JPH04311988A - Semiconducting cleaning blade - Google Patents
Semiconducting cleaning bladeInfo
- Publication number
- JPH04311988A JPH04311988A JP10357591A JP10357591A JPH04311988A JP H04311988 A JPH04311988 A JP H04311988A JP 10357591 A JP10357591 A JP 10357591A JP 10357591 A JP10357591 A JP 10357591A JP H04311988 A JPH04311988 A JP H04311988A
- Authority
- JP
- Japan
- Prior art keywords
- polyurethane elastomer
- cleaning blade
- sheet
- liquid
- curing agent
- 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
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 229920003225 polyurethane elastomer Polymers 0.000 claims abstract description 13
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 11
- 238000003384 imaging method Methods 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 5
- 239000011159 matrix material Substances 0.000 abstract description 3
- IBOFVQJTBBUKMU-UHFFFAOYSA-N 4,4'-methylene-bis-(2-chloroaniline) Chemical compound C1=C(Cl)C(N)=CC=C1CC1=CC=C(N)C(Cl)=C1 IBOFVQJTBBUKMU-UHFFFAOYSA-N 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 239000006229 carbon black Substances 0.000 abstract 1
- 239000002131 composite material Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 108091008695 photoreceptors Proteins 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004970 Chain extender Substances 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Cleaning In Electrography (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は電子写真の感光体表面に
残留するトナー清拭するクリーニングブレードに関する
。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning blade for wiping off toner remaining on the surface of an electrophotographic photoreceptor.
【０００２】0002
【従来の技術】電子写真においては、感光体に形成され
た潜像をトナーを用いて現像することによって現像し、
次にトナー像を記録紙に転写して、未定着画像を形成さ
せる。この際に画像形成に寄与しないトナー、すなわち
感光体表面に残留するトナーを清拭する必要がある。こ
の残留トナーを除去するためには、ポリウレタンを代表
とするゴムエラストマー（ゴム状弾性体）よりなるブレ
ードを感光体表面に摺擦してトナーを除去する方式が広
く用いられている。BACKGROUND OF THE INVENTION In electrophotography, a latent image formed on a photoreceptor is developed by using toner.
Next, the toner image is transferred to recording paper to form an unfixed image. At this time, it is necessary to wipe off toner that does not contribute to image formation, that is, toner that remains on the surface of the photoreceptor. In order to remove this residual toner, a method is widely used in which a blade made of a rubber elastomer (rubber-like elastic material), typically polyurethane, is rubbed against the surface of the photoreceptor to remove the toner.
【０００３】0003
【発明が解決しようとする課題】しかしながら、上記従
来例では、ポリウレタンエラストマーは電気絶縁体であ
って、回転する感光体ドラムと接触（摺擦）しているこ
とから、静電気を帯びる。その結果、除去直前のトナー
と静電的に反発してトナーを周囲に飛散させるという欠
点を伴った。However, in the conventional example described above, the polyurethane elastomer is an electrical insulator and is charged with static electricity because it is in contact with (slides against) the rotating photoreceptor drum. As a result, this has the disadvantage that it electrostatically repels the toner that is about to be removed, causing the toner to scatter around.
【０００４】一方には、カーボンをマトリックス中に分
散させて、ポリウレタンエラストマーに導電性を付与す
る試みがある。しかし、均一な分散状態を実現すること
がむずかしいことから、均一にマトリックスの抵抗率を
低下させることができないという欠点があった。On the one hand, there have been attempts to impart electrical conductivity to polyurethane elastomers by dispersing carbon in the matrix. However, since it is difficult to achieve a uniform dispersion state, there is a drawback that the resistivity of the matrix cannot be uniformly lowered.
【０００５】[0005]
【課題を解決するための手段】本発明はクリーニングブ
レードとして液状ニトリルゴム（液状ＮＢＲ）を０．５
〜４０重量％含有するポリウレタンエラストマーよりな
るクリーニングブレード（以下、「ブレード」と略称す
ることがある）を用いることにより、ブレード全面に亘
り、均一な体積電気抵抗率を実現する様にブレードを半
導電化したものである。[Means for Solving the Problems] The present invention uses liquid nitrile rubber (liquid NBR) at 0.50% as a cleaning blade.
