodiment and comparative example were respectively installed in actual printers; long-term printing was performed under standard conditions, and the print volume was set to 30,000 pages; after printing, the organic photoconductor drum was taken out, and the thickness of the organic photoconductor drum coating was measured using a precision thickness gauge; the coating thickness before and after printing was recorded, and the coating loss was calculated; the wear resistance was analyzed, and the wear resistance and durability of the coating during long-term printing were evaluated.

[0100] 2. Test results

[0101] Figure 1 is the potential dark decay of the organic photoconductor drum in Example 1, Figure 2 The initial charging voltage value of the comparative example 1 is similar to the final drop rate of the two. Figure 3 and Figure 4 It can be seen that the difference in potential change between the organic photoconductive drums prepared in Example 1 and Comparative Example 1 is not significant when the temperature is 27°C and the relative humidity is RH85%. From the above test results, it can be seen that the difference between the actual printing process and the theoretical effect of the organic photoconductive drum in Example 1 is small. Figure 5 and Figure 6 From the comparison of the printing effects (both at a temperature of 27°C and a humidity of 85%RH), it can be seen that the organic photoconductive drums of Example 1 and Comparative Example 1 have similar performances in terms of printing resolution and blackness level. The measurement results of the blackness tester also prove that the blackness values ​​of the two are almost the same.

[0102] The above results show that the printing tests of Example 1 and Comparative Example 1 meet the market requirements, and Example 1 has better wear resistance and stability than Comparative Example 1.

[0103] Depend on Figure 7 and Figure 8 It can be seen that the coating surface of the organic photoconductor drum of Example 1 has fewer cracks, while the coating surface of Comparative Example 1 has severe cracks under the corrosion and oxidation of grease, indicating that the organic photoconductor drum of Example 1 of the present invention has stronger anti-oxidation and cracking performance.

[0104] The actual machine wear resistance test results of the organic photoconductive drums of Example 1 and Comparative Example 1 are shown in Table 1:

[0105] Table 1 Wear test results of organic photoconductive drums of Example 1 and Comparative Example 1

[0106]

[0107]

[0108] It can be clearly seen from the above table that in the actual machine wear resistance test, the coating loss percentage of Example 1 is significantly smaller than that of Comparative Example 1, indicating that the organic photoconductor drum conductive layer of Example 1 has excellent wear resistance.

[0109] Comparative Examples 2-3 all increased the amount of polysilazane used. Although the wear resistance was improved to a certain extent, the basic printing test failed and could not be used.

[0110] Comparative Example 4 changes the dielectric constant of the coating, resulting in insufficient blackness, poor exposure performance and poor printing effect.

[0111] Since the amount of polysilazane used in Comparative Example 5 is reduced, the wear resistance and chemical stability are not significantly different from those of the old product in Comparative Example 1.

Claims

1. An organic photoconductive drum, characterized in that: The invention comprises a substrate, a barrier layer, a generating layer and a conducting layer which are stacked in sequence, wherein the conducting layer is made of a coating for a conducting layer of an organic photoconductor drum, and the coating for a conducting layer of the organic photoconductor drum comprises the following raw material components: Hole transport material, polycarbonate, polysilazane in a mass ratio of 0.81:1:(0.1-0.15); The hole transport material is N,N'-diphenyl-N,N'-di(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine and / or 4-(2,2-diphenylvinyl)-N,N-di-p-tolylaniline; The polycarbonate was purchased from Teijin Resins Business Headquarters, model number ts2050; The polysilazane is IOTA 9150 polysilazane produced by Anhui IOTA Silicone Oil Co., Ltd. The raw materials for preparing the barrier layer include titanium dioxide and nylon resin; The organic photoconductive drum is prepared by the following preparation method: a barrier layer coating is coated on the surface of the substrate and first cured to obtain a barrier layer, a generator layer coating is coated on the surface of the barrier layer and second cured to obtain a generator layer, a conductive layer coating is coated on the surface of the generator layer and third cured to obtain a conductive layer, thereby preparing the organic photoconductive drum; The temperature of the third curing is 100-250° C., and / or the time of the third curing is 1-20 min.

2. The organic photoconductor drum according to claim 1, characterized in that: The coating for the conductive layer of the organic photoconductive drum comprises the following raw material components: A hole transport material, polycarbonate, and polysilazane in a mass ratio of 0.81:1:0.1, 0.81:1:0.11, 0.81:1:0.12, 0.81:1:0.13, 0.81:1:0.14, or 0.81:1:0.

15.

3. The organic photoconductor drum according to claim 1, characterized in that: The method for preparing the coating for the conductive layer of the organic photoconductive drum comprises the following steps: The hole transport material, polycarbonate, polysilazane and solvent are mixed to obtain a coating for a conductive layer of an organic photoconductor drum.

4. The organic photoconductor drum according to claim 3, characterized in that: The mixing temperature is 40-60° C., and / or the mixing time is 4-6 hours.

5. The organic photoconductor drum according to claim 1, characterized in that: The raw materials for preparing the generating layer include oxytitanium phthalocyanine and polyvinyl butyral.

6. The method for preparing an organic photoconductive drum according to any one of claims 1 to 5, characterized in that: The steps include: The organic photoconductive drum is prepared by coating a barrier layer coating on the surface of the substrate and performing a first curing to obtain a barrier layer, coating a generating layer coating on the surface of the barrier layer and performing a second curing to obtain a generating layer, coating a conductive layer coating on the surface of the generating layer and performing a third curing to obtain a conductive layer.

7. Use of the organic photoconductive drum according to any one of claims 1 to 5 in the preparation of printers, copiers and cameras.

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