JP2007224137A - Solid lubricant, lubricant feeder and electrophotographic image-forming apparatus - Google Patents

Solid lubricant, lubricant feeder and electrophotographic image-forming apparatus Download PDF

Info

Publication number
JP2007224137A
JP2007224137A JP2006046581A JP2006046581A JP2007224137A JP 2007224137 A JP2007224137 A JP 2007224137A JP 2006046581 A JP2006046581 A JP 2006046581A JP 2006046581 A JP2006046581 A JP 2006046581A JP 2007224137 A JP2007224137 A JP 2007224137A
Authority
JP
Japan
Prior art keywords
solid lubricant
lubricant
forming apparatus
fine powder
image forming
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2006046581A
Other languages
Japanese (ja)
Inventor
Kenji Seki
謙二 関
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP2006046581A priority Critical patent/JP2007224137A/en
Publication of JP2007224137A publication Critical patent/JP2007224137A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Cleaning In Electrography (AREA)
  • Lubricants (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solid lubricant which maintains a constant scraped amount even when the manufacturing method and the manufacturing conditions are different or even when lot-to-lot variation of raw materials is caused and can be uniformly fed to an image carrier, and an electrophotographic image-forming apparatus. <P>SOLUTION: The solid lubricant (50) is used in lubricating the surface of an image carrier (1) in an elecrophotographic image-forming apparatus, and the solid lubricant surface is scraped off by a brush roll (51) of a lubricant feed member, and the scraped solid lubricant is fed to the image carrier (1), and the solid lubricant comprises zinc stearate as the major component and a fine powder material. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、像担持体の表面摩擦係数を低く制御するために用いる固形潤滑剤、およびこれを用いた潤滑剤供給装置、さらには該潤滑剤供給装置を備えた電子写真画像形成装置に関するものである。   The present invention relates to a solid lubricant used for controlling the surface friction coefficient of an image carrier to a low level, a lubricant supply device using the solid lubricant, and an electrophotographic image forming apparatus provided with the lubricant supply device. is there.

電子写真画像形成装置において、像担持体上トナー像の転写効率の向上、転写後残トナーのクリーニング性向上、あるいは像担持体の耐久性向上のために、感光体、あるいは中間転写体などの像担持体表面摩擦係数を小さくすることが有効であり、その為にいくつかの技術が提案されている。
例えば、特許文献1および2には、電子写真感光体の最表層にフッ素系樹脂微粒子を含有させ、使用中に感光体の摩耗により表面に出たフッ素系樹脂微粒子により、感光体表面を低摩擦係数に維持する方法が提案されている。特許文献3および4には、電子写真感光体の最表層の樹脂バインダーにフッ素、ケイ素を含有する重合体を含むものを用いる方法等が開示されているが、これらの方法では電子写真感光体が新しい間の表面摩擦係数は低いが、使用中に表面摩擦係数は高くなり効果の持続性が不十分である。
これに対して、特許文献5および6には、固形潤滑剤を微量に感光体表面に供給する手段を設けて、感光体表面摩擦係数を低下させる方法が提案されているが、これは摩擦係数を低く維持する事は出来るが、潤滑剤供給量の安定性、あるいは、供給源である固形潤滑剤の生産安定性に問題がある。
In an electrophotographic image forming apparatus, in order to improve the transfer efficiency of a toner image on an image carrier, improve the cleaning performance of residual toner after transfer, or improve the durability of an image carrier, an image such as a photoreceptor or an intermediate transfer member It is effective to reduce the surface friction coefficient of the support, and several techniques have been proposed for this purpose.
For example, in Patent Documents 1 and 2, fluororesin fine particles are contained in the outermost surface layer of an electrophotographic photosensitive member, and the surface of the photosensitive member is caused to have low friction by the fluororesin fine particles that are exposed to the surface due to wear of the photosensitive member during use. A method of maintaining the coefficient has been proposed. Patent Documents 3 and 4 disclose a method using a resin binder containing fluorine and silicon as a resin binder on the outermost layer of the electrophotographic photosensitive member. In these methods, the electrophotographic photosensitive member is disclosed. Although the surface friction coefficient during the new period is low, the surface friction coefficient becomes high during use, and the effect persistence is insufficient.
On the other hand, Patent Documents 5 and 6 propose a method of providing a means for supplying a small amount of solid lubricant to the surface of the photoconductor to reduce the photoconductor surface friction coefficient. However, there is a problem in the stability of the lubricant supply amount or the production stability of the solid lubricant as the supply source.

特開2005−156653号公報JP 2005-156653 A 特開2004−125906号公報JP 2004-125906 A 特開2004−46221号公報JP 2004-46221 A 特開2004−258336号公報JP 2004-258336 A 特開2005−3807号公報Japanese Patent Laid-Open No. 2005-3807 特開2004−198662号公報JP 2004-198662 A

固形潤滑剤を、微量に掻き取り像担持体へ安定して供給するには、固形潤滑剤が一定の硬さでなければならないが、ステアリン酸亜鉛を主成分とした固形潤滑剤は、製造時の冷却条件、あるいは、原材料ステアリン酸亜鉛の製造方法やロット差等の影響を受け易く、凝固するときの材料の結晶粒塊のできかたが変わり、結果として固形潤滑剤の硬さがばらついてしまう。硬さがばらつくことで、潤滑剤は過剰供給、あるいは過小供給となり様々な不具合を生じて来る。   In order to stably supply a small amount of the solid lubricant to the scraped image carrier, the solid lubricant must have a certain hardness, but the solid lubricant mainly composed of zinc stearate is It is easily affected by the cooling conditions of the material, the manufacturing method of the raw material zinc stearate and the lot difference, etc., and the formation of the crystal agglomerates of the material when solidified changes, resulting in variations in the hardness of the solid lubricant End up. As the hardness varies, the lubricant becomes excessively supplied or undersupplied, causing various problems.

