JPS58123555A - Electrophotographic developing carrier - Google Patents
Electrophotographic developing carrierInfo
- Publication number
- JPS58123555A JPS58123555A JP57006476A JP647682A JPS58123555A JP S58123555 A JPS58123555 A JP S58123555A JP 57006476 A JP57006476 A JP 57006476A JP 647682 A JP647682 A JP 647682A JP S58123555 A JPS58123555 A JP S58123555A
- Authority
- JP
- Japan
- Prior art keywords
- particles
- ferrite carrier
- mol
- bao
- saturation magnetization
- 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.)
- Granted
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)
- Developing Agents For Electrophotography (AREA)
- Compounds Of Iron (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は″阻子写與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かあるが、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、緻密でむ。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a toner carrier for photocopying.As developing methods for electrophotography, there are cascade developing method, magnetic brush developing method, and other methods. The characteristics of this material are appropriate triboelectric charging properties, and when toner particles are attracted, they become dense.
あり粒子の強度が十分で、粒の破壊を生でさせな！５
い粒子が流動性に褐むこと、粒子が均一であること、表
面の状態が温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。The strength of the particles is sufficient and the particles will not be destroyed! 5. The particles must be fluid and brown, the particles must be uniform, the surface condition must be stable so that various properties do not change due to temperature etc., the tensile and compressive strength must be high, and the saturation magnetization must be appropriate. , have magnetic permeability or coercive force, etc.
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か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 drawback is that the image clarity may fade and the lifespan is short.
また、キャ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、従来のフェライトギヤ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 carrier has been reported in Japanese Patent Laid-Open No. 52-56536, etc., conventional ferrite gears 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医れた、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 long life.
本発明において、電気抵抗率は１０６Ωに以上が良く、
本範囲外ではｗ、擦帯ｗｉｋを適当な値に制御できず、
また湿度等の１智を受４ｊ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４５
ａｍｏｇ〜６５θ＋ｎｖ’ｇが適切でこの値より小さい
場合には磁気ロールとの吸着力は落ち目標とする鮮明な
画像をうることは困難である。In the present invention, the electrical resistivity is preferably 106Ω or more,
Outside this range, it is not possible to control the friction band wik to an appropriate value,
In addition, it is easily affected by factors such as humidity, making it difficult to obtain the desired clear image. Also, the value of saturation magnetization is 45
amog~65θ+nv'g is appropriate, and if it is smaller than this value, the adsorption force with the magnetic roll will decrease and it will be difficult to obtain the desired clear image.
また、Ｈｃか１．００％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尤し良い画像は得られない。Furthermore, if Hc is 1.00% or more, the particles themselves have magnetic properties and are attached to various parts, making it impossible to obtain good images.
また透磁率μが５０以下では磁気ロールへの反応が悪く
なり画質に１智を与える。Furthermore, if the magnetic permeability μ is less than 50, the response to the magnetic roll will be poor, which will affect the image quality.
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ＢａＯ２モル％ 、Ｚｎ０２３モル％、ＭｎＯ
３モル％ □に１Ｂ ０３１モル％、０ａＯ１モ
ル％とＦｅａ０３６５モル％となるように秤組し混合し
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８００〜１２００ Ｃ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約””ｉ、ｏμ・であっ
た。Example 1 Molar ratio: BaO2 mol%, Zn023 mol%, MnO
3 mol % □, 1B 031 mol %, 0aO 1 mol % and Fea 0 365 mol % were weighed and mixed. As a mixer, a ball mill, a vibration mill, a mixer, etc. were used. The mixed powder was calcined at 800-1200C. 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 about ""i,oμ.
粉砕した試料はバインダーとしてＰ、Ｖ、Ａ （ポリビ
ニルアルコール）の水溶液（Ｐ、Ｖ、Ａ量としてはα０
５−５．０ｗｔ％）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 A (polyvinyl alcohol) as a binder (the amounts of P, V, and A are α0).
