JPS58123554A - Electrophotographic developing carrier - Google Patents
Electrophotographic developing carrierInfo
- Publication number
- JPS58123554A JPS58123554A JP57006475A JP647582A JPS58123554A JP S58123554 A JPS58123554 A JP S58123554A JP 57006475 A JP57006475 A JP 57006475A JP 647582 A JP647582 A JP 647582A JP S58123554 A JPS58123554 A JP S58123554A
- Authority
- JP
- Japan
- Prior art keywords
- mol
- particles
- ferrite carrier
- zno
- 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.)
- 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)
- Developing Agents For Electrophotography (AREA)
- Compounds Of Iron (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は電子写真用トナーキャリアに関するも1()
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 a toner carrier for electrophotography. 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 toner particles are attracted, they are dense and the strength of the particles increases. is sufficient,
The particles must have high fluidity without causing grain breakage, the particles must be uniform, the surface condition must be stable without changing various properties due to humidity, etc., and the particles must have tensile and compressive strength. It has 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。Conventionally, various materials have been used as toner carrier particles.
使用されてきているが、最も多く用いられたもの。It has been used, but it is the most commonly used.
とじて鉄粉がある。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。There is iron filings. 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、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1゜さ
れているが、従来の7エライトキ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。In addition, 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., but the conventional 7-elite carrier is not necessarily satisfactory in terms of image characteristics or lifespan. isn't it.
本発明はこれら従来のt子写真用トナーキャリアの欠点
をなくし画像特性の曖れた、また寿命の14゜
長いキャリアを提供するものである。The present invention eliminates these drawbacks of conventional toner carriers for photographic use and provides a carrier with vague image characteristics and a 14° longer life.
本発明において電気抵抗率は108ΩG〜1012Ωα
が良く、本範囲外では*擦帯電証を適当な値に制御でき
ず、また湿度等の影春を受けやすく、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45
emu@ N70θmrgが適切でこの値よ。In the present invention, the electrical resistivity is 108ΩG to 1012Ωα
However, outside this range, it is impossible to control the friction charge to an appropriate value, and it is susceptible to the effects of humidity, etc., making it difficult to obtain the desired clear image. Also, the value of saturation magnetization is 45
emu@N70θmrg is the appropriate value.
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。If the magnetic roll is small, the adhesion force with the magnetic roll decreases, making it difficult to obtain the desired clear image.
またHOが1.00θ以上でに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−くな
り画質に影會を与える。Furthermore, when HO is greater than 1.00θ, the particles themselves have magnetic properties and adhere to various parts, making it impossible to obtain good images and affecting 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1.i、05モル%、Zn010モル%、Fe
50%72モルしてはボールミル、振動ミル、ミキサー
等を用いた。混合粉は800−11200 Uで仮焼を
した。仮焼した!5
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
したー′果平均粒径で約LOμ・であった°。Example 1 Molar ratio: 1. i, 05 mol%, Zn010 mol%, Fe
A ball mill, a vibration mill, a mixer, etc. were used to prepare the mixture at 50% and 72 mol. The mixed powder was calcined at 800-11200 U. Calcined! 5 The 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 approximately LOμ.
粉砕した試料はバインダーとしてP、V、A (ボリヒ
ニルアルコール)の水溶液(P、v、A量としては0.
05−5.0wt%)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 contained an aqueous solution of P, V, and A (borihinyl alcohol) as a binder (the amounts of P, v, and A were 0.
05-5.0wt%) using a spray dryer,
The mixture was granulated using a granulator such as a kneader or mixer. .
次に粒造粉を1150 Gで焼成した。焼成方法とし。Next, the granulated powder was fired at 1150G. As for the firing method.
ではアルミナ等の容器に造粒粉を入れて焼成しても良い
が多量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。このように
して得られたフェライトの特性を示す。Then, you can put granulated powder in a container such as alumina and fire it, but if you put a large amount of powder in a container and fire it, the grains may grow during firing and curing, and the grains may join together, so rotor kiln is not recommended. The sample may be fired while rotating. The characteristics of the ferrite thus obtained are shown below.