By using a cleaning blade (hereinafter sometimes abbreviated as "blade") made of polyurethane elastomer containing ~40% by weight, the blade is made semi-conductive to achieve uniform volume electrical resistivity over the entire surface of the blade. It has become.
【０００６】本発明のブレード用ポリウレタンを作成す
る為の材料としては、公知の２液硬化型熱可塑性ポリウ
レタン樹脂を用いることができる。また、液状ＮＢＲと
しては、例えば商品名「ニポール１３１２ＤＮ６０１」
（日本ゼオン社製）があげられる。その添加量は液状Ｎ
ＢＲがポリウレタンエラストマー中に組成物基準で０．
５〜４０％（重量％、以下同様）、好ましくは、１〜３
０％含有される範囲とするのが良い。液状ＮＢＲを配合
することにより、クリーニングブレードを非帯電性（導
電性）とすることができる。[0006] As a material for producing the polyurethane for the blade of the present invention, a known two-component curing thermoplastic polyurethane resin can be used. In addition, as a liquid NBR, for example, the product name "Nipole 1312DN601" is used.
(manufactured by Nippon Zeon Co., Ltd.). The amount added is liquid N
BR is 0.0 on a composition basis in the polyurethane elastomer.
5 to 40% (weight%, the same applies hereinafter), preferably 1 to 3
It is preferable to set the content to 0%. By blending liquid NBR, the cleaning blade can be made non-electrostatic (conductive).
【０００７】本発明のクリーニングブレードは次の操作
によって得られる：例えば、イソシアネート末端含有プ
レポリマー成分、鎖延長剤及び液状ＮＢＲを混合し、脱
泡後にモールドにキャスティングし、シート状のポリウ
レタンエラストマーを得て、これを所定の形状に裁断す
る。The cleaning blade of the present invention can be obtained by the following operation: For example, an isocyanate-terminated prepolymer component, a chain extender, and liquid NBR are mixed, and after defoaming, the mixture is cast into a mold to obtain a sheet-like polyurethane elastomer. and cut it into a predetermined shape.
【０００８】[0008]
【実施例】以下に実施例及び比較例を挙げて説明する。
実施例１〜３２液硬化型ポリウレタンエラストマー［Ｎ
ＣＯ末端含有プレポリマー、ＮＣＯ基含有量４．９ｗｔ
％］と硬化剤としてメチレンビス（ｏ−クロルアニリン
）とを用いた。[Examples] Examples and comparative examples will be given and explained below. Examples 1 to 32 Liquid-curing polyurethane elastomer [N
CO-terminated prepolymer, NCO group content 4.9wt
%] and methylenebis(o-chloroaniline) as a curing agent.
【０００９】上記２液硬化型ポリウレタンエラストマー
１００部を８０℃に加熱し、別に１３０℃に加熱溶融し
た上記硬化剤１５．６部に所定の液状ＮＢＲを混合し、
当該混合物を上記２液硬化型ポリウレタンエラストマー
に混合し、脱泡後に１１０℃に予熱した金型にキャステ
ィングして、シート（厚さ２ｍｍ）を得た。このシート
を巾２．３ｍｍ×長さ３１０ｍｍに裁断し、更にブレー
ドエッジを形成後に板金にホットメルト接着剤で接着し
てブレード部材を作成した。一方で、巾１００ｍｍ×長
さ１００ｍｍに裁断したシートを用いて体積電気抵抗率
を測定した。[0009] 100 parts of the above two-component curing polyurethane elastomer was heated to 80°C, and a predetermined liquid NBR was mixed with 15.6 parts of the above curing agent, which was separately heated and melted at 130°C.
The mixture was mixed with the two-component curable polyurethane elastomer, and after defoaming, it was cast into a mold preheated to 110° C. to obtain a sheet (thickness: 2 mm). This sheet was cut to a width of 2.3 mm and a length of 310 mm, and after forming a blade edge, it was adhered to a sheet metal with a hot melt adhesive to create a blade member. On the other hand, the volume electrical resistivity was measured using a sheet cut to a width of 100 mm and a length of 100 mm.