5-5.0 wt%) and granulated using a granulator such as a spray dryer, kneader, or mixer.
次に粒造粉を１３００ Ｃで焼成した。焼成方法としで
はアルミナ等の容器に造粒粉を入れて焼成して。The granulated powder was then fired at 1300C. The firing method involves putting granulated powder in a container such as alumina and firing it.
も良いが多短に容器に入れて焼成する場合には焼、。It is also good, but if you want to bake it in a container, you can bake it.
成の際に粒成長し、粒同志か接合する場合があるためロ
ーターキルン等で試料を回転しながら焼成しても良い。Since the grains may grow and join together during the deposition, the sample may be fired while being rotated in a rotor kiln or the like.
このようにして得られたフェライトしコピーした結果、
従来の鉄粉キャリアは約１０．０００枚、フェライトキ
ャリアｍ、ｏｏｏ枚に対し、本発明キ゛ヤリアを用いる
ことにより７０，０００〜１００，０００枚の鮮明なコ
ピーが可能であった。 （５実施例
２
モル比でＢａＯ３モル％、Ｚｎ０２０モル％ 、ＭｇＣ
１１モル％゛Ｌｉ２Ｏ１モル％、Ｎｉ０３モル％とＦθ
、０． モル％となるように秤量し実施例１と同様に
球状のフェライト。As a result of copying the ferrite obtained in this way,
By using the carrier of the present invention, it was possible to make 70,000 to 100,000 clear copies, compared to about 10,000 copies with conventional iron powder carriers and m, ooo copies with ferrite carriers. (5 Example 2 Molar ratio: 3 mol% BaO, 20 mol% Zn0, MgC
11 mol%゛Li2O1 mol%, Ni03 mol% and Fθ
, 0. Spherical ferrite was weighed in the same manner as in Example 1 to give mol%.
を作成した。この球状フェライトをトナーキャリアとし
てコピー試験を加えた結果、実施例１と同様のコピー性
能を得た。It was created. A copying test was conducted using this spherical ferrite as a toner carrier, and as a result, the same copying performance as in Example 1 was obtained.
以上の如く本発明フェライトキャリアは従来使用式れて
いる鉄粉キャリ、アに比べ、高抵抗でやや長寿命である
ことが判明し、電子複写機用の現像材として卓越した効
果を示しその工業的応用価値は大である。As described above, it has been found that the ferrite carrier of the present invention has a higher resistance and a slightly longer life than the conventionally used iron powder carrier, and has an outstanding effect as a developing material for electronic copying machines. It has great practical value.
Claims (1)
モル％〜３０モル％、丁８８０５５５モル％〜７０モル
％の基本組成のＢａＯの一部をＬｉｌｌＯｌＭｎＯ１０
１１０、Ａｔ、ｏ ５ 、ｌＪｉ、ｏ ％ ＭｇＯの２
種又は２種以上で置換した組成において電気抵抗率１０
５Ωα以上で飽和磁化値が４５ ｅｍｙ’ｇ、 ６５０
ｍｍｇの特性を有し、平均粒径が３０μｍ〜１０００μ
ｍの球状のフェライトキャリア。 ２、特許請求の範囲第１項記載のものにおいて、保磁力
Ｈｃ１．、ＯＯθ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
μ５０以上であることを特徴とするフェライトキャリア
。 ４ 特ｔ！を請求の範囲第１項記載のものにおいてキュ
キリ一温度Ｔｃが２００Ｃ以上であることを特徴とする
フェライトキャリア。 ５、 特１ｉｆｉ求の範ｕＩＭ第１項記載のものにおい
て粒子の強度がＩＱＯＯｇ／ｃｉ以上であることを特徴
と°するフェライトキャリア。 ６、 特許請求の範囲第１〜第５項記載のものにおいて
粒子の表面を酸化式せたことを特徴とするフェライトキ
ャリア。 ７、 特Ｆｌ’請求の範囲第１−第５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 of BaO 3 mol% to 30 mol%, 29010
LillOlMnO10
110, At, o5, lJi, o% MgO2
Electrical resistivity 10 in compositions substituted with one species or two or more species
At 5Ωα or more, the saturation magnetization value is 45 emy'g, 650
mmg, with an average particle size of 30μm to 1000μm
