JPS62164053A - Manufacture of electrophotographic developing carrier - Google Patents
Manufacture of electrophotographic developing carrierInfo
- Publication number
- JPS62164053A JPS62164053A JP61005414A JP541486A JPS62164053A JP S62164053 A JPS62164053 A JP S62164053A JP 61005414 A JP61005414 A JP 61005414A JP 541486 A JP541486 A JP 541486A JP S62164053 A JPS62164053 A JP S62164053A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- magnetic material
- weight
- carrier
- vapor
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Developing Agents For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、電子写真複写機、ファクシミリ、レーザビー
ムプリンタなどで使用される電子写真現像用キャリアの
製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of manufacturing a carrier for electrophotographic development used in electrophotographic copying machines, facsimile machines, laser beam printers, and the like.
従来の技術
従来、樹脂及び磁性体を含有する電子写真現像用キャリ
ア（以下単にキャリアと称す）は、材料を混合、混練し
た後その生成物乞粉砕することによって得ていた。2. Description of the Related Art Conventionally, carriers for electrophotographic development (hereinafter simply referred to as carriers) containing resins and magnetic materials have been obtained by mixing and kneading materials and then pulverizing the product.
□ 具体的には、
１）樹脂、磁性体、電荷制御剤等の材料をＶ型混合器等
の混合器を用いて乾式混合する。□ Specifically, 1) Materials such as resin, magnetic material, and charge control agent are dry mixed using a mixer such as a V-type mixer.
１１）混合された材料をバンバリーミキサ−等の混線器
を用いて混練する。11) Knead the mixed materials using a mixer such as a Banbury mixer.
１１１）混練された生成物を冷却して粗粉砕した後、ジ
ェットミル等の粉砕器で微粉砕する。111) The kneaded product is cooled and coarsely pulverized, and then finely pulverized using a pulverizer such as a jet mill.
ｉｖ）次に分級器を用いて必要に応じて希望する粒度分
布になるように分級する。iv) Next, use a classifier to classify the particles as necessary to obtain the desired particle size distribution.
工程を経てキャリアを得ていた。He had made a career through the process.
発明が解決しようとする問題点
しかしながら上記のようにして得られたキャリアは、微
細な磁性体の一部がキャリア表面に露出した状態で存在
するため、キャリアとトナーを混合した乾式二成分現像
剤（以下単に現像剤と称す）として使用する場合、攪拌
、混合によるキャリア同士あるいはキャリアとトナーの
衝突、摩擦等によりキャリア表面に露出している磁性体
の一部が剥離、欠落して現像剤中に混在してしまう。通
常この磁性体は黒色を呈しているため黒色トナーを使用
する場合、混在しても色そのものに問題はないが完成コ
ピーでは現像、転写されているため、画像表面がざらつ
く欠点を有していた。また、赤。Problems to be Solved by the Invention However, since the carrier obtained as described above exists with part of the fine magnetic material exposed on the surface of the carrier, a dry two-component developer in which the carrier and toner are mixed is When used as a developer (hereinafter simply referred to as a developer), part of the magnetic material exposed on the carrier surface may peel off or be lost due to collisions between carriers or carriers and toner due to stirring or mixing, or friction, etc. It will be mixed in. Normally, this magnetic material has a black color, so if black toner is used, there is no problem with the color itself even if it is mixed, but since the finished copy is developed and transferred, it has the disadvantage that the image surface becomes rough. . Also red.
青等のカラートナーを使用する場合は、欠落した磁性体
がトナー表面に付着したり、トナーと共に現像、転写さ
れるため、鮮明な色再現が困難になり、結果として濁っ
たカラー画像しか得られないと云ったような欠点を有し
ていた。When using color toner such as blue, missing magnetic substances may adhere to the toner surface or be developed and transferred together with the toner, making it difficult to reproduce clear colors and resulting in a cloudy color image. It had some drawbacks.
本発明は上記間聰点に鑑み、含有される磁性体の欠落を
防止して赤、青等のカラートナーを使用した場合でも鮮
明な色再現を可能とする電子写真現像用キャリアの製造
方法を提供するものである。In view of the above-mentioned density point, the present invention provides a method for producing a carrier for electrophotographic development, which prevents the magnetic material contained therein from being lost and enables clear color reproduction even when using color toners such as red and blue. This is what we provide.
