JP3573405B2 - Electrophotographic photoreceptor, process cartridge and electrophotographic apparatus - Google Patents

Description

下記式のアミン化合物３重量部
【００３８】
【化２】

及びポリカーボネート樹脂（ユーピロンＺ２００、三菱瓦斯化学（株）製）１０重量部をモノクロロベンゼン３０重量部及びジクロロメタン７０部の混合溶媒に溶解した。この塗料を浸漬法で塗布し、１２０℃で２時間乾燥して、膜厚が２５μｍの電荷輸送層を形成した。
【００３９】
次に、上記の感光層を塗布した電子写真感光体の内面の端部から２０ｍｍの位置に、シアノアクリレート系瞬間接着剤を０．１ｇ周付けし、アルミニウム製円筒状詰め物（φ２８．４０ｍｍ、長さ６５ｍｍ）を感光体中央に挿入し、固定した。
【００４０】
その後、噴霧器により詰め物挿入側から純水を０．１５ｇ噴霧して、固定に必要としない瞬間接着剤や未硬化モノマーを硬化または吸着させ、更に、アース板を有した駆動部材と従動部材をカシメ結合させた。
【００４１】
このようにして得られた電子写真感光体を常温常湿環境（２３℃、５０％ＲＨ）に２４時間保管した後、レーザービームプリンタ（ＬＢＰ−ＥＸ、キヤノン（株）製）のプロセスカートリッジに装着して、１０台のプロセスカートリッジを作製した。
【００４２】
更に、これらを２４時間保管した後、評価として、プロセスカートリッジの外観検査と、レーザービームプリンタ本体への設置による１００００枚の画像出しを行った。その結果、１０台全てで白化の発生はなく、またアース不良による画像欠陥も認められず、非常に良好な画像が得られた。更に、耐久後、感光体を取り外し詰め物の緩みや外れを検査したが、充分な強度を維持していた。
【００４３】
［実施例２］
実施例１と同様の電子写真感光体の内面の端部から２０ｍｍの位置に、シアノアクリレート系瞬間接着剤を０．１５ｇ周付けし、プラスチック製円筒状詰め物（φ２８．４０ｍｍ、長さ１００ｍｍ）を感光体中央に挿入し、固定した。
【００４４】
その後、噴霧器により詰め物挿入側から純水を０．２ｇ噴霧した以外は、実施例１と同様にして電子写真感光体及びプロセスカートリッジを作製し、評価したところ、実施例１と同様の結果が得られた。
【００４５】
［比較例１］
詰め物挿入後の純水噴霧を行わなかった以外は、実施例１と同様にして電子写真感光体及びプロセスカートリッジを作製し、評価した。
【００４６】
その結果、軽微なものを含めると１０台全てのプロセスカートリッジに白化が発生した。画像出しの結果、１０台中７台が初期（１００枚程度）のアース不良により画像欠陥が発生した。
【００４７】
［比較例２］
詰め物挿入後の純水噴霧量を０．０８ｇとした以外は、実施例１と同様にして電子写真感光体及びプロセスカートリッジを作製し、評価した。
【００４８】
その結果、軽微なものを含めると１０台中３台のプロセスカートリッジに白化が発生した。画像出しの結果、１０台中２台が初期（１００枚程度）のアース不良により画像欠陥が発生した。
【００４９】
［比較例３］
詰め物挿入後の純水噴霧量を２．０ｇとした以外は、実施例１と同様にして電子写真感光体及びプロセスカートリッジを作製し、評価した。
【００５０】
その結果、プロセスカートリッジの白化の発生やアース不良による画像欠陥の発生は１０台共なかったが、耐久後、感光体を取り外し詰め物の緩みや外れを検査したところ、１０台中２台が外れていた。
【００５１】
上記実施例及び比較例の結果を表１に示す。
【００５２】
表１

