JP4142916B2 - Electrophotographic photosensitive member support, electrophotographic photosensitive member, and image forming apparatus - Google Patents

Description

【００４２】
下記のＮ−メチルカルバゾールジフェニルヒドラゾン６重量部、
【化２】

【００４３】
下記のシアノ化合物１重量部、
【化３】

【００４４】
３，５-ジ- t ブチル-４-ヒドロキシトルエン（以下、ＢＨＴと略する）１６部及び、特開平３−２２１９６２号公報の実施例中に記載された製造法により製造された、２つの繰り返し構造単位を有する下記ポリカーボネート樹脂（モノマーモル比１：１）１００部
【００４５】
【化４】

【００４６】
をトルエン、テトラヒドロフランの混合溶媒に溶解させ、電荷輸送層塗布液とした。
【００４７】
（実施例１）ＪＩＳ６０６３合金からなる押出管に冷間引抜加工を施し、さらに切断して、外径φ３０．５ｍｍ、内径φ２８ｍｍ、長さ３４２ｍｍを作製した。この引抜管を両端加工機にてインロー加工を施した。次にこの素管を精密旋盤にセットし、回転数２０００ｒｐｍ、送り０．３ｍｍの条件で、切り込み量０．２２５ｍｍの粗切削加工を施した。このときの粗切削後の振れは０．０１５ｍｍであった。最後に回転数３０００ｒｐｍ、送り０．３ｍｍの条件で切り込み量０．０２５ｍｍの仕上げ切削加工を実施した。
このようにして作製した基体の振れを測定したところ０．００７ｍｍであった。尚、前記振れは（株）キーエンス製レーザーＬＳ５０４０により測定した。
【００４８】
（参考例）粗切削後の振れが０．０１９ｍｍであり、仕上げ加工後の振れが０．０１０ｍｍであること以外は実施例１と同様に電子写真感光体用支持体を得た。
【００４９】
（比較例１）粗切削後の振れが０．０２５ｍｍであり、仕上げ加工後の振れが０．０１８ｍｍであること以外は実施例１と同様に電子写真感光体用支持体を得た。
【００５０】
上記、実施例及び比較例において製造された電子写真感光体用支持体に、陽極酸化処理にて陽極酸化被膜（アルマイト）６μｍを形成した上に、上記の電荷発生層及び電荷輸送層を順次積層し、電子写真感光体を製造した。
【００５１】
該電子写真感光体を多重現像方式でフルカラー印刷を行った結果、実施例で作製した支持体を用いた感光体を搭載した場合は、画像ズレのない良好な画像が得られたが、比較例で作製した支持体を用いた感光体を搭載した場合は、各色の印字位置にわずかなずれを生じていた。
【００５２】
【発明の効果】
本発明の支持体は、粗切削加工後の振れをコントロールすることによって、寸法精度の良い、振れの小さい高精度な支持体である。また、本発明の支持体を用いて感光体を作製し、画像を形成すると、非常に良好な画像を得ることが出来る。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a support for an electrophotographic photosensitive member. In particular, the present invention relates to a support for an electrophotographic photosensitive member suitable for full color printing, which requires high substrate dimensional accuracy.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an electrophotographic photosensitive member in an image forming apparatus such as an electrophotographic copying machine, a laser beam printer, a facsimile, or a printing machine is a support for an electrophotographic photosensitive member (hereinafter referred to as a support) that has been finished to a predetermined surface roughness. However, when the dimensional accuracy of the support is low, the photosensitive layer is uneven, and as a result, the image obtained by the image forming apparatus is defective. Therefore, in order to obtain an image forming apparatus free from image defects, it is necessary to increase the dimensional accuracy of the support.
[0003]
Therefore, in the invention described in Japanese Patent Application Laid-Open No. 2-110570, after extruding and drawing, applying an inlay to a metal base tube cut to a predetermined length, an outer surface is cut, and a predetermined A method of finishing to a surface roughness has been proposed. With this method, it was possible to sufficiently achieve a runout accuracy of 100 to 150 μm or less that was required in the past.
