JPS62182755A - Developing agent for electrostatic photography - Google Patents
Developing agent for electrostatic photographyInfo
- Publication number
- JPS62182755A JPS62182755A JP61023512A JP2351286A JPS62182755A JP S62182755 A JPS62182755 A JP S62182755A JP 61023512 A JP61023512 A JP 61023512A JP 2351286 A JP2351286 A JP 2351286A JP S62182755 A JPS62182755 A JP S62182755A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- pigment
- inorg
- photosensitive drum
- electric resistance
- 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
- 239000003082 abrasive agent Substances 0.000 claims abstract 4
- 108091008695 photoreceptors Proteins 0.000 claims description 22
- 239000001023 inorganic pigment Substances 0.000 claims description 12
- 239000000049 pigment Substances 0.000 abstract description 9
- 238000004140 cleaning Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 238000005498 polishing Methods 0.000 abstract description 5
- 230000000704 physical effect Effects 0.000 abstract description 3
- 238000013019 agitation Methods 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 7
- 238000003756 stirring Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000003086 colorant Substances 0.000 description 3
- 239000006249 magnetic particle Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 229910052596 spinel Inorganic materials 0.000 description 3
- 239000011029 spinel Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910016516 CuFe2O4 Inorganic materials 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- DXKGMXNZSJMWAF-UHFFFAOYSA-N copper;oxido(oxo)iron Chemical compound [Cu+2].[O-][Fe]=O.[O-][Fe]=O DXKGMXNZSJMWAF-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/097—Plasticisers; Charge controlling agents
- G03G9/09708—Inorganic compounds
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/005—Materials for treating the recording members, e.g. for cleaning, reactivating, polishing
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Developing Agents For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
く技術分野〉
この発明は複写機等の電子写真装置の現像に用いられる
電子写真用現像剤に関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an electrophotographic developer used for development in an electrophotographic apparatus such as a copying machine.
〈従来技術とその欠点〉
従来、複写機等の電子写真装置では、感光体ドラム表面
に付着し画像の品質を低下させる酸化物や窒化物等の異
物を、トナー表面に付着させたマグネタイト等の磁気体
粒子をトナーと共に前記感光体ドラム表面に付着させ感
光体ドラムの表面を研磨することによって取り除いてい
た。<Prior art and its drawbacks> Conventionally, in electrophotographic devices such as copying machines, foreign substances such as oxides and nitrides that adhere to the surface of the photoreceptor drum and deteriorate the image quality are removed by using magnetite or other substances attached to the toner surface. The magnetic particles are attached to the surface of the photoreceptor drum together with the toner and removed by polishing the surface of the photoreceptor drum.
ところが、１−ナー表面に付着したマグネタイト等の磁
性体粒子が長時間の攪拌による摩擦によってトナー表面
から徐々に脱落してしまい感光体ドラム表面に付着でき
な（ムてしまう。そこで少量の脱落によっても感光体ド
ラム表面に付着するように磁性体粒子を多量に添加して
いたが、トナーの帯電量が低下してトナー物性が悪くな
ってしまうという不都合があった。However, magnetic particles such as magnetite attached to the surface of the 1-toner gradually fall off from the toner surface due to friction caused by long-term stirring, and are unable to adhere to the surface of the photoreceptor drum. Also, a large amount of magnetic particles were added so as to adhere to the surface of the photoreceptor drum, but this had the disadvantage that the amount of charge on the toner decreased and the physical properties of the toner deteriorated.
〈発明の目的〉
この発明の目的は、トナー物性を損なうことなく、長時
間の攪拌による摩擦によっても感光体ドラムに付着し、
優れた研磨効果を有する研磨剤を含有する電子写真用現
像剤を提供することにある〈発明の構成および効果〉
この発明は帯電によって感光体ドラム表面に付着するト
ナーと、前記トナーとともに感光体ドラム表面に付着し
感光体ドラム表面を研磨する研磨剤とを含む電子写真用
現像剤において、前記研磨剤を電気抵抗の高い硬質の無
機顔料で構成したことを特徴とする。<Object of the Invention> The object of the invention is to prevent the toner from adhering to the photoreceptor drum even by friction caused by long-term stirring without impairing the physical properties of the toner.