【００５３】
【発明の効果】
以上のように、本発明によれば、瞬間接着剤による白化現象の発生がなく、プロセスカートリッジの外観及び機能面も高品位であり、アース不良のない良好な画像の得られる電子写真感光体、該電子写真感光体を有するプロセスカートリッジ及び電子写真装置が可能となった。
【００５４】
また、プロセスカートリッジに装着するまでの期間を大幅に短縮できると共に保管環境の制限もなく、更に保管スペースの減少等、生産性を向上することができた。
【図面の簡単な説明】
【図１】本発明の電子写真感光体の概略断面を示す図である。
【図２】本発明の電子写真感光体を有するプロセスカートリッジを有する電子写真装置の概略構成の例を示す図である。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electrophotographic photoreceptor, a process cartridge having the electrophotographic photoreceptor, and an electrophotographic apparatus, and more particularly, an electrophotographic photoreceptor having excellent productivity and improved conduction performance with a process cartridge for office equipment, and the like. The present invention relates to a process cartridge having the electrophotographic photosensitive member and an electrophotographic apparatus.
[0002]
[Prior art]
An electrophotographic photoreceptor is generally charged by a contact charging method on the inner surface of a cylindrical support in which various layers such as a photosensitive layer, an undercoat layer, a conductive layer and a protective layer are formed on the support by a method such as evaporation or coating. A padding of metal, plastic, rubber, etc. to reduce noise or chattering noise of blades is fixed with an adhesive, and a drive and driven member for rotating the photoconductor is bonded or pressed into both ends of the support. (See Japanese Patent Application Laid-Open No. 5-197321).
[0003]
As a method of bonding the padding, an appropriate amount of an adhesive is applied to an inserted portion of the inner surface of the support, a padding made of aluminum or the like is inserted to a predetermined position, and after the driving and driven members are joined, the adhesive is completely cured. Until then, it was stored in an environment at room temperature and an absolute humidity of 40% or more. As an adhesive used for bonding the filling, a cyanoacrylate-based instant adhesive was mainly used.
[0004]
In general, an earth plate made of copper or the like for discharging electric charges charged on the surface of the photoconductor is ultrasonically welded to an end of the driving or driven member.
[0005]
[Problems to be solved by the invention]
However, the above-mentioned conventional electrophotographic photoreceptor has some problems described below.
[0006]
(1) Since the instant adhesive that fixes the filling requires a long time of 72 hours or more to completely cure, equipment to secure storage space and control the temperature and humidity of the storage environment And the like, and there was a problem in cost, management, and productivity.
[0007]
(2) If the photoreceptor is attached to a cartridge or the like before the instant adhesive is completely cured, the uncured monomer that has evaporated adheres to other members, causing a phenomenon called whitening that stains the members white, resulting in poor appearance or poor appearance. Degradation was a problem.
[0008]
(3) While the instant adhesive is completely cured, a whitening phenomenon occurs on the ground plate mounted on the driving or driven member, and there has been a problem of poor conduction between the process cartridge and the ground plate tip. .
[0009]
SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, to improve productivity, and to provide a cylindrical electrophotographic photosensitive member having excellent conduction performance with a process cartridge and the like, a process cartridge having the electrophotographic photosensitive member, and an electrophotographic device. It is to provide a device.
[0010]
[Means for Solving the Problems]
That is, the present invention relates to a cylindrical electrophotographic photoreceptor having a photosensitive layer on a support, wherein the support is provided with a padding made of one of metal, plastic and rubber fixed on the inner surface with a cyanoacrylate adhesive. In the electrophotographic photoreceptor, a driving member and a driven member are coupled to both ends after the end, and one of the driving member and the driven member is a member having a ground plate.
The support has a filling made of one of metal, plastic, and rubber fixed on the inner surface with the cyanoacrylate adhesive, and before the driving member and the driven member are joined to both ends, pure water or pure water is fixed on the inner surface. Tap water is sprayed through the filter,
Spraying amount of tap water through the the pure water or filter electrophotography, characterized in that not more than 10 times the coating amount of the cyanoacrylate adhesive in the above coating amount of the cyanoacrylate adhesive on a weight basis It is a photoconductor.
[0012]
Further, the present invention is a process cartridge and an electrophotographic apparatus having the above electrophotographic photosensitive member.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the configuration of the electrophotographic photosensitive member used in the present invention will be described.
[0014]
The electrophotographic photoreceptor according to the present invention is a single-layer type in which the photosensitive layer contains a charge transporting substance and a charge generating substance in the same layer, or a charge transporting layer containing a charge transporting substance and a charge generating layer containing a charge generating substance. It is roughly divided into a laminated type with separate functions.
[0015]
The support to be used is only required to have conductivity, and examples thereof include a metal such as aluminum and stainless steel, or a metal provided with a conductive layer, paper, and plastic.
[0016]
When an image input is a laser beam such as a laser beam printer (LBP), a conductive layer may be provided for the purpose of preventing interference fringes due to scattering and covering a scratch on the support. This can be formed by dispersing a conductive powder such as carbon black or metal particles in a binder resin. The thickness of the conductive layer is preferably 5 to 40 μm, more preferably 10 to 30 μm.
[0017]
An intermediate layer having an adhesive function is provided thereon. Examples of the material for the intermediate layer include polyamide, polyvinyl alcohol, polyethylene oxide, ethyl cellulose, casein, polyurethane, and polyether urethane. These are dissolved in an appropriate solvent and applied. The thickness of the intermediate layer is preferably 0.05 to 5 μm, more preferably 0.3 to 1 μm.
[0018]
A charge generation layer is formed on the intermediate layer. Examples of the charge generation material used in the charge generation layer include selenium-tellurium, pyrylium and thiapyrylium dyes, phthalocyanine, anthantrone, dibenzopyrene quinone, trisazo, cyanine, disazo, monoazo, indigo, quinacridone and asymmetric quinocyanine pigments. No. In the case of a function-separated type, the charge generation layer comprises a homogenizer, an ultrasonic dispersion, a ball mill, a vibration ball mill, a sand mill, an attritor, and a roll mill containing the charge generation material together with a binder resin and a solvent in an amount of 0.3 to 4 times by weight. It is well dispersed by a method such as a liquid collision type high-speed dispersing machine, and the dispersion is applied and dried to form. The thickness of the charge generation layer is preferably 5 μm or less, more preferably 0.1 to 2 μm.
