JPS59111161A - Electrophotographic ferrite carrier - Google Patents
Electrophotographic ferrite carrierInfo
- Publication number
- JPS59111161A JPS59111161A JP57219591A JP21959182A JPS59111161A JP S59111161 A JPS59111161 A JP S59111161A JP 57219591 A JP57219591 A JP 57219591A JP 21959182 A JP21959182 A JP 21959182A JP S59111161 A JPS59111161 A JP S59111161A
- Authority
- JP
- Japan
- Prior art keywords
- ferrite
- ferrite carrier
- carrier
- particles
- electrophotography
- 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トナーキトリア
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrophotographic toner chytria having improved electrical resistance.
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.
磁気ブラシ現像法Ｍの他の方法があるが、キ１７リアど
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
子を吸引すること、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、粒子が流動性に富むこと、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１イξ特性に大きく影響を及ぼすことが知られて
いる。There are other methods of magnetic brush development, but the characteristics required for the K17 rear are that they have appropriate triboelectric charging properties, that they attract toner particles, that they are dense, that the particles have sufficient strength, and that they do not break. The particles must be highly fluid, the particles must be uniform, the surface condition must be stable so that various properties do not change due to humidity, etc., the particles must have tensile and compressive strength, and the particles must have appropriate saturation. It has magnetization, magnetic permeability, or coercive force. In particular, it is known that electrical resistance is closely related to triboelectric charging and greatly influences the image quality.
従来１−ナーキトリア粒子としで神々の材料が使用され
−Ｃさくいるが、最も多く用いられたものとして１り、
′１′り）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１史用づると粒子の表面が物理的あ
るいは化学的に変化し、ｌ−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雨間の鮮明度が
うすれたりし寿命は短いという欠点がある。Conventionally, the divine material was used as 1-Narchitria particles, but the most commonly used one was 1.
'1'). The surface of iron powder is used after being appropriately treated, but after being used for a long time, the surface of the particles may change physically or chemically, causing l-ner to adhere to it, or due to the environment in which it is used. The drawback is that it is sensitive to humidity, the clarity of rainwater fades, and its lifespan is short.
また、キャリアとして酸化物磁性イオオ゛１−で・′あ
るフエライ１−を用いることは特開昭５２ ’、＋
６５３ Ｇ等で報告されているが、従来のフ１ライ１−
キ１１リアは画像特性あるいは寿命の点て必ずしも満足
しうるち−のではない。Furthermore, the use of ferrite 1- with oxide magnetic ion 1-' as a carrier was disclosed in Japanese Patent Application Laid-open No. 52/1989, +
653G, etc., but the conventional fly 1 fly 1-
Key 11 rears are not always satisfactory in terms of image characteristics or lifespan.
本発明は電気抵抗を注意に変えることにより印字潤度を
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、また寿命の長いキＡｌリアを
提供するものである。The present invention aims to increase print moisture by carefully changing electrical resistance, eliminate these drawbacks of conventional electrophotographic toners, and provide a toner with excellent image characteristics and a long life.
本発明において、電気抵抗率は１０２Ωａｍ以上が良く
、本トロ囲外では摩擦帯宙吊を適当な藺に制御できず、
また湿度等の影響を受（プゆすく目的とする鮮明な画像
を１１することは困ｔ＃である。また飽和磁化の値は１
００ｍ１ｌ／’（］以十が適切で、この値より小さい場
Ｑ （こは磁気ロールどの吸着力は落ち目標どする鮮明
な画像を得ることは困難である。In the present invention, the electrical resistivity is preferably 102 Ωam or more, and the suspension of the friction zone cannot be properly controlled outside the main tube.
In addition, it is affected by humidity, etc. (it is difficult to obtain a clear image for the purpose of printing). Also, the value of saturation magnetization is 1
00ml/'() or more is appropriate, and if Q is smaller than this value, the magnetic roll's attraction force will drop and it will be difficult to obtain a clear image.
またｌ−Ｉ Ｃが１０００ｅ以」−では粒子イのものが
磁石の性質を持ち、種々の部品に１１着し良い画像は得
られない。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。In addition, when the l-IC is 1000e or more, the particles have magnetic properties and adhere to various parts, making it impossible to obtain good images. 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
ｔ／Ｌ、比ｒＰｂ０２０％、Ｚｎ０２０％、Ｆｅ２０３
６０％となるように秤吊し混合した。Example 1 t/L, ratio rPb020%, Zn020%, Fe203
They were mixed by hanging on a scale so that the concentration was 60%.
混合１幾どしては、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。For mixing 1, a ball mill, a vibration mill, a mixer, etc. were used. The mixed powder was calcined at 800 to 1200°C.
１縦焼した試料は、ホールミル、振動ミル。1. Vertical firing samples were prepared using a whole mill or 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Ｃ０
，３〜２．０μであった。It was pulverized using a pulverizer such as A[-Rai-Tar. The particle size after pulverization was measured using an air permeation method, and the average particle size C0
, 3 to 2.0μ.
粉砕した試料はバインダーとしてＰ、＼１．Δ（ポリビ
ニルアルコール）の水溶液（Ｐ、Ｖ、Ａの■として（ま
０，０５−５．０Ｗｉ％）を１吏用し、スプレー１〜ラ
イ■−、ニーグー、ミキサー等の漬粒器を用い造オニＩ
７シた。The pulverized sample contained P as a binder, \1. Use 1 liter of an aqueous solution of Δ (polyvinyl alcohol) (as ■ for P, V, and A (0.05-5.0 Wi%), spray 1 to rye ■-, use a pickling machine such as a Ni-goo or a mixer. Zo-Oni I
7 shita.