<Structure and Effects of the Invention> An object of the present invention is to provide an electrophotographic developer containing an abrasive having an excellent polishing effect. An electrophotographic developer comprising an abrasive that adheres to the surface of the photoreceptor drum and polishes the surface of the photoreceptor drum, characterized in that the abrasive is made of a hard inorganic pigment with high electrical resistance.
上記のように構成することによってこの発明によれば、
現像剤中に含まれる研磨剤の電気抵抗が性を損なうこと
がない。また、硬質であるため感光体ドラムに対して優
れた研磨効果を有する。According to this invention, by configuring as described above,
The electrical resistance of the abrasive contained in the developer does not impair properties. Moreover, since it is hard, it has an excellent polishing effect on the photoreceptor drum.
〈実施例〉
第２図はこの発明の実施例である電子写真用現像剤を用
いた複写機の概略構成図である。図において、感光体ド
ラム１の周囲には、帯電チャージャ２．現像装置３．転
写・剥離チャージャ４．クリーニング装置５が上記の順
に配置されている。<Embodiment> FIG. 2 is a schematic diagram of a copying machine using an electrophotographic developer according to an embodiment of the present invention. In the figure, a photosensitive drum 1 is surrounded by a charger 2. Developing device 3. Transfer/Peel Charger 4. The cleaning devices 5 are arranged in the above order.
現像装置３は、トナーボックス３０と現像槽３１とから
構成され、トナーボックス３０と現像３１との接合部に
はトナーボックス３０中のトナー３０１を現像槽３１へ
供給するトナー供給ローラ３２が配置されている。現像
槽３１中には、トナー供給ローラ３２によって現像槽３
１へ供給されるトナー３０１と現像槽３１中のキャリー
ｔ−３１１とを攪拌する攪拌ローラ３１２と、現像槽３
１中のトナー３０１を感光体ドラム１へ付着させる現像
ローラ３１３とが配置されている。クリーニング装置５
には、クリーニングプレート５０が感光体ドラム１と当
接して配置されている。The developing device 3 includes a toner box 30 and a developer tank 31, and a toner supply roller 32 that supplies toner 301 in the toner box 30 to the developer tank 31 is arranged at the joint between the toner box 30 and the developer 31. ing. The developer tank 31 is filled with toner by a toner supply roller 32.
a stirring roller 312 that stirs the toner 301 supplied to the developer tank 31 and the carrier T-311 in the developer tank 31;
A developing roller 313 for adhering toner 301 in photoreceptor drum 1 to photoreceptor drum 1 is disposed. Cleaning device 5
A cleaning plate 50 is disposed in contact with the photosensitive drum 1 .
第１図はこの発明の実施例である現像剤中のトナーの製
造工程を示した図である。図中の番号は製造工程を示し
ている。以下製造工程を順を追って説明する。FIG. 1 is a diagram showing the manufacturing process of toner in a developer according to an embodiment of the present invention. Numbers in the figure indicate manufacturing steps. The manufacturing process will be explained step by step below.
（１）樹脂・着色料等の粉体状のトナー原料を混合する
。(1) Mixing powdered toner raw materials such as resin and colorant.
（２）加熱ニーダ等を用い樹脂を溶融または軟化状態に
し、着色料等と均一に混練する。(2) Melt or soften the resin using a heating kneader or the like, and uniformly knead it with a coloring agent or the like.
（３）粉砕を容易にするため冷却する。(3) Cool to facilitate pulverization.
（４） カッターミルやジェットミル等を用い粉砕す
る。(4) Grind using a cutter mill, jet mill, etc.
（５）粒径（トナー粒径）をそろえるために粗大粒径や
微小粒径のトナーを取り除く。(5) In order to make the particle size (toner particle size) uniform, toner with coarse particle size and fine particle size is removed.
（６）トナー粒径に比べ微小粒径の高抵抗でかつ硬質の
無機顔料をトナーに対して０．５〜２０重量％添加する
。(6) 0.5 to 20% by weight of a highly resistive and hard inorganic pigment having a particle size smaller than that of the toner is added to the toner.
（７）トナー粒子と無機顔料を均一に混合する。(7) Uniformly mix toner particles and inorganic pigment.