[0019]
The charge transport layer is formed by applying a coating material in which a charge transport material and a binder resin are dissolved in a solvent and drying the coating material. Examples of the charge transport material used include a triarylamine compound, a hydrazone compound, a stilbene compound, a pyrazoline compound, an oxazole compound, a triallylmethane compound, and a thiazole compound. These are combined with a binder resin in an amount of 0.5 to 2 times by weight, applied and dried to form a charge transport layer. The thickness of the charge transport layer is preferably 5 to 40 μm, and more preferably 15 to 30 μm.
[0020]
FIG. 1 is a sectional view of the electrophotographic photosensitive member of the present invention. In FIG. 1, 1 is an electrophotographic photosensitive member, 2 is a ground plate, 3 is a driving or driven member, and 4 is a padding.
[0021]
After the filling 4 such as metal is fixed to the inner surface of the electrophotographic photoreceptor 1 having the photosensitive layer with an instant adhesive, pure water or tap water passed through a filter is sprayed on the inner surface. A driving and driven member 3 having an earth plate 2 on one side for rotating the photoreceptor 1 is joined by a method such as bonding, press fitting, or caulking.
[0022]
The spray amount of tap water through pure water or a filter is in the range of not less than the amount of the adhesive applied to the padding and not more than 10 times the amount of the adhesive applied.
[0023]
FIG. 2 shows a schematic configuration of an electrophotographic apparatus having a process cartridge having the electrophotographic photosensitive member of the present invention.
[0024]
In the figure, reference numeral 11 denotes a drum-shaped electrophotographic photosensitive member of the present invention, which is rotated around an axis 12 at a predetermined peripheral speed in the direction of an arrow. In the rotation process, the photosensitive member 11 is uniformly charged with a predetermined positive or negative potential on its peripheral surface by the primary charging means 13, and then exposed from exposure means (not shown) such as slit exposure or laser beam scanning exposure. Light 14 is received. Thus, an electrostatic latent image is sequentially formed on the peripheral surface of the photoconductor 11.
[0025]
The formed electrostatic latent image is then subjected to toner development by the developing unit 15, and the developed toner developed image is transferred between the photoconductor 11 and the transfer unit 16 from a paper feeding unit (not shown) by rotation of the photoconductor 11. The image is sequentially transferred by the transfer unit 16 to the transfer material 17 taken out and fed synchronously.
[0026]
The transfer material 17 having undergone the image transfer is separated from the photoreceptor surface, introduced into the image fixing means 18 and subjected to image fixing, thereby being printed out of the apparatus as a copy.
[0027]
The surface of the photoreceptor 11 after the image transfer is cleaned and cleaned by removing the untransferred toner by the cleaning unit 19, and is further subjected to a static elimination process by the pre-exposure light 20 from the pre-exposure unit (not shown). Used for image formation. When the primary charging means 13 is a contact charging means using a charging roller or the like, pre-exposure is not always necessary.
[0028]
In the present invention, a plurality of components, such as the above-described electrophotographic photoreceptor 11, primary charging means 13, developing means 15, and cleaning means 19, are integrally combined as a process cartridge. May be detachably attached to a main body of an electrophotographic apparatus such as a copying machine or a laser beam printer. For example, at least one of the primary charging unit 13, the developing unit 15, and the cleaning unit 19 is integrally supported with the photoconductor 11 to form a cartridge, and the cartridge is detachably attached to the apparatus main body by using a guide unit such as the rail 22 of the apparatus main body. The process cartridge 21 can be used.
[0029]
When the electrophotographic apparatus is a copying machine or a printer, the exposure light 14 is reflected light or transmitted light from the original, or the original is read by a sensor, converted into a signal, and scanned by a laser beam performed in accordance with the signal. , Light emitted by driving the LED array, driving the liquid crystal shutter array, and the like.
[0030]
The electrophotographic photoreceptor of the present invention can be widely used not only for electrophotographic copying machines but also for electrophotographic applications such as laser beam printers, CRT printers, LED printers, liquid crystal printers, and laser plate making.
[0031]
【Example】
Hereinafter, description will be made according to examples.
[0032]
[Example 1]
An aluminum cylinder with a diameter of 30 mm and a length of 254 mm is used as a support, and a coating composed of the following materials is applied to the support by a dip coating method and thermally cured at 140 ° C. for 30 minutes to form a conductive layer having a thickness of 15 μm. did.
[0033]
Conductive pigment: SnO ₂ coated barium sulfate 10 parts by weight Resistance controlling pigment: titanium oxide 2 parts by weight Binder resin: phenolic resin 6 parts by weight Leveling material: silicone oil 0.001 part by weight Solvent: methanol, methoxypropanol 0.2 /0.8 20 parts by weight
Next, a solution obtained by dissolving 3 parts by weight of N-methoxymethylated nylon and 3 parts by weight of copolymerized nylon in a mixed solvent of 65 parts by weight of methanol and 30 parts by weight of n-butanol is applied thereon by dip coating, and dried. An intermediate layer having a thickness of 0.5 μm was formed.
[0035]
Next, titanium oxyphthalocyanine (TiOPc) 4 having strong peaks at 9.0 °, 14.2 °, 23.9 ° and 27.1 ° of Bragg angle 2θ ± 0.2 ° in CuKα characteristic X-ray diffraction. After 2 parts by weight of polyvinyl butyral (trade name: Esrec BM2, manufactured by Sekisui Chemical Co., Ltd.) and 60 parts by weight of cyclohexanone are dispersed for 4 hours by a sand mill using φ1 mm glass beads, 100 parts by weight of ethyl acetate are dispersed. In addition, a dispersion for a charge generation layer was prepared. This was applied by a dip coating method and dried to form a charge generation layer having a thickness of 0.3 μm.
[0036]
Next, 7 parts by weight of an amine compound represented by the following formula,
[0037]
Embedded image