過剰供給の場合は、固形潤滑剤の寿命不足、画像流れ、トナー成分の像担持体へのフィルミング助長等の不具合を生じ、過小供給の場合はそもそもの目的である、像担持体上トナー像の転写効率の向上、転写後残トナーのクリーニング性向上、あるいは像担持体の耐久性向上への効果が不十分となってしまう。   In the case of excessive supply, problems such as insufficient solid lubricant life, image flow, and filming of the toner component to the image carrier are caused. In the case of excessive supply, the toner image on the image carrier is the original purpose. Therefore, the effect of improving the transfer efficiency of the toner, improving the cleaning performance of the residual toner after transfer, or improving the durability of the image carrier is insufficient.

また、固形潤滑剤の製造は一般的に加熱溶融した材料を所定の金型に流し込み冷却させるが、冷却条件が金型の全ての位置で完全に同一に出来ないため、出来上がった固形潤滑剤の硬さが場所により異なり、像担持体全体に均一に潤滑剤を供給できなくなる。   In addition, the production of solid lubricant is generally performed by pouring and melting the heated and melted material into a predetermined mold, but the cooling conditions cannot be made completely the same at all positions of the mold. The hardness varies depending on the location, and the lubricant cannot be uniformly supplied to the entire image carrier.

本発明の目的は、上記問題点を解決し、製造方法や製造条件が異なった場合でも、あるいは原材料のロット差が生じた場合でも、一定の掻き取り量を維持でき、像担持体への均一な潤滑剤の供給を可能にする、ステアリン酸亜鉛を主成分とする固形潤滑剤およびこれを用いた潤滑剤供給装置、さらには該潤滑剤供給装置を備えた電子写真画像形成装置を提供することにある。   The object of the present invention is to solve the above-mentioned problems and maintain a constant scraping amount even when the manufacturing method and manufacturing conditions are different, or even when there are lot differences in raw materials, and the image carrier can be uniformly distributed. PROBLEM TO BE SOLVED: To provide a solid lubricant mainly composed of zinc stearate that makes it possible to supply various lubricants, a lubricant supply device using the solid lubricant, and an electrophotographic image forming apparatus equipped with the lubricant supply device It is in.

本発明は、以下のとおりである。
(1)電子写真画像形成装置における像担持体表面の潤滑のために使用される固形潤滑剤であって、その表面が掻き取られ、この掻き取られたものが前記像担持体に供給されるものであり、主成分としてのステアリン酸亜鉛と、微粉末材料とを含有してなることを特徴とする固形潤滑剤。
(2)前記微粉末材料が顔料であることを特徴とする上記(1)に記載の固形潤滑剤。
(3)前記微粉末材料が、ポリマー樹脂微粉末からなることを特徴とする上記(1)に記載の固形潤滑剤。
(4)前記微粉末材料が、少なくとも前記電子写真画像形成装置に用いるトナーの外添剤と同一の材料を含むことを特徴とする上記(1)に記載の固形潤滑剤。
(5)前記微粉末材料が、少なくとも前記電子写真画像形成装置に用いる転写紙の表面処理に使用されている顔料と同一の材料を含むことを特徴とする上記(2)に記載の固形潤滑剤。
(6)電子写真画像形成装置の像担持体表面に潤滑剤を供給する潤滑剤供給装置であって、上記(1)〜(5)のいずれか一に記載の固形潤滑剤と、潤滑剤供給部材とを備え、該潤滑剤供給部材は、前記固形潤滑剤を掻き取り、この掻き取ったものを前記像坦持体に供給することを特徴とする潤滑剤供給装置。
(7)前記潤滑剤供給部材が、ブラシローラからなることを特徴とする上記(6)に記載の潤滑剤供給装置。
(8)少なくとも、像担持体と、前記像担持体を帯電する帯電手段と、前記帯電手段によって帯電させられた像担持体表面に静電潜像を形成する潜像形成手段と、前記潜像形成手段によって形成された静電潜像の画像部にトナーを付着させる現像手段と、を有する電子写真画像形成装置において、上記(6)または(7)に記載の潤滑剤供給装置を備えることを特徴とする電子写真画像形成装置。
The present invention is as follows.
(1) A solid lubricant used for lubricating the surface of an image carrier in an electrophotographic image forming apparatus, the surface of which is scraped off, and the scraped material is supplied to the image carrier. A solid lubricant comprising zinc stearate as a main component and a fine powder material.
(2) The solid lubricant as described in (1) above, wherein the fine powder material is a pigment.
(3) The solid lubricant as described in (1) above, wherein the fine powder material comprises a fine polymer resin powder.
(4) The solid lubricant as described in (1) above, wherein the fine powder material contains at least the same material as the external additive of the toner used in the electrophotographic image forming apparatus.
(5) The solid lubricant as described in (2) above, wherein the fine powder material contains at least the same material as the pigment used for the surface treatment of transfer paper used in the electrophotographic image forming apparatus .
(6) A lubricant supply device for supplying a lubricant to the surface of the image carrier of the electrophotographic image forming apparatus, wherein the solid lubricant according to any one of (1) to (5) and the lubricant supply are provided. And a lubricant supply member that scrapes off the solid lubricant and supplies the scraped material to the image carrier.
(7) The lubricant supply device according to (6), wherein the lubricant supply member includes a brush roller.
(8) At least an image carrier, a charging unit that charges the image carrier, a latent image forming unit that forms an electrostatic latent image on the surface of the image carrier charged by the charging unit, and the latent image An electrophotographic image forming apparatus comprising: a developing unit that attaches toner to an image portion of an electrostatic latent image formed by the forming unit; and the lubricant supply device according to the above (6) or (7). An electrophotographic image forming apparatus.