m spherical ferrite carrier. 2. In the product described in claim 1, the coercive force Hc1. , OOθ or less. 3. A ferrite carrier according to claim 1, characterized in that it has a magnetic permeability μ50 or more. 4 Special T! A ferrite carrier according to claim 1, wherein the ferrite carrier has a temperature Tc of 200C or more. 5. A ferrite carrier according to Item 1 of the ferrite carrier, characterized in that the strength of the particles is IQOOg/ci or more. 6. A ferrite carrier according to claims 1 to 5, characterized in that the surface of the particles is oxidized. 7. A ferrite carrier according to claims 1 to 5, characterized in that the surfaces of the particles are coated with a resin or the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57006476A JPS58123555A (en) | 1982-01-19 | 1982-01-19 | Electrophotographic developing carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57006476A JPS58123555A (en) | 1982-01-19 | 1982-01-19 | Electrophotographic developing carrier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58123555A true JPS58123555A (en) | 1983-07-22 |
| JPH0358110B2 JPH0358110B2 (en) | 1991-09-04 |
Family
ID=11639516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57006476A Granted JPS58123555A (en) | 1982-01-19 | 1982-01-19 | Electrophotographic developing carrier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58123555A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58145622A (en) * | 1982-02-12 | 1983-08-30 | Tdk Corp | Magnetic carrier particle |
| JPS59210528A (en) * | 1983-05-13 | 1984-11-29 | Matsushita Electric Ind Co Ltd | Tracking method |
| JPS6090345A (en) * | 1983-10-24 | 1985-05-21 | Fuji Xerox Co Ltd | Developer carrier for electrophotographic copying machine |
| JPS6136761A (en) * | 1984-07-30 | 1986-02-21 | Mita Ind Co Ltd | Color developing method of electrophotography |
| JPH02228674A (en) * | 1989-03-01 | 1990-09-11 | Tomoegawa Paper Co Ltd | Developer for reversal development |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5056946A (en) * | 1973-09-05 | 1975-05-19 | ||
| JPS5256536A (en) * | 1975-10-29 | 1977-05-10 | Xerox Corp | Non humidityysensitive electrophotography carrier material made of ferrite and method of producing |
-
1982
- 1982-01-19 JP JP57006476A patent/JPS58123555A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5056946A (en) * | 1973-09-05 | 1975-05-19 | ||
| JPS5256536A (en) * | 1975-10-29 | 1977-05-10 | Xerox Corp | Non humidityysensitive electrophotography carrier material made of ferrite and method of producing |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58145622A (en) * | 1982-02-12 | 1983-08-30 | Tdk Corp | Magnetic carrier particle |
| JPS6237783B2 (en) * | 1982-02-12 | 1987-08-14 | Tdk Electronics Co Ltd | |
| JPS59210528A (en) * | 1983-05-13 | 1984-11-29 | Matsushita Electric Ind Co Ltd | Tracking method |
| JPH0512764B2 (en) * | 1983-05-13 | 1993-02-18 | Matsushita Electric Ind Co Ltd | |
| JPS6090345A (en) * | 1983-10-24 | 1985-05-21 | Fuji Xerox Co Ltd | Developer carrier for electrophotographic copying machine |
| JPH0419546B2 (en) * | 1983-10-24 | 1992-03-30 | Fuji Zerotsukusu Kk | |
| JPS6136761A (en) * | 1984-07-30 | 1986-02-21 | Mita Ind Co Ltd | Color developing method of electrophotography |
| JPH02228674A (en) * | 1989-03-01 | 1990-09-11 | Tomoegawa Paper Co Ltd | Developer for reversal development |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0358110B2 (en) | 1991-09-04 |
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