次に造粒粉を１１００−１４００℃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、粒同士が接合する場合があるためロータ
ーキルン等で試′Ａ′、ｉ１を回転しながら焼成しても
良い。Next, the granulated powder was fired at 1100-1400°C. 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. Samples 'A' and i1 may be fired while rotating in a rotor kiln or the like.
次に ７００℃で２時間窓素中雰囲気で熱速理を行なっ
た。このようにして得られたフ］ライ［・の特性を第１
表に示ず。Next, thermal annealing was performed at 700°C for 2 hours in a window element atmosphere. The characteristics of the fly obtained in this way are
Not shown in the table.
第１表
この球状フエライ１〜を１〜ナーキヤリアとして使用し
、コピーした結果、従来の鉄粉キャリアは約１０．００
０枚、フエライｉ−キャリアｓｏ、ｏｏｏ枚に対し本発
明キトリアを用いることにより７０．０００−ｉｏｏ、
。Table 1 As a result of copying and using this spherical powder carrier as a carrier, the conventional iron powder carrier is approximately 10.00
70.000-ioo, by using the Kitria of the present invention for 0 pieces, Ferrai i-Carrier so, ooo pieces,
.
００枚の鮮明なコピーが可能であった。00 clear copies were possible.
実施例２ モル比でＰｂ０７％、７ｎＱ２３％、ＣＬ１０３％。Example 2 Pb07%, 7nQ23%, CL103% in molar ratio.
ＭｎＯ３％、Ｆｅ２ｏ、６５％となるように秤量し、実
施例１ど同様な処理により、はぼ同特性をもつ球状のフ
エライ］・を作成した。この球状フエライ１〜をフエラ
イトキ１／リアとしてコピー試験した結果、実施例１ど
同様のコピー性能を得た。It was weighed to have 3% MnO and 65% Fe2O, and was treated in the same manner as in Example 1 to produce a spherical ferrite with substantially identical properties. As a result of a copying test using the spherical ferrite 1 to ferrite key 1/rear, copying performance similar to that of Example 1 was obtained.
Claims (1)
０％、 Ｆｅ ２０３５０％〜９０９６又は該組成の一
部を１１ｄＴｉ ＬＪ、土の金属の１種または２杯以上
で置換してなるフエライ［・を熱処理することにより、
電気抵抗を１０２・〜１０１３Ω−ｃｍに改良したこと
を特徴とする球状の電子写真用フェライト・キ１７リア
。 ２、特許請求の範囲第１項記載のものにおいて、飽和磁
１ヒが１０ ｅｍＵ／’！］以−Ｌであることを特徴と
する電子写真用フエライ１〜１： ｔ−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電子写真用フェライ
［・キャリア。 ４、特許請求の範囲第１項記載のものにおいて、キコリ
ー温ｒＣｉＴ Ｃが１００℃以上であることを特徴どす
る電子写真用フエライＩ−キトリア。 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１０００ ｇ／ｃｍ２以上であることを特徴とす
る電子写真用フエライ１〜キ１／リア。 Ｇ、特許請求の範囲第１項から第５項記載のものにおい
て、粒子の表面を酸化させたことを特徴とする電子写真
用フエライ［・キャリア。 ７、’ＪＦｊ訂請求の範囲第１項から第５項記載のもの
にＪ３いて、粒子の表面を樹脂等Ｃ被覆したことを特徴
とする電子写真用フェライトキャリア。[Claims] 1. Pb05%・~30%, 7n05%・~30% in molar ratio
0%, Fe 20350% ~ 9096 or a part of the composition is replaced with 11dTi LJ, one or more of the earth metals by heat treatment of
A spherical ferrite for electrophotography, which has an improved electrical resistance of 102.about.1013 Ω-cm. 2. In the product described in claim 1, the saturation magnetic flux is 10 emU/'! ] Ferrays for electrophotography 1 to 1 characterized by being -L: t-rea. 3. A ferrite carrier for electrophotography according to claim 1, characterized in that the magnetic permeability is μm0 or more. 4. Ferrai I-chytria for electrophotography according to claim 1, characterized in that the Chichory temperature rCiTC is 100°C or higher. 5. Ferray 1 to Ki 1/Ria for electrophotography according to claim 1, characterized in that the strength of the particles is 1000 g/cm2 or more. G. A carrier for electrophotography according to claims 1 to 5, characterized in that the surface of the particles is oxidized. 7. A ferrite carrier for electrophotography according to J3 according to claims 1 to 5, characterized in that the surfaces of the particles are coated with resin or the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57219591A JPS59111161A (en) | 1982-12-15 | 1982-12-15 | Electrophotographic ferrite carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57219591A JPS59111161A (en) | 1982-12-15 | 1982-12-15 | Electrophotographic ferrite carrier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59111161A true JPS59111161A (en) | 1984-06-27 |
Family
ID=16737931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57219591A Pending JPS59111161A (en) | 1982-12-15 | 1982-12-15 | Electrophotographic ferrite carrier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59111161A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4925762A (en) * | 1987-08-17 | 1990-05-15 | Basf Aktiengesellschaft | Carrier for reprography and production of this carrier |
-
1982
- 1982-12-15 JP JP57219591A patent/JPS59111161A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4925762A (en) * | 1987-08-17 | 1990-05-15 | Basf Aktiengesellschaft | Carrier for reprography and production of this carrier |
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