上記（６）および（７）の工程でトナー粒子に添加され
混合された無機顔料がトナー表面に付着する。The inorganic pigment added and mixed to the toner particles in steps (6) and (7) above adheres to the toner surface.
このトナー表面に無機顔料を付着させたトナーが第２図
に示すトナーボックス３０に充填される上記のように構
成することによりこの実施例によれば、表面に高抵抗で
硬質の無機顔料を付着させたトナー３０１がトナー供給
ローラ３２によって現像槽に供給され、攪拌ローラ３１
２によってキャリヤ３１１と攪拌される。この攪拌によ
ってキャリヤ３１１と摩擦され帯電されるトナー３゜１
は、現像ローラ３１３によって感光体ドラム１の表面に
静電的に付着される。このようにして感光体トラム１の
表面には付着されたトナー３０１のほとんどは転写・剥
離チャージャ４によって感光体ドラム１の表面から用紙
に転写されるが一部は感光体ドラム１の表面に残留する
、すなわち残留トナーとなる。この残留トナーがクリー
ニングブレード５０によって感光体ドラム１の表面と摩
擦され、トナー表面に付着された無機顔料が感光体ドラ
ム１の表面を研磨する。The toner with the inorganic pigment attached to the surface of the toner is filled into the toner box 30 shown in FIG. 2. According to this embodiment, the toner box 30 shown in FIG. The toner 301 is supplied to the developer tank by the toner supply roller 32, and the agitation roller 31
2 and the carrier 311. The toner 3°1 is charged by friction with the carrier 311 due to this stirring.
is electrostatically adhered to the surface of the photoreceptor drum 1 by the developing roller 313. Most of the toner 301 attached to the surface of the photoreceptor tram 1 in this way is transferred from the surface of the photoreceptor drum 1 to the paper by the transfer/peel charger 4, but some remains on the surface of the photoreceptor drum 1. In other words, it becomes residual toner. This residual toner is rubbed against the surface of the photoreceptor drum 1 by the cleaning blade 50, and the inorganic pigment attached to the toner surface polishes the surface of the photoreceptor drum 1.
このようにして、本実施例では感光体ドラム１の表面を
研磨することができるが、添加した無機多量に添加する
と長時間の攪拌によってトナー表面から無機顔料が全て
落下してしまうのを防止することができる。またこの無
機顔料は硬質であるため感光体ドラム表面に対して優れ
た研磨効果がある。In this way, the surface of the photoreceptor drum 1 can be polished in this embodiment, but adding a large amount of the inorganic pigment prevents all of the inorganic pigment from falling off the toner surface due to long-time stirring. be able to. Furthermore, since this inorganic pigment is hard, it has an excellent polishing effect on the surface of the photoreceptor drum.
さらに本発明者等の実験によれば、前記無ａ顔料を例え
ばＣｕＣｒｚ ０４ 、ＣｕＦｅ２Ｏ４，ＣｕＭｎ２０
４のようなスピネル構造を持つ無機顔料とした時、良好
な効果が、得られた。例えば平均粒径１０μｍのトナー
をキャリヤ鉄粉に対して６重量％の割合で混合し高湿中
で接続複写を行ったところ、約３万枚でボケが発生し不
１鮮明な画像しか得られなかった。これに対し、上記同
様のトナーに、０．１〜１．ＯＩＪｍの粒径のスピネル
構造を持つ無機Ｏｎ料を３．０重量％の割合で添加し、
ヘンシエルミギサーで約１分間攪拌したものを、上記同
様キャリヤ鉄粉に対して６重量％の割合で混合し上記同
様高温中で連続複写を行ったところ、５万枚の連続複写
でもボケ・ニジミのない鮮明な画像を得ることができた
。Furthermore, according to the experiments of the present inventors, the a-free pigments were, for example, CuCrz 04 , CuFe2O4, CuMn20
Good effects were obtained when an inorganic pigment with a spinel structure such as No. 4 was used. For example, when a toner with an average particle size of 10 μm was mixed at a ratio of 6% by weight to carrier iron powder and spliced copying was performed in high humidity, blurring occurred after about 30,000 sheets and only poorly clear images were obtained. There wasn't. On the other hand, when the same toner as above was used, 0.1 to 1. Adding an inorganic On material having a spinel structure with a particle size of OIJm at a ratio of 3.0% by weight,
The mixture was stirred for about 1 minute using a Henschel Migisser and mixed at a ratio of 6% by weight to the carrier iron powder as described above. When continuous copying was performed at high temperatures as above, no blurring occurred even after continuous copying of 50,000 sheets I was able to obtain clear images with no blurring.
