JPS58123552A - Electrophotographic developing carrier - Google Patents
Electrophotographic developing carrierInfo
- Publication number
- JPS58123552A JPS58123552A JP57006473A JP647382A JPS58123552A JP S58123552 A JPS58123552 A JP S58123552A JP 57006473 A JP57006473 A JP 57006473A JP 647382 A JP647382 A JP 647382A JP S58123552 A JPS58123552 A JP S58123552A
- Authority
- JP
- Japan
- Prior art keywords
- ferrite carrier
- particles
- saturation magnetization
- carrier
- mol
- 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０
のである。を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５
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 also relates to a toner carrier for electrophotography. There are cascade development methods, magnetic brush development methods, and other methods for developing photographs, 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 is high. The particles must have sufficient fluidity to prevent 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. It also 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.
開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。Iron powder is one of the most widely used materials. 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 changes physically or chemically, toner adheres to it, and it becomes sensitive to the humidity of the usage environment. The drawbacks are that the sharpness of the image becomes blurred 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５２−１）５５３６等で層高。Furthermore, the use of ferrite, which is an oxide magnetic material, as a carrier is disclosed in Japanese Patent Application Laid-Open No. 52-1) 5536.
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。However, 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慶れた、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 toner carriers for electrophotography and provides a carrier with excellent image characteristics and a long life.
本発明において、電気抵抗率は１０δΩα以上が良く、
本範囲外では摩擦帯電量を適当な値に制御できず、また
湿度等の影響を受けやすく、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４１５ｅｍｕ
／ｇ〜６５ｅｍｕ／ｇが適切でこの値より小。In the present invention, the electrical resistivity is preferably 10δΩα or more,
Outside this range, the amount of triboelectric charge cannot be controlled to an appropriate value and is susceptible to the effects of humidity, etc., making it difficult to obtain the desired clear image. Also, the value of saturation magnetization is 415 emu
/g to 65emu/g is appropriate and smaller than this value.
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 small cases, the adhesion force with the magnetic roll decreases, making it difficult to obtain the desired clear image.
またＨＯが１．００ｓ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。Furthermore, if the HO is longer than 1.00 seconds, 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５０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 50, 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.
％、さらにＱｕ０３モル％ 、ＺｎＯ３モル％とＮ１０
５モル％となるように秤皿し混合した。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。混合だ。%, further Qu03 mol%, ZnO3 mol% and N10
The mixture was mixed using a weighing plate so that the concentration was 5 mol%. As a mixer, a ball mill, a vibration mill, a mixer, etc. were used. It's a mixture.
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１．０μ二であった。The particle size after pulverization was measured using an air permeation method, and the average particle size was about 1.0 μm.
粉砕した試料はバインダーとしてＰ、Ｖ、Ａ （ポリヒ
ニルアルコール）の７Ｋｆｔｊ液（Ｐ、Ｖ、Ａ門トして
はα０５−５．０ｗｔ％）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 processed using a spray dryer, kneader, mixer, etc. using a 7Kftj solution of P, V, and A (polyhinyl alcohol) (α05-5.0 wt% for P, V, and A) as a binder. It was granulated using a granulator.
次に粒造粉を１３５０Ｃ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
に苅し、本発明キャリアを用いることにより７０．００
０〜１００，０００枚の鮮明なコピーが可能であった。Next, the granulated powder was fired at 1350C. As a firing method, granulated powder may be placed in a container such as alumina and fired, but if a large amount is placed in a container and fired, grains may grow during firing and the grains may join together, so a rotor is used. The sample may be fired while rotating in a kiln or the like. The thus obtained ferrite This spherical ferrite was used as a toner carrier, and as a result of copying, approximately 10,000 sheets of conventional iron carrier and 50,000 sheets of ferrite carrier were used, and by using the carrier of the present invention, 70.00
Clear copies of 0 to 100,000 sheets were possible.
実施例２
モル比でＭｎ０３０モル％、Ｍｇ０７モル％ 、Ｆｅ１
ｏ１１４９モル％さらニＩｄＨ０２％ ／ｌ’ ％ 、
Ａｌ ｓ Ｏｎ ２ ％ Ａ’％、Ｚｎ０ＩＯモル％と
なるように秤量し実施例１と同様に球状のフエ・ ４
ライトを作成した。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。Example 2 Mn030 mol%, Mg07 mol%, Fe1 in molar ratio
o1149 mol% SaraniIdH02%/l'%,
A spherical ferrite was prepared in the same manner as in Example 1 by weighing so as to give AlsOn2%A'% and Zn0IO mol%. 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され
ている鉄粉キャリアに比べ、高抵抗でか一つ長寿命であ
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 a longer lifespan than conventionally used iron powder carriers, and has been shown to be extremely effective as a developing material for electronic copying machines. It has great practical value.