3 parts by weight of an amine compound represented by the following formula:
Embedded image

And 10 parts by weight of a polycarbonate resin (Iupilon Z200, manufactured by Mitsubishi Gas Chemical Co., Ltd.) were dissolved in a mixed solvent of 30 parts by weight of monochlorobenzene and 70 parts by weight of dichloromethane. This paint was applied by a dipping method and dried at 120 ° C. for 2 hours to form a charge transport layer having a thickness of 25 μm.
[0039]
Next, 0.1 g of a cyanoacrylate-based instant adhesive was wrapped around a position 20 mm from the end of the inner surface of the electrophotographic photoreceptor coated with the above-mentioned photosensitive layer to form an aluminum cylindrical filling (φ28.40 mm, length (65 mm) was inserted into the center of the photoreceptor and fixed.
[0040]
Thereafter, 0.15 g of pure water is sprayed from the filling insertion side with a sprayer to cure or adsorb the instant adhesive and uncured monomer which are not required for fixing, and further, the driving member and the driven member having the ground plate are caulked. Combined.
[0041]
The electrophotographic photosensitive member thus obtained is stored in a normal temperature and normal humidity environment (23 ° C., 50% RH) for 24 hours, and then is mounted on a process cartridge of a laser beam printer (LBP-EX, manufactured by Canon Inc.). Thus, ten process cartridges were manufactured.
[0042]
Further, after storing these for 24 hours, the appearance of the process cartridge was inspected and 10,000 images were output by installing the process cartridge in the main body of the laser beam printer. As a result, no whitening occurred in all of the 10 units, and no image defects due to poor grounding were observed, and very good images were obtained. Further, after the endurance, the photoreceptor was removed, and the looseness and detachment of the stuffing were inspected.
[0043]
[Example 2]
0.15 g of a cyanoacrylate-based instant adhesive is wrapped around a position 20 mm from the inner end of the same electrophotographic photosensitive member as in Example 1, and a plastic cylindrical filling (φ28.40 mm, length 100 mm) is placed. It was inserted into the center of the photoreceptor and fixed.
[0044]
Thereafter, an electrophotographic photosensitive member and a process cartridge were prepared and evaluated in the same manner as in Example 1 except that 0.2 g of pure water was sprayed from the filling insertion side by a sprayer, and the same results as in Example 1 were obtained. Was done.
[0045]
[Comparative Example 1]
An electrophotographic photosensitive member and a process cartridge were prepared and evaluated in the same manner as in Example 1 except that pure water spraying after inserting the filling was not performed.
[0046]
As a result, whitening occurred in all ten process cartridges including minor ones. As a result of image output, image defects occurred in 7 out of 10 units due to an initial (about 100) ground defect.
[0047]
[Comparative Example 2]
An electrophotographic photoreceptor and a process cartridge were prepared and evaluated in the same manner as in Example 1 except that the amount of pure water spray after filling was set to 0.08 g.
[0048]
As a result, whitening occurred in three out of ten process cartridges including minor ones. As a result of image display, image defects occurred in two of the ten units due to an initial (about 100) ground defect.
[0049]
[Comparative Example 3]
An electrophotographic photoreceptor and a process cartridge were prepared and evaluated in the same manner as in Example 1 except that the amount of pure water spray after the filling was changed to 2.0 g.
[0050]
As a result, no occurrence of whitening of the process cartridge or occurrence of image defects due to grounding failure was found in any of the ten cartridges. .
[0051]
Table 1 shows the results of the above Examples and Comparative Examples.
[0052]
Table 1

