JPS59111160A - Electrophotographic ferrite carrier - Google Patents
Electrophotographic ferrite carrierInfo
- Publication number
- JPS59111160A JPS59111160A JP57219590A JP21959082A JPS59111160A JP S59111160 A JPS59111160 A JP S59111160A JP 57219590 A JP57219590 A JP 57219590A JP 21959082 A JP21959082 A JP 21959082A JP S59111160 A JPS59111160 A JP S59111160A
- Authority
- JP
- Japan
- Prior art keywords
- ferrite
- carrier
- ferrite carrier
- electrophotography
- particles
- 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
- G03G9/108—Ferrite carrier, e.g. magnetite
- G03G9/1085—Ferrite carrier, e.g. magnetite with non-ferrous metal oxide, e.g. MgO-Fe2O3
-
- 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
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Developing Agents For Electrophotography (AREA)
- Compounds Of Iron (AREA)
- Magnetic Ceramics (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は電気抵抗を改良した電子写真用ｔ・ナーキ（・
リアに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides an electrophotographic T-Narch (-
It concerns the rear.
電子写真の現像法どしては、カスケード現像法。The development method for electrophotography is the cascade development method.
磁気ブラシ現俄法やぞの伯の方法があるが、キャリアど
して要求される特性は適当な摩擦帯電性をもらトナー粒
子を吸引すること、緻密であり粒子の強度が−Ｖ分で精
の破壊を生じさせない、粒子が流動す）１に富むこと、
粒子が均一であること、表面の状ｆｆ＜が？！ｉｉ１度
等ににって種々の特性が変らず安定しててること、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。特に電気抵抗は摩
擦帯電と密接に関係し、画像特↑１に大きく影響を及ぼ
すことが知られている。There are current magnetic brush methods and Zonohaku's method, but the characteristics required for the carrier are to have appropriate triboelectric charging properties, to attract toner particles, and to be dense and have a particle strength of -V min. particles flow without causing destruction of particles).
Are the particles uniform and the surface condition ff<? ! (ii) It must be stable in various properties without changing at 1 degree, it must have tensile and compressive strength, and it must have appropriate saturation magnetization, magnetic permeability, or coercive force. In particular, electrical resistance is closely related to triboelectrification, and is known to greatly affect image characteristics ↑1.
従来１−ナール（・リア粒子どじて秤々の４オ斜が１φ
用されてさているが、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″−ｊ５な処理をしＣ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１ヒし、１〜ナーが付着してしま一〕た
りあるいは使用環境の潤度（こ敏感になって画商の鮮明
度がうすれたりし寿命は短いという欠点がある。Conventionally, 1-nar (・The rear particle is 4 degrees of scale is 1φ
Iron powder is the most commonly used material. The surface of the iron powder is properly treated and used, but if used for a long time, the surface of the particles will change physically or chemically, and the particles will become attached. It has the disadvantage that it becomes sensitive to the humidity of the environment in which it is used, and the sharpness of the art dealer's image fades, resulting in a short lifespan.
また、キｔ・リアとして酸化物１４１ ｆ’１−１Ａ料
である）１ライ［・を用いることは特開昭５２−５６５
３６等で報告されているが、従来のフエライ１−キャリ
アは画像特性あるいｌよ寿命の魚で必ずしし満足しうる
ちのではない。In addition, the use of oxide 141f'1-1A material) 1 rye as a kit rear is disclosed in Japanese Patent Application Laid-Open No. 52-565.
However, conventional flyfish 1-carriers are not always satisfactory in terms of image characteristics or lifespan.
本ブを明は電気抵抗を任意に変えることにより「ｉ字部
度を増し、これら従来の電子写真用トナーキトリアの欠
点をなくし画像特性の優れた、また寿命の良いキトリア
を提供するものである。The purpose of this invention is to increase the I-shaped portion by arbitrarily changing the electric resistance, eliminate these drawbacks of conventional electrophotographic toner kitria, and provide kitria with excellent image characteristics and a long life.
本発明において、電気抵抗率は１０２Ωｃａｎ以上が良
く、本範囲外では摩擦帯宙吊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１的は１０ ｅ
ｌｌｌｌｌ／’ｇ以上が適切で、この値より小さい場合
には磁気ロールとの吸る力は落ち目標どする鮮明な画像
を１ｑることは困同である。In the present invention, it is preferable that the electrical resistivity is 102Ωcan or more, and if it is outside this range, the friction band suspension cannot be controlled to an appropriate value.