Claims (1)
モル％λ 〜旭５モル％ 、Ｆｅ１０５４５モル％〜６５モル％の
ＭｎＯもしくはＭｇＯの１種又は２種をＯｕｒ、ＺｎＯ
、ＡＬ＊Ｏ＊ 、Ｌ ｉ ｓ Ｏ、Ｍｌｏ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”Ω
α以上で飽和磁化値が４δθｍｔＡ、 ６５０服／ｇの
特性を有し、平均粒径が３０μｍ〜１０．００−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
ＨｃＬＯＯｅ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■ＭＨ
ｚ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。 本 特許請求の範囲第１項記載のものにおいてキュリ一
温度Ｔｃが１０００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ｌｏｏｏｇ ／♂以−ヒ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ｍ１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 Mn020 mol% to 40 mol%, Mg05
Our, ZnO
, AL*O*, L i s O, Mlo or 2
Electrical resistivity 10”Ω in a composition partially substituted with more than one species
A spherical ferrite carrier having a saturation magnetization value of 4 δ θ mtA at α or more, 650 magnetization/g, and an average particle size of 30 μm to 10.00 μm. 2. A ferrite carrier according to claim 1, characterized in that its coercive force is HcLOOe or less. 3. In the matter described in claim 1, ■MH
A ferrite carrier characterized by having a z magnetic permeability of μ50 or more. A ferrite carrier according to claim 1, characterized in that the Curie temperature Tc is 1000 or more. 5. The product described in claim 1 is characterized in that the strength of the particles is less than looog/male. 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 m1 of the particles is coated with a resin or the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57006473A JPS58123552A (en) | 1982-01-19 | 1982-01-19 | Electrophotographic developing carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57006473A JPS58123552A (en) | 1982-01-19 | 1982-01-19 | Electrophotographic developing carrier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58123552A true JPS58123552A (en) | 1983-07-22 |
Family
ID=11639424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57006473A Pending JPS58123552A (en) | 1982-01-19 | 1982-01-19 | Electrophotographic developing carrier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58123552A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58145622A (en) * | 1982-02-12 | 1983-08-30 | Tdk Corp | Magnetic carrier particle |
| JPS58145625A (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 |
| JPS60135958A (en) * | 1983-12-23 | 1985-07-19 | Toda Kogyo Corp | Spherical magnetic carrier particles and their manufacture |
| JPS61500577A (en) * | 1983-12-05 | 1986-03-27 | ハネウエル・インコ−ポレ−テツド | Semiconductor pad area protection structure |
| JPH02267566A (en) * | 1989-04-10 | 1990-11-01 | Tomoegawa Paper Co Ltd | Developer for reversal development |
| EP0689100A1 (en) | 1994-06-22 | 1995-12-27 | Canon Kabushiki Kaisha | Carrier for electrophotography, two component type developer, and image forming method |
| US5976747A (en) * | 1998-01-08 | 1999-11-02 | Powdertech Co., Ltd. | Ferrite carrier for electrophotographic developer and electrophotographic developer containing the same |
| 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 |
| EP1589381A2 (en) * | 2004-04-20 | 2005-10-26 | Tomoegawa Paper Co. Ltd. | Resin coated carrier for electrophotography and two-component developer for electrophotography made therefrom |
-
1982
- 1982-01-19 JP JP57006473A patent/JPS58123552A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6238696B2 (en) * | 1982-02-12 | 1987-08-19 | Tdk Electronics Co Ltd | |
| JPS58145625A (en) * | 1982-02-12 | 1983-08-30 | Tdk Corp | Magnetic carrier particle |
| 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 | |
| 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 | |
| JPS61500577A (en) * | 1983-12-05 | 1986-03-27 | ハネウエル・インコ−ポレ−テツド | Semiconductor pad area protection structure |
| JPS60135958A (en) * | 1983-12-23 | 1985-07-19 | Toda Kogyo Corp | Spherical magnetic carrier particles and their manufacture |
| JPH0431107B2 (en) * | 1983-12-23 | 1992-05-25 | ||
| JPH02267566A (en) * | 1989-04-10 | 1990-11-01 | Tomoegawa Paper Co Ltd | Developer for reversal development |
| EP0689100A1 (en) | 1994-06-22 | 1995-12-27 | Canon Kabushiki Kaisha | Carrier for electrophotography, two component type developer, and image forming method |
| US6316156B1 (en) | 1994-06-22 | 2001-11-13 | Canon Kabushiki Kaisha | Carrier for electrophotography, two component type developer, and image forming method |
| US5976747A (en) * | 1998-01-08 | 1999-11-02 | Powdertech Co., Ltd. | Ferrite carrier for electrophotographic developer and electrophotographic developer containing the same |
| 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 |
| EP1589381A2 (en) * | 2004-04-20 | 2005-10-26 | Tomoegawa Paper Co. Ltd. | Resin coated carrier for electrophotography and two-component developer for electrophotography made therefrom |
| EP1589381A3 (en) * | 2004-04-20 | 2006-09-06 | Tomoegawa Paper Co. Ltd. | Resin coated carrier for electrophotography and two-component developer for electrophotography made therefrom |
| US7682764B2 (en) | 2004-04-20 | 2010-03-23 | Tomoegawa Paper Co., Ltd | Resin coated carrier for electrophotography and two-component developer for electrophotography made therefrom |
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