JPS58123550A - Electrophotographic developing carrier - Google Patents
Electrophotographic developing carrierInfo
- Publication number
- JPS58123550A JPS58123550A JP57006471A JP647182A JPS58123550A JP S58123550 A JPS58123550 A JP S58123550A JP 57006471 A JP57006471 A JP 57006471A JP 647182 A JP647182 A JP 647182A JP S58123550 A JPS58123550 A JP S58123550A
- Authority
- JP
- Japan
- Prior art keywords
- carrier
- ferrite
- copies
- mgo
- ferrite carrier
- 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
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
- G03G9/10—Developers with toner particles characterised by carrier particles
- G03G9/107—Developers with toner particles characterised by carrier particles having magnetic components
- G03G9/1075—Structural characteristics of the carrier particles, e.g. shape or crystallographic structure
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Compounds Of Iron (AREA)
- Hard Magnetic Materials (AREA)
- Developing Agents For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は電子写真用トナーキャリアに関するものである
。電子写真の現像法としては、カスケード現像法、磁気
ブラシ現像法やその他の方法があるが、キャリアとして
要求される特性は適当な摩擦帯電性をもちトナー粒子を
吸引すると緻密であり粒子の強度が十分で、粒の破壊を
生じさせない粒子が流動性に冨むこと、粒子が均一であ
ること表面の状態が湿度等によって種々の特性が変らず
安定していること、引張り、圧縮強度を有すること、ま
た適切な飽和磁化、透磁率あるいは保磁力を有する等で
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrophotographic toner carrier. Development methods for electrophotography include cascade development, magnetic brush development, and other methods, but the characteristics required for the carrier are appropriate triboelectric charging properties, and when the toner particles are attracted, they are dense and the strength of the particles increases. The particles must have sufficient fluidity and do not cause particle breakage, the particles must be uniform, the surface condition must be stable without changing various properties due to humidity, etc., and the tensile and compressive strength must be high. , and have appropriate saturation magnetization, magnetic permeability, or coercive force.
従来、トナーキャリア粒子として種々の材料が使用され
てきているが、最も多く用いられたものとして鉄粉があ
る。鉄粉の表面を適当な処理をして使用しているが長時
間使用すると粒子の表面が物理的あるいは化学的に変化
し、トナーが付着してしまったりあるいは使用環境の湿
度に敏感になって画像の鮮明度がうすれたりし、寿命は
短いという欠点がある。Conventionally, various materials have been used as toner carrier particles, but iron powder is the most commonly used material. Although the surface of iron powder is used after being appropriately treated, if it is used for a long time, the surface of the particles may change physically or chemically, causing toner to adhere to it or becoming sensitive to the humidity of the usage environment. The drawbacks are that the sharpness of the image may fade and the lifespan is short.
また、ギヤリアとして酸化物磁性材料であるフェライト
を用いることは特開昭５２−５６５３６等で報告されて
いるが、従来のフェライトキャリアは画像特性あるいは
寿命の点で必ずしも満足しうるものではない。Furthermore, although the use of ferrite, which is an oxide magnetic material, as a gear carrier has been reported in Japanese Patent Laid-Open No. 52-56536, etc., conventional ferrite carriers are not necessarily satisfactory in terms of image characteristics or lifespan.
本発明はこれら従来の電子写真用トナーキャリアの欠点
をなくし画像特性の潰れたまた、寿命の長いキャリアを
提供するものである。The present invention eliminates these drawbacks of conventional electrophotographic toner carriers and provides a carrier with improved image characteristics and a long life.
本発明において電気抵抗率は１０３Ωｆｉ、ｌＱｌ”Ω
αが良く、本範囲外では摩擦帯”＋Ｍ量を適当な値に制
御できず、また湿度等の影贅を受けやすく、目的とする
鮮明な画像を得ることは困難である。また飽和磁化の値
は１００ｍｗ’ｔ＜〜８０θｍＶｇが適切でこの値より
小さい場合には磁気四−ルとの吸着力は落ち目標とする
鮮明な画像をうろことは困難である。In the present invention, the electrical resistivity is 103Ωfi, lQl”Ω
α is good, but outside this range, the amount of friction zone "+M" cannot be controlled to an appropriate value, and it is easily affected by humidity etc., making it difficult to obtain the desired clear image. An appropriate value is 100 mw't<~80 θmVg; if it is smaller than this value, the adsorption force with the magnetic four is reduced and it is difficult to obtain a clear image as a target.