本発明によれば、製造方法や製造条件が異なった場合でも、あるいは原材料のロット差が生じた場合でも、一定の掻き取り量を維持でき、像担持体への均一な潤滑剤の供給が可能となる固形潤滑剤、潤滑剤供給装置並びに電子写真画像形成装置を提供することができる。   According to the present invention, it is possible to maintain a constant scraping amount and to supply a uniform lubricant to the image carrier even when the manufacturing method and manufacturing conditions are different or even when there are lot differences in raw materials. A solid lubricant, a lubricant supply device, and an electrophotographic image forming apparatus can be provided.

以下、本発明をさらに詳しく説明する。
本発明の固形潤滑剤は、ステアリン酸亜鉛を主成分とし、これに微粉末材料を添加することで、掻き取り量の安定化を達成している。
Hereinafter, the present invention will be described in more detail.
The solid lubricant of the present invention contains zinc stearate as a main component, and by adding a fine powder material thereto, the scraping amount is stabilized.

固形潤滑剤の硬さが不安定で掻き取り量が一定でない原因は、原材料の純度、及び冷却固化条件等により、ステアリン酸亜鉛の結晶状態が異なるためで、高純度の原材料でゆっくりと冷却固化させた場合は結晶粒塊が大きくなり全体として硬い固形潤滑剤が製造されるが、反対に原材料純度が低く、急激に冷却した場合は結晶粒塊が小さく、更には結晶化しない部分も多く残り、柔らかい固形潤滑剤が出来てしまう。   The reason why the solid lubricant is unstable and the scraping amount is not constant is because the crystal state of zinc stearate differs depending on the purity of the raw material and the cooling and solidifying conditions, etc., and slowly solidifies by cooling with a high-purity raw material. If it is, the crystal grain lump becomes large and a hard solid lubricant is produced as a whole, but on the contrary, the purity of the raw material is low, and when cooled rapidly, the crystal grain lump is small and there are many parts that do not crystallize. A soft solid lubricant is produced.

本発明の固形潤滑剤は、ステアリン酸亜鉛を主成分とし、そこに微粉末材料を分散させているので、原材料の純度、製造条件に関係なく結晶粒塊の成長を抑制することが可能である。したがって本発明の固形潤滑剤は、比較的柔らく、安定した硬さを持ったものであり、その柔らかさを、微粉末材料自身の硬さで補うことで、安定した掻き取り量を維持することが可能となる。   Since the solid lubricant of the present invention is mainly composed of zinc stearate and fine powder material is dispersed therein, it is possible to suppress the growth of crystal agglomerates irrespective of the purity of raw materials and production conditions. . Therefore, the solid lubricant of the present invention is relatively soft and has a stable hardness, and a stable scraping amount is maintained by supplementing the softness with the hardness of the fine powder material itself. It becomes possible.

本発明に用いるステアリン酸亜鉛の原材料は、一般に金属石鹸、化粧品用原材料等で市販されているものであればどれでも用いることが可能である。また、微粉末材料としては無機顔料、有機顔料、ポリマー樹脂微粉末等が挙げられ、ステアリン酸亜鉛の固形物よりも高硬度で、かつ、離脱して電子写真感光体表面に付着した場合に不具合を生じない材料であるのが好ましい。   As the raw material for zinc stearate used in the present invention, any commercially available metal soap, cosmetic raw material, etc. can be used. In addition, examples of fine powder materials include inorganic pigments, organic pigments, polymer resin fine powders, etc., which are harder than zinc stearate solids and fail to adhere to the surface of an electrophotographic photosensitive member. It is preferable that the material does not cause the problem.

微粉末材料の大きさは、それが固形潤滑剤から離脱した場合に電子写真画像形成装置内で不具合を生じない大きさであればよく、一般にはトナーの粒子径以下であれば使用することが出来る。具体的には、体積平均粒径として15μm以下、好ましくは0.02〜5μmである。   The size of the fine powder material is not limited as long as it does not cause a problem in the electrophotographic image forming apparatus when it is detached from the solid lubricant. I can do it. Specifically, the volume average particle diameter is 15 μm or less, preferably 0.02 to 5 μm.