In addition, in the invention described in Japanese Patent Application Laid-Open No. 11-160901, a method is described in which a support having high dimensional accuracy is obtained by performing rough cutting on the outer surface of a metal base tube before inlay processing. However, in the invention, the number of steps for discarding is increased, resulting in an increase in cost.
[Problems to be solved by the invention]
[0004]
However, in recent applications such as full-color printing, misalignment of multi-colored images is a problem, and in order to pursue minimization of this misalignment, it is required to always supply a support with high dimensional accuracy. became.
[0005]
[Means for Solving the Problems]
As a result of various studies to provide a support capable of satisfying such requirements, the inventor of the present invention has found that the metal base tube after rough cutting has been processed in cutting when manufacturing a substrate for an electrophotographic photosensitive member. By controlling the runout, it was found that a high-precision support with high dimensional accuracy can be obtained as a metal blank after finishing cutting, that is, an electrophotographic photoreceptor support, and the present invention has been achieved. That is, the gist of the present invention is that, in a support for an electrophotographic photoreceptor produced by subjecting a metal tube to at least rough cutting and then finish cutting, the vibration of the metal tube after rough cutting is zero. .015mm Ri der less and deflection of metal tube after the finish machining resides in an electrophotographic photoreceptor support Ru der below 0.007 mm.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail. The metal element tube of the present invention is not limited as long as it is a metal element tube that can be used for a conductive support for an electrophotographic photosensitive member, but an aluminum material is preferable. The aluminum material in the present invention refers to aluminum or an aluminum alloy.
[0007]
The metal base tube is usually processed into a cylindrical shape by extrusion processing such as a porthole method, a mandrel method, etc., and then formed into a cylinder having a predetermined thickness, length, outer diameter, and so on. It is manufactured by performing processing according to the above. Usually, a thin-walled and high-precision raw tube cannot be obtained only by extrusion processing, and therefore drawing is performed. Since the drawing process is performed at room temperature, it can be processed with higher accuracy than the extrusion process. The drawing rate of drawing (ratio of the length after processing to the length before processing) is usually 1.1 to 1.4. Drawing is performed by installing a die called a die on the inner diameter side and a die called a die on the outer diameter side, and extending the inner diameter and the outer diameter at the same time. Cause. In addition, the cutting process is performed in order to align the raw tube to a predetermined length.
[0008]
The cylindrical metal tube thus obtained is cut. The cutting is generally performed in the order of inlay processing, outer surface cutting processing (rough cutting processing and then finishing cutting processing). As in the invention described in Japanese Patent Application Laid-Open No. 11-160901, rough cutting (outer surface cutting) can be performed before inlay processing. In the present invention, it is always possible to obtain a high-precision metal base tube after finish cutting by setting the runout of the metal base tube after rough cutting performed before finish cutting to 0.015 mm or less. it can.
[0009]
In the present invention, deflection of the metal tube after the rough machining it is important that at most 0.015 mm, in order to obtain such a blank tube is, extruded as described above, further drawing processing For example, the raw pipe is placed on a precision lathe device, and a feed pitch in the range of 0.2 to 0.5 mm / rev at a rotation speed of 1000 to 5000 rpm using an R tool having a nose radius of 1 to 10 mm. These conditions can be obtained by performing rough cutting by selecting appropriate conditions from the range of 100 to 500 μm.
[0010]
Here, the runout in the present invention is a runout on the basis of the outer circumference, and about 5 mm at both ends of the raw tube is received by the rollers, and the axis in an arbitrary cross section when the tube is rotated once based on the rolls. It is the maximum value of displacement in a direction perpendicular to the direction. Moreover, the metal blank after the finish cutting means a completed support for an electrophotographic photosensitive member. In the present invention, it is always possible to achieve a runout after finishing cutting of 0.007 mm or less by setting the runout of the metal tube after rough cutting to 0.015 mm or less.
[0011]
The details of the cutting process will be described. The inlay process is a process in which the inner part of the metal base tube is cut to form a step part (inlay part) to which the flange is to be attached. Accordingly, the thickness and depth to be reduced are determined in accordance with the outer diameter and height of the flange to be mounted, and the inlay portion is formed. The inlay processing is preferably simultaneous processing at both ends in order to make the coaxiality, the perpendicularity of the end face, etc. highly accurate. As a machine for this purpose, a both-end processing machine is used, and a method is adopted in which the outer side or the inner side of the metal base tube is held by a collet chuck and the metal base tube or the cutter is rotated for processing.