【００１０】ブレード部材をレーザービームプリンター
［商品名：カラーレーザコピーＣＬＣ−２００（キヤノ
ン社製）］に装着し、トナーの飛散状態をチェックした
。体積電気抵抗率の測定およびトナーの飛散状態の観察
は２３℃６０ＲＨ％（相対湿度）の環境に一昼夜放置後
に行なう。その結果を表１に示す。液状ＮＢＲの添加量
は２液硬化型ポリウレタン樹脂［プレポリマー及び前記
硬化剤の混合物］に対する重量％で表示した。体積電気
抵抗率の測定は電気抵抗測定器［商品名：ＹＨＰ４３２
９Ａ（横河ヒューレットパッカード社製）を用いて行な
った。The blade member was attached to a laser beam printer [trade name: Color Laser Copy CLC-200 (manufactured by Canon Inc.)], and the state of toner scattering was checked. Measurement of the volume resistivity and observation of the state of toner scattering are performed after leaving the sample in an environment of 23° C. and 60 RH% (relative humidity) for one day and night. The results are shown in Table 1. The amount of liquid NBR added was expressed in weight % with respect to the two-component curable polyurethane resin [the mixture of the prepolymer and the curing agent]. Volume electrical resistivity can be measured using an electrical resistance meter [Product name: YHP432]
9A (manufactured by Yokogawa Hewlett-Packard).
【００１１】レーザービームプリンター［商品名：ＣＬ
Ｃ−２００］はブレード上部に廃トナーを移送する部材
を備えているのでこれを取外して観察を行なった。[0011] Laser beam printer [Product name: CL
C-200] is equipped with a member for transporting waste toner on the upper part of the blade, so this was removed and observed.
【００１２】0012
【表１】 ＊１：商品名＊２：商品名[Table 1] *1: Product name *2: Product name
【００１３】[0013]
【発明の効果】本発明のクリーニングブレードは半導電
性で、中抵抗値を示し、非帯電性であることから、電子
写真装置中でのトナー飛散を防止する効果を発揮する。Effects of the Invention The cleaning blade of the present invention is semiconductive, exhibits a medium resistance value, and is non-static, so it exhibits the effect of preventing toner scattering in an electrophotographic apparatus.
【図１】実施例で得られる成形品の体積電気抵抗率とポ
リウレタンエラストマーに対する液状ニトリルゴムの添
加量との関係を表わす。FIG. 1 shows the relationship between the volume electrical resistivity of molded articles obtained in Examples and the amount of liquid nitrile rubber added to the polyurethane elastomer.
Claims (1)
液状ニトリルゴムを０．５〜４０重量％含有するポリウ
レタンエラストマーよりなるクリーニングブレード。1. A cleaning blade made of a polyurethane elastomer containing 0.5 to 40% by weight of liquid nitrile rubber for use in an electrophotographic imaging system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10357591A JPH04311988A (en) | 1991-04-10 | 1991-04-10 | Semiconducting cleaning blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10357591A JPH04311988A (en) | 1991-04-10 | 1991-04-10 | Semiconducting cleaning blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04311988A true JPH04311988A (en) | 1992-11-04 |
Family
ID=14357590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10357591A Pending JPH04311988A (en) | 1991-04-10 | 1991-04-10 | Semiconducting cleaning blade |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04311988A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005173627A (en) * | 2005-01-24 | 2005-06-30 | Teruo Yoshioka | Karaoke device characterized by key changing user interface |
| US7551884B2 (en) * | 2006-06-07 | 2009-06-23 | Kabushiki Kaisha Toshiba | Cleaning apparatus and image forming apparatus |
| US7714059B2 (en) | 2005-10-04 | 2010-05-11 | Sumitomo Rubber Industries, Ltd. | Cleaning blade for use in image-forming apparatus |
-
1991
- 1991-04-10 JP JP10357591A patent/JPH04311988A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005173627A (en) * | 2005-01-24 | 2005-06-30 | Teruo Yoshioka | Karaoke device characterized by key changing user interface |
| US7714059B2 (en) | 2005-10-04 | 2010-05-11 | Sumitomo Rubber Industries, Ltd. | Cleaning blade for use in image-forming apparatus |
| US7551884B2 (en) * | 2006-06-07 | 2009-06-23 | Kabushiki Kaisha Toshiba | Cleaning apparatus and image forming apparatus |
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