またＨｃが１００ｅ以上では粒子そのものが磁石の性質
をもち種々の部品に付着し良い画像は得られない。Moreover, if Hc is 100e or more, the particles themselves have magnetic properties and adhere to various parts, making it impossible to obtain good images.
また透磁率μが１０以下では磁気ロールへの反応が悪く
なり画質に影響を与える。Furthermore, if the magnetic permeability μ is less than 10, the response to the magnetic roll will be poor and the image quality will be affected.
以下実施例によって詳細に説明する。This will be explained in detail below using examples.
実施例１
モル比でＭｇＯ２３％、Ｍｎ０２３％、Ｚｎ０４％さら
にｌＦｅ１０３５０％となるように秤量し混合した。混
合機としてはボールミル、振動ミル、ミキサー等を用い
た。混合粉は８００−１２００７：で仮焼をした。仮焼
した試料はボールミル、振動ミル、アトライター等の粉
砕機を用い粉砕した。粉砕後の粒径は空気透過法を用い
測定した結果平均粒径で０．３〜ｚＯμであった。Example 1 They were weighed and mixed in a molar ratio of 23% MgO, 23% Mn, 4% Zn, and 10350% lFe. As a mixer, a ball mill, a vibration mill, a mixer, etc. were used. The mixed powder was calcined at 800-12007. The calcined sample was pulverized using a pulverizer such as a ball mill, vibration mill, or attritor. The particle size after pulverization was measured using an air permeation method, and the average particle size was 0.3 to zOμ.
粉砕した試料はバインダーとしてＰ、Ｖ、ｋ（ボリヒニ
ルアルコール）の水溶液（Ｐ、ｖ、ｈ量としては０．０
５−５．Ｃ１ｗｔ％）を使用しスプレードライヤー、ニ
ーダ−、ミキサー等の造粒器を用い造粒した。The pulverized sample was prepared using an aqueous solution of P, V, and k (borihinyl alcohol) as a binder (P, v, and h amounts are 0.0
5-5. C1wt%) and was granulated using a granulator such as a spray dryer, kneader, or mixer.
次に粒造粉を１１００〜１４００７：で焼成した。焼成
方・：′：：
法としてはアルミナ等の容器に造粒粉を入れて焼成して
も良いが多皿に容器に入れて焼成する場合には焼成の際
に粒成長し、粒同志が接合する場合３ 。Next, the granulated powder was fired at a temperature of 1100 to 14007. Firing method: As a method, you can put the granulated powder in a container such as alumina and fire it, but if you put it in a multi-plate container and fire it, the grains will grow during firing and the grains will not stick together. 3 when joining.
があるためローターギルン等で試料を回転しながら焼成
しても良い。このようにして得られた７エこの球状フェ
ライトをトナーキャリアとして使用しコピーした結果、
従来の鉄分キャリアは約１０，０００枚、フェライトキ
ャリア５α０００枚に対し、本発明キャリアを用いるこ
とにより７α０００〜１００．０００枚の鮮明なコピー
が可能であった。Therefore, the sample may be fired while being rotated using a rotor gilt or the like. As a result of copying using the thus obtained spherical ferrite as a toner carrier,
By using the carrier of the present invention, it was possible to make clear copies of 7α,000 to 100,000 copies, compared to about 10,000 copies with the conventional iron carrier and 5α,000 copies with the ferrite carrier.
実施例２
Ｍｇ０． ＡＡｇＯａ −、ＺｎＯおよびＦｅ＋Ｏｎを
下記組成に秤量し実施例１と同様に試料を作成した。単
位はモル％である。Example 2 Mg0. A sample was prepared in the same manner as in Example 1 by weighing AAgOa −, ZnO, and Fe+On into the following composition. The unit is mol%.