[0012]
The outer surface cutting of the metal pipe is usually performed in two stages: rough cutting and finish cutting. These external cuttings use fluid bearings or solid bearings, and a precision lathe that prevents vibration as much as possible is used. This is because the surface state of the metal tube formed by cutting directly affects the characteristics of the electrophotographic photosensitive member. The rough cutting is performed with a nose R of a single crystal of natural diamond having a cutting depth of 100 to 800 μm using a 10 or less bite. In the present invention, in order to ensure the accuracy after the rough cutting process, the hitting of the cutting tool is adjusted so as to reduce the cutting resistance during the rough cutting process. After rough cutting, finish cutting is performed. Usually, since the surface shape or dimensional accuracy of the support is influenced by the finish cutting, the finish cutting must be performed precisely.
[0013]
However, in the present invention, since a support having high dimensional accuracy can be obtained by controlling the runout after the rough cutting process, the rough surface shape of the substrate may be processed mainly in the finish cutting process. The finish cutting is performed using a natural diamond single crystal or sintered bit with a notch of 20 to 30 μm.
[0014]
The electrophotographic photoreceptor support prepared as described above may form a photosensitive layer as it is on the support, but the blocking layer is used to improve the appearance after coating the photosensitive layer and to prevent density unevenness. It is preferable to form a photosensitive layer on the substrate. Here, the blocking layer refers to an anodized film or an undercoat layer.
[0015]
The anodized film is formed by anodizing the surface of the support. Prior to the anodizing treatment, it is preferable to perform a degreasing treatment by various degreasing cleaning methods such as acid, alkali, organic solvent, surfactant, emulsion, electrolysis and the like. An anodized film is formed by an anodizing treatment in an ordinary method, for example, an acidic bath such as chromic acid, sulfuric acid, oxalic acid, boric acid, sulfamic acid, etc. Give good results. In the case of anodizing treatment in sulfuric acid, the sulfuric acid concentration is 100 to 300 g / l, the dissolved aluminum concentration is 2 to 15 g / l, the liquid temperature is 0 to 30 ° C., the electrolysis voltage is 10 to 20 V, and the current density is 0.5. It is preferably set within the range of ˜2 A / dm ² , but is not limited thereto. The thickness of the anodic oxide film thus formed is usually 20 μm or less, preferably 10 μm or less, more preferably 7 μm or less.
[0016]
The anodized support can be sealed or dyed. The sealing treatment is a step of sealing by growing aluminum hydroxide or the like in the porous layer. The sealing treatment method may be a normal method, but is preferably performed by dipping in a liquid containing nickel ions (for example, a liquid containing nickel acetate or a liquid containing nickel fluoride). Moreover, when performing a dyeing | staining process, a support body is immersed in an organic and inorganic compound salt solution, and those salts are adsorbed. Specifically, it is carried out under conditions such as azo-based water-soluble organic dyes 1 to 10 g / l, liquid temperature 20 to 60 ° C., pH 3 to 9, and immersion time 1 to 20 minutes.
[0017]
As the undercoat layer, organic layers such as polyvinyl alcohol, casein, polyvinyl pyrrolidone, polyacrylic acid, celluloses, gelatin, starch, polyurethane, polyimide, and polyamide can be used. Of these, a polyamide resin having excellent adhesion to the substrate and low solubility in the solvent used in the charge generation layer coating solution is preferable. In the undercoat layer, it is effective to contain fine metal oxide particles such as alumina and titania and organic or inorganic pigments.
[0018]
If the thickness of the undercoat layer is too thick, the performance of the photoreceptor is adversely affected. Therefore, a thickness of less than 20 μm is desirable, but a thickness of about 10 μm is more preferable, and application failure is less likely to occur. In addition, the undercoat layer has a higher viscosity and a lower transparency makes it difficult to pick up defects in the base. In the present invention, an undercoat layer can be formed on the anodic oxidation treatment, sealing treatment, dyeing treatment and the like.