微粉末材料の種類としては、炭酸カルシウム、タルク、カオリンクレー、マイカ、硫酸バリウム、シリカ、酸化チタン、酸化亜鉛、酸化アルミニウム、硫化亜鉛等の透明、白色、あるいは着色度の低い材料からなる無機顔料等が適している。またポリマー樹脂微粉末としては、ポリメチルメタクリレート、ポリスチレン、ポリプロピレン、ポリアミド、シリコン、ポリウレタン、ポリアリレート、ポリカーボネート、ポリエステル、ポリイミド等の当業界で一般的に用いられているものが挙げられる。   Fine powder materials include inorganic pigments made of transparent, white, or low-colored materials such as calcium carbonate, talc, kaolin clay, mica, barium sulfate, silica, titanium oxide, zinc oxide, aluminum oxide, and zinc sulfide. Etc. are suitable. Examples of the polymer resin fine powder include those commonly used in the art such as polymethyl methacrylate, polystyrene, polypropylene, polyamide, silicon, polyurethane, polyarylate, polycarbonate, polyester, and polyimide.

ステアリン酸亜鉛に対する微粉末材料の添加量は、微粉末材料の密度、粒径により異なるが、固形潤滑剤全体を100質量部とした場合に、0.5〜70質量部が適している。0.5質量部未満であると微粉末材料の添加効果が現れず、70質量部を越えると潤滑剤供給装置で微量に掻き取ることが難しくなり、固形潤滑剤としての機能が発現しなくなる。   The amount of fine powder material added to zinc stearate varies depending on the density and particle size of the fine powder material, but 0.5 to 70 parts by mass is suitable when the total solid lubricant is 100 parts by mass. If the amount is less than 0.5 parts by mass, the effect of adding the fine powder material does not appear. If the amount exceeds 70 parts by mass, it becomes difficult to scrape in a minute amount with the lubricant supply device, and the function as a solid lubricant is not exhibited.

また、固形潤滑剤に微粉末材料を添加した副次的な効果として、電子写真感光体のような像担持体への異物付着を大幅に抑制することが可能となった。すなわち、電子写真感光体への異物付着の原因物質であるトナー外添剤のシリカ、酸化チタン等の微粉末、または転写紙の表面処理に用いられている炭酸カルシウム、タルク、カオリンクレー等の顔料を、固形潤滑剤の微粉末添加剤として積極的に用いた場合には、極めて長期間に渡って、電子写真感光体への異物付着が抑制されることを見いだした。この現象の理由は明確にはなっていないが、異物付着の原因物質となるものを、最初から感光体周りのシステム中に存在させて、システムの最適化を行っていることにより、後から同じ物質がシステム内に進入してもそれらの悪影響は少ないためと考えている。   Further, as a secondary effect of adding a fine powder material to the solid lubricant, it has become possible to greatly suppress foreign matter adhesion to an image carrier such as an electrophotographic photosensitive member. That is, toner external additives such as silica and fine powders such as titanium oxide, which are causative substances for adhesion of foreign matter to the electrophotographic photosensitive member, or pigments such as calcium carbonate, talc and kaolin clay used for the surface treatment of transfer paper Has been found to prevent foreign matter from adhering to the electrophotographic photoreceptor for an extremely long period of time when used as a fine powder additive for solid lubricants. The reason for this phenomenon has not been clarified. This is because even if a substance enters the system, the adverse effects are small.

本発明の固形潤滑剤は、原材料のステアリン酸亜鉛を加熱溶解し、これに所定の微粉末材料を加え、超音波分散機、あるいはホモジナイザー等の分散装置を用い、加熱溶解したステアリン酸亜鉛液に微粉末材料を分散し、これを金型に流し込み冷却すればよい。   In the solid lubricant of the present invention, the raw material zinc stearate is dissolved by heating, a predetermined fine powder material is added thereto, and the mixture is heated and dissolved in a dissolved zinc stearate solution using a dispersing device such as an ultrasonic dispersing machine or a homogenizer. The fine powder material may be dispersed, poured into a mold and cooled.

図1は、本発明の固形潤滑剤を供給する潤滑剤供給装置を備えた電子写真画像形成装置の一例である。図1において、画像形成装置は、図1中時計方向に回転駆動される像担持体としての感光体(1)を有し、感光体(1)の周囲に、帯電手段としての帯電ローラ(2)、潜像形成手段としての露光部(3)、現像手段としての現像部(4)を備えてなる。また、本発明の画像形成装置は、潤滑剤供給装置(5)が設けられている。潤滑剤供給装置(5)は、固形潤滑剤(50)と潤滑剤供給部材としてのブラシローラ(51)から主に構成されている。さらに、潤滑剤供給装置の下流には、現像後の感光体をクリーニングするクリーニングブレード(6)が設けられている。   FIG. 1 is an example of an electrophotographic image forming apparatus provided with a lubricant supply device for supplying a solid lubricant of the present invention. In FIG. 1, the image forming apparatus has a photosensitive member (1) as an image carrier that is driven to rotate clockwise in FIG. 1, and a charging roller (2) as a charging unit is provided around the photosensitive member (1). ), An exposure unit (3) as a latent image forming unit, and a development unit (4) as a development unit. Further, the image forming apparatus of the present invention is provided with a lubricant supply device (5). The lubricant supply device (5) mainly includes a solid lubricant (50) and a brush roller (51) as a lubricant supply member. Further, a cleaning blade (6) for cleaning the developed photoconductor is provided downstream of the lubricant supply device.