また、他の実施例として、樹脂や着色料等から構成した
トナーをフェライトキャリヤに対して３゜０重量％の割
合で混合した現像剤を用いて、高湿下で連続複写を行っ
たところ約１万枚で画像全面がニジミ、文字が判別でき
な（なった。これに対し、上記と同様のトナーをフェラ
イトキャリヤに対して３．０重量％の割合で混合したも
のに５．０重量％のスピネル構造を持つ無機顔料を添加
してナウターミキサ−で５分間混合し、上記同様高湿下
で連続複写を行ったところ、１０万枚の連続複写でもボ
ケ・ニジミは全く見られず解明な画像を得ることができ
た。As another example, continuous copying was carried out under high humidity using a developer in which a toner composed of a resin, a colorant, etc. was mixed with a ferrite carrier at a ratio of 3.0% by weight. After 10,000 copies, the entire image was blurred and the characters were unrecognizable.In contrast, when the same toner as above was mixed at a ratio of 3.0% by weight to the ferrite carrier, 5.0% by weight was used. When an inorganic pigment with a spinel structure was added and mixed in a Nauta mixer for 5 minutes, and continuous copying was performed under high humidity as above, no blurring or blurring was observed even after 100,000 copies were made, resulting in clear images. was able to obtain.
以上の実施例で示したようにこの発明によればトナーま
たはトナーとギャリ・〜・に無機類ｌ′４を加えるだけ
で鮮明な画像を得ることができる。As shown in the above embodiments, according to the present invention, a clear image can be obtained simply by adding an inorganic substance l'4 to the toner or the toner and the toner.
第１図はこの発明の実施例である電子写真用現像剤中の
トナーの製造工程を示した図であり、第２図はこの発明
の実施例である電子写真用現像剤を用いた複写機の概略
構成図である。
５０−クリーニングブレード、
３０１−トナー、
３１１−キャリヤ。FIG. 1 is a diagram showing the manufacturing process of toner in an electrophotographic developer, which is an embodiment of the present invention, and FIG. 2 is a diagram showing a copying machine using the electrophotographic developer, which is an embodiment of the present invention. FIG. 50-cleaning blade, 301-toner, 311-carrier.
Claims (1)
と、前記トナーとともに感光体ドラム表面に付着し感光
体ドラム表面を研磨する研磨剤とを含む電子写真用現像
剤において、 前記研磨剤を電気抵抗の高い硬質の無機顔料で構成した
ことを特徴とする電子写真用現像剤。(1) An electrophotographic developer comprising a toner that adheres to the surface of a photoreceptor drum due to electrical charging, and an abrasive agent that adheres to the surface of the photoreceptor drum together with the toner and polishes the surface of the photoreceptor drum, wherein the abrasive agent has an electrical resistance. An electrophotographic developer characterized by being composed of a hard inorganic pigment with a high hardness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61023512A JPS62182755A (en) | 1986-02-05 | 1986-02-05 | Developing agent for electrostatic photography |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61023512A JPS62182755A (en) | 1986-02-05 | 1986-02-05 | Developing agent for electrostatic photography |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62182755A true JPS62182755A (en) | 1987-08-11 |
Family
ID=12112499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61023512A Pending JPS62182755A (en) | 1986-02-05 | 1986-02-05 | Developing agent for electrostatic photography |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62182755A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5395717A (en) * | 1992-05-18 | 1995-03-07 | Kyocera Corporation | Developer for developing latent electrostatic images and method of forming images by using the developer |
-
1986
- 1986-02-05 JP JP61023512A patent/JPS62182755A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5395717A (en) * | 1992-05-18 | 1995-03-07 | Kyocera Corporation | Developer for developing latent electrostatic images and method of forming images by using the developer |
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