[0019]
A photosensitive layer is formed on the support. As the photosensitive layer, an inorganic photosensitive layer or an organic photosensitive layer is used, but it is preferable to form an organic photosensitive layer on the support of the present invention. As the photosensitive layer, a layer in which a charge generation layer containing a charge generation material and a charge transport layer are laminated in this order, a layer in which layers are reversed, or a so-called single layer type in which charge generation material particles are dispersed in a charge transport medium are used. However, a laminated photosensitive layer having a charge generation layer and a charge transport layer is preferred. When the photosensitive layer has a single layer structure, a known material in which a photosensitive material is dispersed in a binder material is used. Examples thereof include a dye-sensitized ZnO photosensitive layer, a CdS photosensitive layer, and a photosensitive layer in which a charge generation material is dispersed in a charge transport material.
[0020]
The charge generation layer includes a charge generation material and a binder resin. The charge generation material is not particularly limited as long as it is a material used for an electrophotographic photosensitive member. Specifically, selenium and its alloys, arsenic-selenium, cadmium sulfide, zinc oxide, and other inorganic photoconductors. Organic pigments such as phthalocyanine, azo, quinacridone, polycyclic quinone, perylene, indigo, and benzimidazole can be used. In particular, metals such as copper, indium chloride, potassium chloride, tin, oxytitanium, zinc, vanadium, or phthalocyanine pigments such as metal-free phthalocyanines or metal-free phthalocyanines, or monoazo, bisazo, Azo pigments such as trisazo and polyazos are preferred. Of these, phthalocyanine pigments are particularly preferred, and oxytitanium phthalocyanine having a specific crystal system is particularly preferred. This is because oxytitanium phthalocyanine is more susceptible to crystal conversion by heat than ordinary pigments.
[0021]
Examples of such oxytitanium phthalocyanine include those showing a maximum diffraction peak at a Bragg angle (2θ ± 0.2 °) of 27.3 ° in X-ray diffraction by CuKα rays, but are not limited thereto. is not. The crystal form of oxytitanium phthalocyanine is generally called Y type or D type. For example, FIG. 2 of Japanese Patent Application Laid-Open No. 62-67094 (referred to as type II in the same publication). Fig. 1 of JP-A-2-8256, Fig. 1 of JP-A-64-82045, Journal of Electrophotographic Society Vol. 92 (issued in 1990), No. 3, pages 250-258 (the same publication) Is referred to as Y-type). This crystalline oxytitanium phthalocyanine is characterized by having a maximum diffraction peak at 27.3 °, but normally has peaks at 7.4 °, 9.7 °, and 24.2 °.
[0022]
The intensity of the diffraction peak may vary depending on the crystallinity, the orientation of the sample, and the measurement method. However, in the measurement by the Bragg-Brentano concentration method usually used when performing X-ray diffraction of a powder crystal, Type oxytitanium phthalocyanine has a maximum diffraction peak at 27.3 °. In addition, when measured by a thin film optical system (generally called thin film method or parallel method), 27.3 ° may not be the maximum diffraction peak depending on the state of the sample. This is probably because it is oriented in the direction.
[0023]
The dispersion medium is not particularly limited as long as it is used in the production process of the electrophotographic photosensitive member, and various solvents may be used. For example, ethers such as diethyl ether, dimethoxyethane, tetrahydrofuran and 1,2-dimethoxyethane; ketones such as acetone, methyl ethyl ketone and cyclohexanone; esters such as methyl acetate and ethyl acetate; alcohols such as methanol, ethanol and propanol Aromatic hydrocarbons such as toluene and xylene can be used alone or in admixture of two or more. The amount of the dispersion medium to be used can be any amount as long as the dispersion can be sufficiently dispersed and an effective amount of the charge generation material is contained in the dispersion, and is usually 3 to 20 wt as the concentration of the charge generation material in the dispersion during dispersion. %, More preferably about 4 to 20 wt%.