画像形成装置は、感光体(1)を図1中時計方向に回転駆動して、感光体(1)を帯電ローラ(2)で一様に帯電した後、露光部(3)により画像データで変調されたレーザを照射して感光体(1)の表面に静電潜像を形成し、静電潜像の形成された画像部に現像部(4)でトナーを付着させて現像する。画像形成装置は、感光体(1)に形成されたトナー画像を搬送されてきた転写紙(7)に転写させ、図示しない定着部に転写紙を搬送し、画像の定着を行う。   The image forming apparatus rotates the photosensitive member (1) in the clockwise direction in FIG. 1, uniformly charges the photosensitive member (1) with the charging roller (2), and then uses the exposure unit (3) as image data. Irradiation with a modulated laser forms an electrostatic latent image on the surface of the photoreceptor (1), and a developing unit (4) attaches toner to the image portion where the electrostatic latent image is formed and develops it. The image forming apparatus transfers the toner image formed on the photoreceptor (1) onto the transfer paper (7) that has been transported, transports the transfer paper to a fixing unit (not shown), and fixes the image.

また画像形成装置は、前記転写後、感光体(1)をさらに回転して、潤滑剤供給装置(5)によって固形潤滑剤(50)を微量に掻き取り感光体(1)に供給する。図1の形態では、潤滑剤供給装置(5)は、付勢手段としてのバネ(52)によって付勢された固形潤滑剤(50)と、その固形潤滑剤(50)および感光体(1)の表面の両方を摺擦するように回転するブラシローラ(51)とからなる。そして、潤滑剤供給装置(5)では、ブラシローラ(51)が回転すると、ブラシローラ(51)の摺擦により固形潤滑剤(50)が削られ、微粉末状の潤滑性物質がブラシローラ(51)に付着し、これが感光体(1)の表面に供給される。続いて、感光体(1)表面に残留するトナーをクリーニングブレード(6)により掻き落として除去すると同時に、微粉末状で供給された潤滑剤を感光体(1)表面に引き延ばして薄く塗布する。その後、機種によっては、図示しない除電部で除電するものもある。また、潤滑剤供給装置(5)はクリーニングブレード(6)の下流側に設けている機種もある。画像形成装置は、以上を1サイクルとし、再度感光体(1)を帯電ローラ(2)で一様に帯電させた後、上記同様に、次の画像形成を行う。   Further, after the transfer, the image forming apparatus further rotates the photoreceptor (1), scrapes a small amount of solid lubricant (50) by the lubricant supply device (5), and supplies the solid lubricant (50) to the photoreceptor (1). In the form of FIG. 1, the lubricant supply device (5) includes a solid lubricant (50) biased by a spring (52) as a biasing means, the solid lubricant (50), and the photoreceptor (1). And a brush roller (51) that rotates to rub both surfaces. Then, in the lubricant supply device (5), when the brush roller (51) rotates, the solid lubricant (50) is scraped by the rubbing of the brush roller (51), and the fine powdery lubricating substance is transferred to the brush roller ( 51) and is supplied to the surface of the photoreceptor (1). Subsequently, the toner remaining on the surface of the photoreceptor (1) is removed by scraping with the cleaning blade (6), and at the same time, the lubricant supplied in the form of fine powder is stretched on the surface of the photoreceptor (1) and applied thinly. Thereafter, depending on the model, there is a type of static elimination by a static elimination unit (not shown). There is also a model in which the lubricant supply device (5) is provided on the downstream side of the cleaning blade (6). The image forming apparatus sets the above as one cycle, and after charging the photoreceptor (1) uniformly with the charging roller (2) again, the next image formation is performed as described above.

(実施例1〜8および比較例1〜4)
表1で示した処方の固形潤滑剤を次の手順で作製した。
所定量のステアリン酸亜鉛を容器に取り、これをオイルバスにて150℃に加熱し、ステアリン酸亜鉛を溶融した。これに所定の微粉末材料を加え、ホモジナイザーで3分間分散し、微粉末材料を分散したステアリン酸亜鉛溶融液を得た。これを所定の金型に流し込み所定の冷却条件にて冷却し、本発明による固形潤滑剤を得た。
なお、下記表1において、微粉末材料である酸化チタンA110の体積平均粒径は0.25μmであり、エポスターMA1002の体積平均粒径は2μmである。
(Examples 1-8 and Comparative Examples 1-4)
A solid lubricant having the formulation shown in Table 1 was prepared by the following procedure.
A predetermined amount of zinc stearate was placed in a container and heated to 150 ° C. in an oil bath to melt the zinc stearate. Predetermined fine powder material was added to this and dispersed with a homogenizer for 3 minutes to obtain a zinc stearate melt in which the fine powder material was dispersed. This was poured into a predetermined mold and cooled under predetermined cooling conditions to obtain a solid lubricant according to the present invention.
In Table 1 below, the volume average particle diameter of titanium oxide A110, which is a fine powder material, is 0.25 μm, and the volume average particle diameter of the poster MA1002 is 2 μm.