Furthermore, it is difficult to obtain the desired clear image because it is easily influenced by humidity and the like. Also, the saturation magnetization is 10 e
A value of lllll/'g or more is appropriate; if it is smaller than this value, the suction force with the magnetic roll decreases and it is difficult to obtain a clear image of 1q.
また）−ＩＣが１０００ｅ以上では粒子でのものが磁石
のｔ′１質を持ち、種々の部品に付着し良い画像は得ら
れない。また透磁串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 -IC is 1000e or more, the particles have the t'1 quality of a magnet and adhere to various parts, making it impossible to obtain good images. Furthermore, if the magnetic permeability skewer μ is less than 10, the response to the magnetic roll will be poor and the image quality will be affected.
］ツ下実施例によって詳細に説明する。] This will be explained in detail using an example below.
実施例
モル比でＢａＯ２０％、ＺｎＱ２０％、Ｆｅ２０３００
ｅ６どなるように秤早し混合した。Example molar ratio: BaO20%, ZnQ20%, Fe20300
e6 Mix by weighing quickly.
ｆｆ’？ Ａ Ｉ’Ａ１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℃
で仮焼をした。仮焼した試第１１は、ボールミル、振動
ミル。ff'? As A I'A1, a ball mill, a vibration mill, a mixer, etc. were used. Mixed powder is 800-1200℃
I did a calcination. Trial No. 11, which was calcined, was a ball mill and a vibration mill.
ア［・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．
３〜２．０μであった。It was crushed using a crusher such as a lighter. The particle size after pulverization was measured using an air permeation method, and the average particle size was 0.
It was 3-2.0μ.
粉砕した試１゛）１はバイングーどしてｐ、ｖ、△（ホ
’Ｊ Ｌｊ二／Ｌｚｊ’ル１−ル）（ｆ）ｔＪ＜ｊ８’
＋ｉｌ （Ｐ、 Ｖ、 Ａの品どじでは０．０５・−ｓ
、ｏｗｔ％）を使用し、スプレードライヤー、ニーター
、ミキサー弯゛の迄Ｒ’を器を用い造粒した。Pulverized sample 1゛) 1 is a bangu and p, v, △ (Ho'J Lj2/Lzj'R1-R) (f) tJ<j8'
+il (0.05・-s for P, V, and A products)
, owt%), and was granulated using a spray dryer, a kneader, and a mixer up to R'.
次ニｉｉ：ｌ’ｉ’ｆ才５）ヲ１１００−１４００°Ｃ
Ｔ ｌ：＋’ａ成した。焼成方法としてはアルミプ等の
容器に造粒粉を入れて焼成しても良いｌ）（、多量に容
器（こ入れて焼成する場合には焼成の際に粒成長し、粒
同士が接合する場合があるためローターキルン等で試わ
ｌを回転しながら焼成しても良い。Next ii: l'i'f 5) 1100-1400°C
T l:+'a was achieved. As for the firing method, you can put the granulated powder in a container such as Aluminum and fire it. Because of this, it may be possible to fire the product while rotating it in a rotor kiln or the like.
次に ７００°ＣＣ２時間窒素中雰囲気で熱処理を行に
、た。このようにして得られたフエライ［−の特性を
第１表に示す。Next, heat treatment was performed at 700°C for 2 hours in a nitrogen atmosphere. Table 1 shows the properties of the thus obtained Ferrai [-].
第１表
この球状）Ｔライ１−をｌ〜ルナ−キャリアして使用し
、コピーした結果、従来の鉄粉キ１７リアは約１０．０
００枚、フエライ１へキャリア５０，０００枚に対し本
発明キャリアを用いることにより７０，０００−１００
，０００枚の鮮明なコピーが可能であった。Table 1 As a result of using this spherical) T Lie 1- as a l ~ Luna carrier and copying it, the conventional iron powder Ki 17 rear is approximately 10.0
00 sheets, 70,000-100 sheets by using the carrier of the present invention for 50,000 sheets on the carrier 1
,000 clear copies were possible.
実施例
１ル比で３ａＱ７％、ＺｎＯ２３％、ＭｎＯ３％１Ｃｕ
０２％、Ｆ（４２０３６５％となルヨうニ秤ｍ Ｌ実１
’＋ｆｌｊ １９１１と同様な処理により、（Ｊぼ同特
性をもつ球状のフエライ［・をｆヤ成した。この球状フ
ェライトを）Ｔラーイトキャリアとして］ビー試験した
結果、実施例１ど同様のコピー性能を得た。Example 1 3aQ7%, ZnO23%, MnO3%1Cu
02%, F (420365%)
'+flj By the same process as 1911, (a spherical ferrite with J-identical characteristics was formed. This spherical ferrite was used as a T-light carrier). As a result of the bee test, it was found that a copy similar to Example 1 was obtained. Obtained performance.