次にこれら試料の特性を測定した結果次のようになった
。Next, the characteristics of these samples were measured and the results were as follows.
次にこれら試料ＡＢおよび０について球状化し焼成し、
トナーキャリアとして使用しコピーテストを行った結果
、従来の鉄粉を用いた場合のｌα０００枚および通常の
フェライトキャリアの５ｏ、ｏｏｏ枚の寿命に対して、
７０，０００〜１００，０００枚の鮮明なコピーが可能
であり、またコピー装置の環境による依存性も０
はとんどないことがわかった。Next, these samples AB and 0 were spheroidized and fired,
As a result of a copy test using it as a toner carrier, the lifespan of lα000 sheets when using conventional iron powder and 5o and 00 sheets of a normal ferrite carrier,
It has been found that 70,000 to 100,000 clear copies can be made, and that dependence on the environment of the copying device is almost zero.
このように本発明によるフェライトキャリアは鮮明な画
像を得られる寿命が非常に長くなり外的環境依存性も極
めて少く、この工業的意義は大である。As described above, the ferrite carrier according to the present invention has a very long service life at which clear images can be obtained, and has very little dependence on the external environment, which has great industrial significance.
５5
Claims (1)
％、Ｆｅ２０５４５％〜６０％、ｚｎＯ０１％〜３０％
からなり電気抵抗率１０１ΩｃＩＩＬＡ１０１１ＩΩα
で飽和磁化値が１５ｅｍｕ／ｇ、 ８０ｅｍ＄ｇの特性
ト を有し、平均粒径が５μｍ ７％７５００μｍの球状の
７エライ７キヤリア。 ２、特許請求の範囲第１項記載のものにおいて、保磁力
Ｈｏ１ＯＯｅ以下であることを特徴とするフェライトキ
ャリア。 ３、 特許請求の範囲第１項記載のものにおいて透磁率
μｍ０以上であることを特徴とするフェライトキャリア
。 本 特許請求の範囲第１項記載のものにおいてキ１へ ユリ一温度ＴＯが５０Ｃ以上であることを特徴とするフ
ェライトキャリア。 ５、 特許請求の範囲第１〜第４項記載のものにおいて
粒子の表面を酸化させたことを特徴とするフェライトキ
ャリア。 ６、 特許請求の範囲第１〜第４項記載のものにお。 いて、粒子の表面を樹脂等で被覆したことを特徴とする
フェライトキャリア。[Claims] L molar ratio MgO 1% to 40%, Mn00 5% to 30
%, Fe20545%~60%, znO01%~30%
It consists of electrical resistivity 101ΩcIILA1011IΩα
A spherical 7-element 7-carrier with a saturation magnetization value of 15 emu/g and 80 em $g, and an average particle size of 5 μm and 7% 7500 μm. 2. A ferrite carrier according to claim 1, characterized in that the coercive force is less than Ho1OOe. 3. A ferrite carrier according to claim 1, characterized in that it has a magnetic permeability of μm0 or more. A ferrite carrier according to claim 1, characterized in that the temperature TO is 50C or higher. 5. A ferrite carrier according to claims 1 to 4, characterized in that the surface of the particles is oxidized. 6. Claims 1 to 4. A ferrite carrier characterized in that the surface of the particles is coated with a resin or the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57006471A JPS58123550A (en) | 1982-01-19 | 1982-01-19 | Electrophotographic developing carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57006471A JPS58123550A (en) | 1982-01-19 | 1982-01-19 | Electrophotographic developing carrier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58123550A true JPS58123550A (en) | 1983-07-22 |
Family
ID=11639364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57006471A Pending JPS58123550A (en) | 1982-01-19 | 1982-01-19 | Electrophotographic developing carrier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58123550A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58145622A (en) * | 1982-02-12 | 1983-08-30 | Tdk Corp | Magnetic carrier particle |
| JPS58145621A (en) * | 1982-02-12 | 1983-08-30 | Tdk Corp | Magnetic carrier particle |
| JPS6090345A (en) * | 1983-10-24 | 1985-05-21 | Fuji Xerox Co Ltd | Developer carrier for electrophotographic copying machine |
| US4592988A (en) * | 1984-08-15 | 1986-06-03 | Halomet, Inc. | Ferrite toner carrier core composition derived from fly ash |