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50,000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。Using this spherical ferrite as a toner carrier, the number of copies made using a conventional iron carrier is approximately 10,000 sheets.
By using the carrier of the present invention, clear copies of 7α000 to 100,000 sheets were possible compared to 50,000 sheets using the ferrite carrier.
実施例2
モル比でLi、05モル% 、x1o5モル% 、Fa
lQ3’7’7モル%の基本組成にZn07モル%、A
t1Oi3モル%となるように秤量し実施例と同様に球
状のフェライトを作成した。この球状フェライトトナー
キャリアと。Example 2 Li, 05 mol%, x1o5 mol%, Fa in molar ratio
Basic composition of lQ3'7'7 mol%, Zn07 mol%, A
It was weighed so that t1Oi was 3 mol%, and spherical ferrite was produced in the same manner as in the example. With this spherical ferrite toner carrier.
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。As a result, copying performance similar to that of Example 1 was obtained.
以上の如く、本発明のフェライトキャリアは従来使用き
れている鉄粉キャリアに比べ高抵抗でかつ長寿命である
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, the ferrite carrier of the present invention has been found to have higher resistance and longer life than conventionally used iron powder carriers, and has shown outstanding effectiveness as a developing material for electronic copying machines, and has been found to be useful in industrial applications. It has great application value.
Claims (1)
3モル%〜17モル%、Fe10370モル%〜80モ
ル%カラナル基本組成のL120とNiOのl柚又は2
種をMnO,職01■0、At20.の2種又は2種以
上で一部置換した組成において電気抵抗率10”ΩOI
〜1012Ωσで飽和磁化値が45emx/g、 70
emtl/gの特性を有し、平均粒径が30μm〜10
00μm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.QOe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
850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1EI記載のものにおいてキュリ
一温度’IQが300C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項記載のものにおいて粒子の
強度が:coookg/i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
粒子の表面を酸化させたことを特徴とするフェライトキ
ャリア。 7、 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 I, 1a05 mol% to 15 mol%, ZnO
3 mol% to 17 mol%, Fe10370 mol% to 80 mol% caranal basic composition of L120 and NiO or 2
Seed is MnO, job 01■0, At20. Electrical resistivity 10"ΩOI in a composition partially substituted with two or more of
The saturation magnetization value is 45emx/g at ~1012Ωσ, 70
emtl/g, with an average particle size of 30 μm to 10
00μm spherical ferrite carrier. 2. In the product described in claim 1, the coercive force Hc1. A ferrite carrier characterized by a QOe or lower. 3. A ferrite carrier according to claim 1, characterized in that it has a magnetic permeability of 850 or more. A ferrite carrier according to claim 1 EI, characterized in that it has a Curie temperature 'IQ of 300C or more. 5. The product described in claim 1 is characterized in that the strength of the particles is: coookg/i or more. Ferrite carrier. 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 surface of the particles is coated with a resin or the like.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57006475A JPS58123554A (en) | 1982-01-19 | 1982-01-19 | Electrophotographic developing carrier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57006475A JPS58123554A (en) | 1982-01-19 | 1982-01-19 | Electrophotographic developing carrier |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS58123554A true JPS58123554A (en) | 1983-07-22 |
Family
ID=11639485
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57006475A Pending JPS58123554A (en) | 1982-01-19 | 1982-01-19 | Electrophotographic developing carrier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58123554A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6090345A (en) * | 1983-10-24 | 1985-05-21 | Fuji Xerox Co Ltd | Developer carrier for electrophotographic copying machine |
JPS60227270A (en) * | 1984-04-26 | 1985-11-12 | Fuji Elelctrochem Co Ltd | Ferrite carrier material for electrostatic copying |
-
1982
- 1982-01-19 JP JP57006475A patent/JPS58123554A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 | |
JPS60227270A (en) * | 1984-04-26 | 1985-11-12 | Fuji Elelctrochem Co Ltd | Ferrite carrier material for electrostatic copying |
JPH0428304B2 (en) * | 1984-04-26 | 1992-05-14 | Fuji Electrochemical Co Ltd |
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