以」−の如く、本発明フエライ］・キャリアは従来１φ
用されでいる鉄粉キトリアに比べ、高抵抗でかつｆ（方
面であることが判明し、電子写真用の現像材料どし°Ｃ
卓越した効果を示しその工業的応用価１１ｔ１は大であ
る。As shown in "-, the carrier of the present invention is conventionally 1φ
It was found that it has a higher resistance than the iron powder chitria that is currently used, and it is found to be a developing material for electrophotography.
It shows excellent effects and its industrial application value 11t1 is large.
Claims (1)
ｎ Ｑ ５％−３０％、 Ｆｅ ２０３５０％〜９０％
又は該組成の一部を１価以上の金属の１種または２種以
上で置換してなるフェライトを熱処理することにより、
電気抵抗を１０２・〜１０ Ω−ｃｍに改良したこと
を特ｉｔｋとする球状の電子写真用フエライ［・キトリ
ア。 ２、特許請求の範囲第１項記載のものにａ５いて、飽和
Ｉｎ化が１０８ｍＬｌ／′（Ｊ以−にであることを特徴
とする電子写真用フエライトキｔ・リア。 ３、特８′［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電子写真用）１
ライ［・キャリア。 ４、特許請求の範囲第１項記載のものにおいて、キュリ
ー）品麻ＴＣが１００℃以上であることを特徴どする電
子写真用フエライトキＡ７リア。 ５．１４許請求の範囲第１項記載のものにおいて、粒子
の強度が１０００ ｇ、’ｃｎ＋２以上であることを特
徴とする電子写真用フェライ１−キャリア。 Ｇ、特許請求の範囲第１項から第５項記載のものに、δ
いて、粒子の表面を酸化させたことを特徴とする電子写
真用フェライｉ・キャリア。 ７、特許請求の範囲第１項から第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ｆ５２とす
る電子写真用フエライ１−キャリア。[Claims] 1. [Magnetization: BaO590・” 3096 + Z
n Q 5%-30%, Fe 20350%-90%
Or by heat-treating a ferrite obtained by replacing a part of the composition with one or more monovalent or higher metals,
A spherical ferrite for electrophotography, which has an improved electrical resistance of 102 to 10 Ω-cm. 2. A ferrite kit for electrophotography according to claim 1, characterized in that the saturated In conversion is 108 mL/' (J or more). 3. Patent 8' [Claim (for electrophotography) 1, which is characterized by a magnetic permeability of μm0 or more in the range described in item 1)
Rai [・Career. 4. A ferrite key A7 rear for electrophotography according to claim 1, characterized in that the Curie linen TC is 100°C or higher. 5.14 A ferrite carrier for electrophotography according to claim 1, characterized in that the strength of the particles is 1000 g, 'cn+2 or more. G, in claims 1 to 5, δ
A Ferrai i carrier for electrophotography is characterized in that the surface of the particles is oxidized. 7. A Ferray 1-carrier for electrophotography 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 |
|---|---|---|---|
| JP57219590A JPS59111160A (en) | 1982-12-15 | 1982-12-15 | Electrophotographic ferrite carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57219590A JPS59111160A (en) | 1982-12-15 | 1982-12-15 | Electrophotographic ferrite carrier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59111160A true JPS59111160A (en) | 1984-06-27 |
Family
ID=16737914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57219590A Pending JPS59111160A (en) | 1982-12-15 | 1982-12-15 | Electrophotographic ferrite carrier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59111160A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63216060A (en) * | 1987-03-05 | 1988-09-08 | Hitachi Metals Ltd | Carrier particles for developing electrostatic charge image |
| US4925762A (en) * | 1987-08-17 | 1990-05-15 | Basf Aktiengesellschaft | Carrier for reprography and production of this carrier |
| JPH02228674A (en) * | 1989-03-01 | 1990-09-11 | Tomoegawa Paper Co Ltd | Developer for reversal development |
-
1982
- 1982-12-15 JP JP57219590A patent/JPS59111160A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63216060A (en) * | 1987-03-05 | 1988-09-08 | Hitachi Metals Ltd | Carrier particles for developing electrostatic charge image |
| US4925762A (en) * | 1987-08-17 | 1990-05-15 | Basf Aktiengesellschaft | Carrier for reprography and production of this carrier |
| JPH02228674A (en) * | 1989-03-01 | 1990-09-11 | Tomoegawa Paper Co Ltd | Developer for reversal development |
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