Figure 2007224137
Figure 2007224137

得られた固形潤滑剤をリコー社製Imagio NeoC355に取り付け、実機評価を行った。Imagio NeoC355は、図1に示した装置構成を有する。
実機にて3万枚コピー後の固形潤滑剤の消費量、感光体への異物付着及び傷の発生状況を評価し結果を表2へ示した
The obtained solid lubricant was attached to Imagio NeoC355 manufactured by Ricoh Co., Ltd., and the actual machine was evaluated. The Imagio NeoC355 has the device configuration shown in FIG.
Table 2 shows the results of evaluating the amount of solid lubricant consumed after 30,000 copies were made on an actual machine, the adhesion of foreign matter to the photoconductor and the occurrence of scratches.

Figure 2007224137
Figure 2007224137

以上より明らかなように微粉末材料を添加した固形潤滑剤は、原材料の種類、冷却条件の違いに依存せずにほぼ一定の消費量を維持することが出来た。また微粉末材料を添加したことによる副作用としての、感光体表面への異物付着、感光体傷についても未添加品と同様に特に悪影響は確認できなかった。
また、製造過程で冷却後に固形潤滑剤を金型から取り出す時に、実施例では割れによる破損は少なかったが、比較例では破損が多く、特に比較例1及び3では半数以上が破損した。すなわちステアリン酸亜鉛に微粉末材料を添加することで、原材料、製造条件が変化しても一定の製造安定性を確保できることも明らかになった。
As is clear from the above, the solid lubricant to which the fine powder material was added was able to maintain a substantially constant consumption without depending on the type of raw material and the difference in cooling conditions. In addition, as a side effect due to the addition of the fine powder material, no particular adverse effects were observed with respect to the adhesion of foreign matter to the surface of the photoreceptor and scratches on the photoreceptor as well as the unadded product.
Further, when the solid lubricant was taken out from the mold after cooling in the manufacturing process, the damage due to cracking was small in the examples, but the damage was large in the comparative examples, and more than half of them were damaged particularly in the comparative examples 1 and 3. That is, it has also been clarified that by adding a fine powder material to zinc stearate, a certain production stability can be secured even if the raw materials and production conditions are changed.

(実施例9〜11および比較例5)
実施例1〜8と同様に表3で示した処方の固形潤滑剤を作製した。
なお、下記表3において、微粉末材料であるX−24−9163Aの体積平均粒径は0.12μmであり、Brilliant−15の体積平均粒径は0.15μmであり、カオリンクレー5Mの体積平均粒径は3μmである。
(Examples 9 to 11 and Comparative Example 5)
A solid lubricant having the formulation shown in Table 3 was prepared in the same manner as in Examples 1-8.
In Table 3 below, the volume average particle size of X-24-9163A, which is a fine powder material, is 0.12 μm, the volume average particle size of Brilliant-15 is 0.15 μm, and the volume average of Kaolin clay 5M The particle size is 3 μm.

Figure 2007224137
Figure 2007224137

得られた固形潤滑剤をリコー社製Imagio NeoC455に取り付け、クリーニング条件を以下のように変更して実機評価を行った。Imagio NeoC455は、図1に示した装置構成を有する。
(クリーニング条件の変更箇所)
(1)25℃におけるクリーニングブレード物性:反発弾性率=68%,JIS-A硬度=70°
(2)ブレード当接部の感光体接線とブレードのトナーを堰き止める面との成す角度=83°
実施例9,実施例11ではトナーに外添したシリカと同一の物を用いた。また炭酸カルシウム、カオリンクレーについては、広く製紙工業で用いられている物を選定した。
実機にて6万枚コピー後の固形潤滑剤の消費量、感光体への異物付着及び傷の発生状況を評価し結果を表4へ示した。
The obtained solid lubricant was attached to Imagio NeoC455 manufactured by Ricoh Co., Ltd., and the actual conditions were evaluated by changing the cleaning conditions as follows. The Imagio NeoC455 has the device configuration shown in FIG.
(Changes in cleaning conditions)
(1) Physical properties of cleaning blade at 25 ° C .: Rebound resilience = 68%, JIS-A hardness = 70 °
(2) Angle between the tangent of the photosensitive member of the blade contact portion and the surface of the blade for blocking the toner = 83 °
In Examples 9 and 11, the same silica as that externally added to the toner was used. For calcium carbonate and kaolin clay, those widely used in the paper industry were selected.
The consumption of solid lubricant after copying 60,000 sheets with an actual machine, the foreign matter adhesion to the photoreceptor and the occurrence of scratches were evaluated, and the results are shown in Table 4.

Figure 2007224137
Figure 2007224137

以上より明らかなように固形潤滑剤にトナーに使用している外添剤微粉末と同一の材料を分散した物、あるいは転写紙の表面処理に用いられている物と同じ材料の微粉末を分散した物を用いた場合、感光体への異物付着に対して極めて良好な特性を示した。   As is clear from the above, the same material as the external additive powder used in the toner is dispersed in the solid lubricant, or the same material used for the surface treatment of the transfer paper is dispersed. When the product was used, it showed very good characteristics against foreign matter adhesion to the photoreceptor.