[0053]
【The invention's effect】
As described above, according to the present invention, there is no occurrence of whitening due to the instantaneous adhesive, the appearance and functional surface of the process cartridge are high-quality, and an electrophotographic photoreceptor capable of obtaining a good image without a ground defect, A process cartridge and an electrophotographic apparatus having the electrophotographic photosensitive member have become available.
[0054]
Further, the period until the process cartridge is mounted can be greatly reduced, the storage environment is not limited, and the storage space can be reduced and the productivity can be improved.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic cross section of an electrophotographic photosensitive member of the present invention.
FIG. 2 is a diagram illustrating an example of a schematic configuration of an electrophotographic apparatus having a process cartridge having an electrophotographic photosensitive member according to the present invention.

Claims (3)

A cylindrical electrophotographic photoreceptor having a photosensitive layer on a support, wherein the support is driven to both ends after a padding made of one of metal, plastic and rubber is fixed on the inner surface with a cyanoacrylate adhesive. An electrophotographic photoreceptor, wherein the member and the driven member are a combined support, and one of the driving member and the driven member is a member having a ground plate.
The support has a filling made of one of metal, plastic, and rubber fixed on the inner surface with the cyanoacrylate adhesive, and before the driving member and the driven member are joined to both ends, pure water or pure water is fixed on the inner surface. Tap water is sprayed through the filter,
Spraying amount of tap water through the the pure water or filter electrophotography, characterized in that not more than 10 times the coating amount of the cyanoacrylate adhesive in the above coating amount of the cyanoacrylate adhesive on a weight basis Photoconductor. 2. The electrophotographic photosensitive member according to claim 1, and at least one unit selected from the group consisting of a charging unit, a developing unit, and a cleaning unit are integrally supported, and are detachably attached to an electrophotographic apparatus main body. And process cartridge. An electrophotographic apparatus comprising the electrophotographic photosensitive member according to claim 1, a charging unit, an exposing unit, a developing unit, and a transferring unit.

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