[0024]
The binder resin is not particularly limited as long as it is used for an electrophotographic photoreceptor, and specifically, polyvinyl butyral, polyvinyl acetal, polyester, polycarbonate, polystyrene, polyarylate, polysulfone, polyimide, Vinyl polymers such as polymethyl methacrylate and polyvinyl chloride, and copolymers thereof, phenoxy, epoxy, silicone resins, etc., and partially crosslinked cured products thereof can be used singly or in combination. As a method for mixing the binder resin and the charge generation material, for example, a method of dispersing the charge generation material in a dispersion treatment step while the binder resin is powdered or adding a polymer solution thereof, and dispersing the dispersion liquid obtained in the dispersion treatment step as a binder. Any method such as a method of mixing in a polymer solution of a resin or a method of mixing a polymer solution in a dispersion may be used.
[0025]
Next, the dispersion obtained here may be diluted with various solvents in order to obtain liquid properties suitable for coating. As such a solvent, the solvent illustrated as the said dispersion medium can be used, for example. The ratio between the charge generation material and the binder resin is not particularly limited, but generally the charge generation material is used in the range of 5 to 500 parts by weight with respect to 100 parts by weight of the resin. Moreover, a charge transport material can be included as required. Examples of charge transport materials include electron-withdrawing materials such as organic polymer compounds such as polyvinyl carbazole, polyvinyl pyrene, and polyacenaphthylene, fluorenone derivatives, tetracyanoxydimethane, benzoquinone derivatives, naphthoquinone derivatives, anthraquinone derivatives, and diphenoquinone derivatives. , Carbazole, indole, imidazole, oxazole, pyrazole, oxadiazole, pyrazoline, thiadiazole, etc. Examples thereof include an electron donating substance such as a polymer in the chain. The ratio of the charge transport material to the binder resin is such that the charge transport material is 5 to 500 parts by weight with respect to 100 parts by weight of the binder resin.
[0026]
Using the dispersion thus prepared, a charge generation layer is formed on a support having at least an undercoat layer, and a charge transport layer is laminated thereon to form a photosensitive layer, or charge Either a transport layer is formed and a charge generation layer is formed thereon using the dispersion liquid to form a photosensitive layer, or a charge generation layer is formed using the dispersion liquid to form a photosensitive layer. A photosensitive layer can be formed. When the charge generating layer is laminated with the charge transport layer to form a photosensitive layer, the range of 0.1 to 10 μm is preferable, and the thickness of the charge transport layer is preferably 10 to 40 μm. When forming the photosensitive layer with a single layer structure, the thickness of the photosensitive layer is preferably in the range of 5 to 40 μm.
[0027]
The charge transport layer is mixed with a known polymer having excellent performance as a binder resin on the charge generation layer and dissolved in a suitable solvent together with the charge transport material, and if necessary, an electron withdrawing compound, or It can be produced by applying a coating liquid obtained by adding a plasticizer, a pigment and other additives.
[0028]
As the charge transport material in the charge transport layer, the charge transport materials described above can be used. Various known resins can be used as the binder resin used together with the charge transport material. Thermoplastic resins and curable resins such as polycarbonate resin, polyester resin, polyarylate resin, acrylic resin, methacrylate resin, styrene resin, and silicone resin can be used. In particular, polycarbonate resins, polyarylate resins, and polyester resins that cause less wear and scratches are preferable. The polycarbonate resin can use bisphenol A, bisphenol C, bisphenol P, bisphenol Z, or various known components as its bisphenol component. Moreover, the copolymer which consists of these components may be sufficient. The mixing ratio of the charge transport material and the binder resin is, for example, 10 to 200 parts by weight, preferably 30 to 150 parts by weight, based on 100 parts by weight of the binder resin. In the case of a multilayer photoreceptor, the charge transport layer is formed with the above components as the main component.
[0029]
Solvents used for the coating solution for the charge transport layer include ethers such as tetrahydrofuran, 1,4-dioxane, 1,2-dimethoxyethane and anisole; ketones such as methyl ethyl ketone, 2,4-pentanedione and cyclohexanone; toluene, Aromatic hydrocarbons such as xylene; Esters such as ethyl acetate, methyl formate and dimethyl malonate; Ether esters such as 3-methoxybutyl acetate and propylene glycol methyl ether acetate; Chlorinated hydrocarbons such as dichloromethane and dichloroethane Can be mentioned. Of course, one or more of these may be selected and used. Preferably, it is selected from tetrahydrofuran, 1,4-dioxane, 2,4-pentanedione, anisole, toluene, dimethyl malonate, 3-methoxybutyl acetate, and propylene glycol methyl ether acetate.