本発明によれば、製造方法や製造条件が異なった場合でも、あるいは原材料のロット差が生じた場合でも、一定の掻き取り量を維持でき、像担持体への均一な潤滑剤の供給が可能となる固形潤滑剤および電子写真画像形成装置を提供することができる。   According to the present invention, it is possible to maintain a constant scraping amount and to supply a uniform lubricant to the image carrier even when the manufacturing method and manufacturing conditions are different or even when there are lot differences in raw materials. A solid lubricant and an electrophotographic image forming apparatus can be provided.

本発明の固形潤滑剤を供給する潤滑剤供給装置を備えた電子写真画像形成装置の一例である。1 is an example of an electrophotographic image forming apparatus provided with a lubricant supply device for supplying a solid lubricant of the present invention.

符号の説明Explanation of symbols

(1) 感光体
(2) 帯電ローラ
(3) 露光部
(4) 現像部
(5) 潤滑剤供給装置
(50) 固形潤滑剤
(51) ブラシローラ
(6) クリーニングブレード
(7) 転写紙
(1) Photoconductor (2) Charging roller (3) Exposure unit (4) Development unit (5) Lubricant supply device (50) Solid lubricant (51) Brush roller (6) Cleaning blade (7) Transfer paper

Claims (8)

電子写真画像形成装置における像担持体表面の潤滑のために使用される固形潤滑剤であって、その表面が掻き取られ、この掻き取られたものが前記像担持体に供給されるものであり、主成分としてのステアリン酸亜鉛と、微粉末材料とを含有してなることを特徴とする固形潤滑剤。   A solid lubricant used for lubricating the surface of an image carrier in an electrophotographic image forming apparatus, the surface of which is scraped off, and the scraped material is supplied to the image carrier. A solid lubricant comprising zinc stearate as a main component and a fine powder material. 前記微粉末材料が顔料であることを特徴とする請求項1に記載の固形潤滑剤。   The solid lubricant according to claim 1, wherein the fine powder material is a pigment. 前記微粉末材料が、ポリマー樹脂微粉末からなることを特徴とする請求項1に記載の固形潤滑剤。   The solid lubricant according to claim 1, wherein the fine powder material is a polymer resin fine powder. 前記微粉末材料が、少なくとも前記電子写真画像形成装置に用いるトナーの外添剤と同一の材料を含むことを特徴とする請求項1に記載の固形潤滑剤。   2. The solid lubricant according to claim 1, wherein the fine powder material contains at least the same material as an external additive for toner used in the electrophotographic image forming apparatus. 前記微粉末材料が、少なくとも前記電子写真画像形成装置に用いる転写紙の表面処理に使用されている顔料と同一の材料を含むことを特徴とする請求項2に記載の固形潤滑剤。   3. The solid lubricant according to claim 2, wherein the fine powder material contains at least the same material as the pigment used for the surface treatment of transfer paper used in the electrophotographic image forming apparatus. 電子写真画像形成装置の像担持体表面に潤滑剤を供給する潤滑剤供給装置であって、
請求項1〜5のいずれか一項に記載の固形潤滑剤と、潤滑剤供給部材とを備え、該潤滑剤供給部材は、前記固形潤滑剤を掻き取り、この掻き取ったものを前記像坦持体に供給することを特徴とする潤滑剤供給装置。
A lubricant supply device for supplying a lubricant to the surface of an image carrier of an electrophotographic image forming apparatus,
A solid lubricant according to any one of claims 1 to 5 and a lubricant supply member, the lubricant supply member scraping off the solid lubricant, and removing the scraped image from the image carrier. A lubricant supply device, characterized by being supplied to a holder.
前記潤滑剤供給部材が、ブラシローラからなることを特徴とする請求項6に記載の潤滑剤供給装置。   The lubricant supply device according to claim 6, wherein the lubricant supply member includes a brush roller. 少なくとも、像担持体と、前記像担持体を帯電する帯電手段と、前記帯電手段によって帯電させられた像担持体表面に静電潜像を形成する潜像形成手段と、前記潜像形成手段によって形成された静電潜像の画像部にトナーを付着させる現像手段と、を有する電子写真画像形成装置において、
請求項6または7に記載の潤滑剤供給装置を備えることを特徴とする電子写真画像形成装置。
At least by an image carrier, a charging unit for charging the image carrier, a latent image forming unit for forming an electrostatic latent image on the surface of the image carrier charged by the charging unit, and the latent image forming unit An electrophotographic image forming apparatus comprising: a developing unit that attaches toner to an image portion of the formed electrostatic latent image;
An electrophotographic image forming apparatus comprising the lubricant supply device according to claim 6.
JP2006046581A 2006-02-23 2006-02-23 Solid lubricant, lubricant feeder and electrophotographic image-forming apparatus Pending JP2007224137A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006046581A JP2007224137A (en) 2006-02-23 2006-02-23 Solid lubricant, lubricant feeder and electrophotographic image-forming apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006046581A JP2007224137A (en) 2006-02-23 2006-02-23 Solid lubricant, lubricant feeder and electrophotographic image-forming apparatus

Publications (1)

Publication Number Publication Date
JP2007224137A true JP2007224137A (en) 2007-09-06

Family

ID=38546238

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006046581A Pending JP2007224137A (en) 2006-02-23 2006-02-23 Solid lubricant, lubricant feeder and electrophotographic image-forming apparatus