| US4698289A (en) * | 1984-08-15 | 1987-10-06 | Halomet Inc. | Process for making ferrite spherical particulate toner core from raw fly ash |
| JPS63216060A (en) * | 1987-03-05 | 1988-09-08 | Hitachi Metals Ltd | Carrier particles for developing electrostatic charge image |
| JPS63220258A (en) * | 1987-03-10 | 1988-09-13 | Hitachi Metals Ltd | Electrostatic charge image developer |
| JPH01301524A (en) * | 1988-05-28 | 1989-12-05 | Fuji Elelctrochem Co Ltd | Magnesium-zinc-based ferrite material |
| JPH02267566A (en) * | 1989-04-10 | 1990-11-01 | Tomoegawa Paper Co Ltd | Developer for reversal development |
| JP2005181944A (en) * | 2003-03-13 | 2005-07-07 | Ricoh Co Ltd | Electrostatic latent image developing carrier, developer, developer container, image forming method, and processing cartridge |
| JP2015182905A (en) * | 2014-03-20 | 2015-10-22 | パウダーテック株式会社 | Ferrite particle for functional powder transportation |
| WO2016043051A1 (en) * | 2014-09-19 | 2016-03-24 | パウダーテック株式会社 | Nanosized spherical ferrite particles and method for manufacturing same |
-
1982
- 1982-01-19 JP JP57006471A patent/JPS58123550A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58145621A (en) * | 1982-02-12 | 1983-08-30 | Tdk Corp | Magnetic carrier particle |
| JPS6237782B2 (en) * | 1982-02-12 | 1987-08-14 | Tdk Electronics Co Ltd | |
| JPS6237783B2 (en) * | 1982-02-12 | 1987-08-14 | Tdk Electronics Co Ltd | |
| JPS58145622A (en) * | 1982-02-12 | 1983-08-30 | Tdk Corp | Magnetic carrier particle |
| JPH0419546B2 (en) * | 1983-10-24 | 1992-03-30 | Fuji Zerotsukusu Kk | |
| JPS6090345A (en) * | 1983-10-24 | 1985-05-21 | Fuji Xerox Co Ltd | Developer carrier for electrophotographic copying machine |
| US4592988A (en) * | 1984-08-15 | 1986-06-03 | Halomet, Inc. | Ferrite toner carrier core composition derived from fly ash |
| US4698289A (en) * | 1984-08-15 | 1987-10-06 | Halomet Inc. | Process for making ferrite spherical particulate toner core from raw fly ash |
| JPS63216060A (en) * | 1987-03-05 | 1988-09-08 | Hitachi Metals Ltd | Carrier particles for developing electrostatic charge image |
| JPS63220258A (en) * | 1987-03-10 | 1988-09-13 | Hitachi Metals Ltd | Electrostatic charge image developer |
| JPH01301524A (en) * | 1988-05-28 | 1989-12-05 | Fuji Elelctrochem Co Ltd | Magnesium-zinc-based ferrite material |
| JPH02267566A (en) * | 1989-04-10 | 1990-11-01 | Tomoegawa Paper Co Ltd | Developer for reversal development |
| JP2005181944A (en) * | 2003-03-13 | 2005-07-07 | Ricoh Co Ltd | Electrostatic latent image developing carrier, developer, developer container, image forming method, and processing cartridge |
| JP2015182905A (en) * | 2014-03-20 | 2015-10-22 | パウダーテック株式会社 | Ferrite particle for functional powder transportation |
| WO2016043051A1 (en) * | 2014-09-19 | 2016-03-24 | パウダーテック株式会社 | Nanosized spherical ferrite particles and method for manufacturing same |
| JPWO2016043051A1 (en) * | 2014-09-19 | 2017-04-27 | パウダーテック株式会社 | Nano-sized spherical ferrite particles and method for producing the same |
| US10593454B2 (en) | 2014-09-19 | 2020-03-17 | Powdertech Co., Ltd. | Spherical ferrite particles in nano-size and method of manufacturing same |
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