[0030]
Further, the photosensitive layer of the electrophotographic photoreceptor of the present invention contains a well-known plasticizer, antioxidant, ultraviolet absorber and leveling agent in order to improve the film formability, flexibility, coatability and mechanical strength. It may be. Furthermore, an overcoat layer may be provided on the photosensitive layer in order to improve mechanical properties and gas resistant properties such as ozone and NOx. Furthermore, it goes without saying that an adhesive layer, an intermediate layer, a transparent insulating layer, and the like may be provided as necessary.
[0031]
In the present invention, the coating operation for forming each of the layers follows a conventionally known coating method. For example, a dip coating method, a spray coating method, a spinner coating method, a blade coating method, or the like can be employed.
[0032]
Examples of the image forming apparatus of the present invention include a monochrome printer, a copying machine, a color printer, a color copying machine, and a facsimile. In particular, the support and the electrophotographic photosensitive member of the present invention are suitable for a high-resolution image forming apparatus because they can provide a high-quality image without density unevenness. In particular, it can also be used in an image forming apparatus that obtains an image having a resolution of 600 dpi or more.
[0033]
In an image forming apparatus using a photoreceptor using the support of the present invention, the effect of the present invention can be obtained by using a light source such as a laser beam having a conventionally known wavelength range. Even in the image forming apparatus using a light source having a wavelength range of 380 nm to 600 nm, the effect of the present invention is considered to be achieved.
[0034]
The image forming apparatus includes a charging unit that uniformly charges the photoreceptor, an exposure unit that forms an electrostatic latent image by dissipating the charge of the exposed portion by exposing the photoreceptor to an image, and a charging unit. A developing unit that visualizes and develops the electrostatic latent image by attaching the toner that has been applied, a transfer unit that transfers the obtained visible image onto a transfer material such as transfer paper, and the like that can be visualized by heating, pressing, etc. A fixing unit for fixing the image on the transfer material and a cleaning unit for removing the toner remaining on the surface of the photoreceptor after the toner transfer to the transfer material are provided. In some cases, a charge eliminating unit is provided for removing charges remaining on the surface of the photoreceptor after cleaning. Furthermore, a transport unit for transporting the recording medium (paper) is provided.
[0035]
In the image forming apparatus of the present invention, as the charger, a non-contact charger such as a corona charger represented by a corotron or a scorotron; a contact charger such as a charging roller or a charging brush is used. The exposure is performed by using a light source such as a halogen lamp, a fluorescent lamp, a laser (semiconductor, He—Ne), an LED, or the like by an ordinary exposure method from the outside of the photoconductor, an exposure method from the inside of the photoconductor, or the like. Further, the development is performed by cascade development, contact development or non-contact development using a non-magnetic one-component toner, contact development or non-contact development using a magnetic one-component toner, two-component magnetic brush development, or a wet development method using a liquid toner. Done. Transfer is performed by electrostatic transfer methods such as corona transfer, roller transfer, and belt transfer, pressure transfer method, and adhesive transfer method, and fixing is performed by heat roller fixing, flash fixing, oven fixing, pressure fixing, and the like. The cleaning is performed by brush cleaning, magnetic brush cleaning, electrostatic brush cleaning, magnetic roller cleaning, blade cleaning, or the like.
[0036]
As for the image forming apparatus, when full color printing is performed, a developer such as toner adhered on the electrophotographic photosensitive member is once transferred to one intermediate transfer belt, and toner of each color is formed in the form of an intermediate transfer belt. In addition, after forming a color visible image, a color image may be formed on a recording medium (paper) using a transfer unit.
[0037]
【Example】
EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to a following example, unless the summary is exceeded.
[0038]
(Preparation of coating solution for charge generation layer)
[Dispersion Q1]
In X-ray diffraction spectrum, Bragg angle (2θ ± 0.2 °) 9.3 °, 10.6 °, 13.2 °, 15.1 °, 15.7 °, 16.1 °, 20.8 ° , 10 parts by weight of oxytitanium phthalocyanine having main diffraction peaks at 23.3 °, 26.3 ° and 27.1 ° are added to 150 parts by weight of 1,2-dimethoxyethane, and are pulverized and dispersed by a sand grind mill. Liquid Q1 was produced.