Country Status (1)

Country Link
JP (1) JP2007224137A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009186610A (en) * 2008-02-04 2009-08-20 Ricoh Co Ltd Protective agent for image bearing member, protective layer setting unit, image forming method, image forming apparatus, and process cartridge
JP2009282078A (en) * 2008-05-19 2009-12-03 Ricoh Co Ltd Image carrier protecting agent, protective layer forming device and process cartridge and image forming apparatus using the same
JP2009288478A (en) * 2008-05-29 2009-12-10 Ricoh Co Ltd Image forming apparatus and protective agent block used therefor
JP2009288266A (en) * 2008-05-27 2009-12-10 Ricoh Co Ltd Protective agent for image carrier, protection layer forming device, process cartridge, image forming apparatus, and image forming method
JP2009288727A (en) * 2008-05-30 2009-12-10 Ricoh Co Ltd Image carrier protecting agent, protective layer forming device, image forming method, image forming apparatus, and process cartridge
JP2010060839A (en) * 2008-09-03 2010-03-18 Ricoh Co Ltd Method for manufacturing image carrier protective agent, the image carrier protective agent, protective layer forming apparatus, image forming method, and image forming apparatus
JP2010186171A (en) * 2009-01-19 2010-08-26 Ricoh Co Ltd Image-bearing member protecting agent, protective layer forming device, image forming method, image forming apparatus, and process cartridge
JP2017173394A (en) * 2016-03-22 2017-09-28 コニカミノルタ株式会社 Solid lubricant, electrophotographic image forming apparatus, and image forming method
JP2018123229A (en) * 2017-01-31 2018-08-09 コニカミノルタ株式会社 A solid lubricant, a coating applicator for the solid lubricant and an image formation device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009186610A (en) * 2008-02-04 2009-08-20 Ricoh Co Ltd Protective agent for image bearing member, protective layer setting unit, image forming method, image forming apparatus, and process cartridge
JP2009282078A (en) * 2008-05-19 2009-12-03 Ricoh Co Ltd Image carrier protecting agent, protective layer forming device and process cartridge and image forming apparatus using the same
JP2009288266A (en) * 2008-05-27 2009-12-10 Ricoh Co Ltd Protective agent for image carrier, protection layer forming device, process cartridge, image forming apparatus, and image forming method
JP2009288478A (en) * 2008-05-29 2009-12-10 Ricoh Co Ltd Image forming apparatus and protective agent block used therefor
JP2009288727A (en) * 2008-05-30 2009-12-10 Ricoh Co Ltd Image carrier protecting agent, protective layer forming device, image forming method, image forming apparatus, and process cartridge
JP2010060839A (en) * 2008-09-03 2010-03-18 Ricoh Co Ltd Method for manufacturing image carrier protective agent, the image carrier protective agent, protective layer forming apparatus, image forming method, and image forming apparatus
JP2010186171A (en) * 2009-01-19 2010-08-26 Ricoh Co Ltd Image-bearing member protecting agent, protective layer forming device, image forming method, image forming apparatus, and process cartridge
JP2017173394A (en) * 2016-03-22 2017-09-28 コニカミノルタ株式会社 Solid lubricant, electrophotographic image forming apparatus, and image forming method
US9982215B2 (en) 2016-03-22 2018-05-29 Konica Minolta, Inc. Solid lubricant, electrophotographic image forming apparatus, and image forming method
JP2018123229A (en) * 2017-01-31 2018-08-09 コニカミノルタ株式会社 A solid lubricant, a coating applicator for the solid lubricant and an image formation device

Similar Documents

Publication Publication Date Title
JP2007224137A (en) Solid lubricant, lubricant feeder and electrophotographic image-forming apparatus
US6330420B1 (en) Image forming apparatus
JP2010091852A (en) Lubricant application device and image forming apparatus
JP3910205B2 (en) Toner composition
JP2007212979A (en) Cleaning equipment and image forming apparatus
JP2009042274A (en) Lubricant supply device, process cartridge, and image forming apparatus
JP2008065272A (en) Lubricant molded product, lubricant application device, process cartridge and image forming apparatus
JP4991374B2 (en) Image forming method
JP2008268470A (en) Image forming apparatus
JP2009282217A (en) Image forming method
JP2004287102A (en) Picture forming method
JP2009042300A (en) Solid lubricant coating device and image forming apparatus
JP2000194158A (en) Image forming device and process cartridge
JP2020016766A (en) Cleaning blade, cleaning device, image forming apparatus, and process cartridge
JP2007272187A (en) Cleaning device, process cartridge and image forming apparatus
JP2007057966A (en) Image forming apparatus
JP2008191239A (en) Solid lubricant application equipment and image forming apparatus mounted with the same
JP4653897B2 (en) Liquid developer coating apparatus, liquid developing apparatus, and image forming apparatus
JP2007241114A (en) Lubricant-coating device, image forming apparatus, and processing cartridge
JP2001042646A (en) Image forming device
JP4250486B2 (en) Development method
JP2001312118A (en) Image forming device
JP2005250346A (en) Image forming apparatus
JP2009001649A (en) Molded lubricant, lubricant applicator, process cartridge and image forming apparatus
JP6962023B2 (en) Cleaning equipment and image forming equipment