[0039]
[Dispersion Q2]
In the X-ray diffraction spectrum, except that oxytitanium phthalocyanine having main diffraction peaks at Bragg angles (2θ ± 0.2 °) of 9.7 °, 24.2 °, and 27.3 ° was used, the same as the dispersion Q1 Dispersion liquid Q2 was thus prepared.
[0040]
48 parts by weight of dispersion Q1 prepared in advance and 112 parts by weight of dispersion Q2 were mixed, and 160 parts by weight of the obtained pigment dispersion was added to polyvinyl butyral (manufactured by Electrochemical Industry Co., Ltd., trade name # 6000- In addition to 100 parts by weight of a 5% 1,2-dimethoxyethane solution of C), a coating solution for a charge generation layer which was a dispersion having a solid content concentration of 4.0% was finally prepared.
[0041]
(Preparation of coating solution for charge transport layer)
54 parts by weight of the following N, N-di-p-tolylaniline diphenylhydrazone and

[0042]
6 parts by weight of the following N-methylcarbazole diphenylhydrazone,
[Chemical 2]

[0043]
1 part by weight of the following cyano compound,
[Chemical 3]

[0044]
16 parts of 3,5-di-t-butyl-4-hydroxytoluene (hereinafter abbreviated as BHT) and two repetitions produced by the production method described in the examples of JP-A-3-221196 100 parts of the following polycarbonate resin having a structural unit (monomer molar ratio 1: 1)
[Formula 4]

[0046]
Was dissolved in a mixed solvent of toluene and tetrahydrofuran to prepare a charge transport layer coating solution.
[0047]
(Example 1) An extruded tube made of JIS6063 alloy was subjected to cold drawing and further cut to produce an outer diameter of 30.5 mm, an inner diameter of 28 mm, and a length of 342 mm. The drawn tube was subjected to inlay processing with a both-end processing machine. Next, this raw tube was set on a precision lathe and subjected to rough cutting with a cutting depth of 0.225 mm under the conditions of a rotational speed of 2000 rpm and a feed of 0.3 mm. The runout after rough cutting at this time was 0.015 mm. Finally, finish cutting with a cut amount of 0.025 mm was performed under the conditions of a rotational speed of 3000 rpm and a feed of 0.3 mm.
The deflection of the substrate thus fabricated was measured and found to be 0.007 mm. The deflection was measured with a laser LS5040 manufactured by Keyence Corporation.
[0048]
Reference Example An electrophotographic photosensitive member support was obtained in the same manner as in Example 1 except that the runout after rough cutting was 0.019 mm and the runout after finishing was 0.010 mm.
[0049]
Comparative Example 1 A support for an electrophotographic photosensitive member was obtained in the same manner as in Example 1 except that the runout after rough cutting was 0.025 mm and the runout after finishing was 0.018 mm.
[0050]
On the electrophotographic photoreceptor support produced in the above Examples and Comparative Examples, an anodized film (alumite) of 6 μm was formed by anodizing, and the charge generation layer and the charge transport layer were sequentially laminated. Thus, an electrophotographic photosensitive member was produced.
[0051]
As a result of full-color printing of the electrophotographic photosensitive member by the multiple development method, when the photosensitive member using the support produced in the example was mounted, a good image without image misalignment was obtained. When the photoconductor using the support produced in (1) was mounted, a slight shift occurred in the printing position of each color.
[0052]
【The invention's effect】
The support according to the present invention is a high-precision support with good dimensional accuracy and small runout by controlling the runout after rough cutting. Further, when a photoconductor is prepared using the support of the present invention and an image is formed, a very good image can be obtained.

Claims (3)

At least rough machining the metal tube, then the electrophotographic photoreceptor support to be produced subjecting the finish machining, Ri shake der less 0.015mm of metal tube after the rough machining and finish machining an electrophotographic photoreceptor support metal tube shake Ru der less 0.007mm after. An electrophotographic photosensitive member obtained by forming a photosensitive layer on the support for an electrophotographic photosensitive member according to claim 1 . An image forming apparatus using the electrophotographic photosensitive member according to claim 2 .