問題点を解決するための手段
上記問題点を解決するために本発明の電子写真現像用キ
ャリアの製造方法は、
少なくとも樹脂と＠性体とよりなり、前記樹脂を２０〜
４０重量％、前記磁性体を６０〜８０重量多混練し、粉
砕した後、有機溶剤の蒸気中に浮遊させることにより、
前記樹脂を膨潤させて表面に存在する磁性体を固着する
ようにしたものであるＯ
作用
本発明は上記した製法によって、表面に存在する磁性体
が樹脂の膨潤によって包み込まれるため、磁性体は強固
に固着されることになり剥離や欠落が防止できることと
なる。Means for Solving the Problems In order to solve the above-mentioned problems, the method for producing a carrier for electrophotographic development of the present invention comprises at least a resin and an @-based material, and the resin is
40% by weight, 60 to 80% by weight of the magnetic material is kneaded, pulverized, and then suspended in the vapor of an organic solvent.
The resin is swollen and the magnetic material present on the surface is fixed to it. This prevents peeling and chipping.
実施例
以下本発明における電子写真現像用キャリアの製造方法
について説明する。EXAMPLES A method for producing a carrier for electrophotographic development according to the present invention will be described below.
本発明では、樹脂と磁性体とをミキサー等で混練した後
粉砕し、最終的に分級機で必要とする粒径に分級する。In the present invention, the resin and the magnetic material are kneaded using a mixer or the like, then pulverized, and finally classified into the required particle size using a classifier.
その後さらに有機溶剤の蒸気で処理することによってキ
ャリア表面に突出した状態で付着している磁性体を膨潤
した樹脂で包み込み、強固に固着させるようにしたもの
である。Thereafter, by further treating with organic solvent vapor, the magnetic material adhering to the carrier surface in a protruding state is wrapped in the swollen resin and firmly fixed.
以下いくつかの実施例を挙げて説明する。Several examples will be described below.
（実施例１）
スチレン−アクリル共重合樹脂２５重量部、フェライト
７６重量部、帯電性調整剤ニグロシン１重量部をヘンシ
ェルミキサーで混合し、バンバリーミキサ−で混練する
。その後粗粉砕し、ジェットミルで微粉砕する。さらに
風力分級機を用いて所望の平均粒径５０μに分級した。(Example 1) 25 parts by weight of styrene-acrylic copolymer resin, 76 parts by weight of ferrite, and 1 part by weight of chargeability modifier nigrosine are mixed in a Henschel mixer and kneaded in a Banbury mixer. After that, it is coarsely ground and then finely ground using a jet mill. Furthermore, the particles were classified to a desired average particle size of 50 μm using an air classifier.
こうして得られた生成物を容器内に入れ、下方より温風
を流入させながら回転羽根で攪拌しつつ浮遊させる。そ
して上方より、２−ブタノンを滴下し、この有機溶剤の
蒸気に触れさせて樹脂を膨潤させる。樹脂の膨潤が終了
すると滴下を止め、さらに温風で乾燥して表面に存在す
る磁性体を樹脂で包み込む状態に固着する。このような
工程処理を経てキャリアを得た。The product thus obtained is placed in a container and suspended while being stirred with a rotary blade while hot air is introduced from below. Then, 2-butanone is dropped from above, and the resin is swollen by contact with the vapor of this organic solvent. Once the resin has finished swelling, the dripping is stopped and the resin is further dried with warm air to ensure that the magnetic material on the surface is wrapped in resin. A carrier was obtained through such process treatment.
このキャリア９６重量部と赤色トナー５重量部を混合し
て松下製電子写真複写機１’−ＦＰ−１３００」に使用
したところ、濁りのない鮮明な赤色画［象が得られた。When 96 parts by weight of this carrier and 5 parts by weight of red toner were mixed and used in a Matsushita electrophotographic copying machine 1'-FP-1300, a clear red image without turbidity was obtained.
（実施例２）
ポリエステル樹脂１０重量部、アミン樹脂１０重量部、
フェライト８０重量部を混合し、実施例（実施例３）
スチレン樹脂２５重量部、ブチルアクリレート樹脂１５
重量部、フェライト６０重量部、ニグロシン１重量部を
ヘンシェルミキサーで混合し、バンバリーミキサ−で混
練する。その後粗粉砕し、ジェットミルで微粉砕する。(Example 2) 10 parts by weight of polyester resin, 10 parts by weight of amine resin,
Mixing 80 parts by weight of ferrite, Example (Example 3) 25 parts by weight of styrene resin, 15 parts by weight of butyl acrylate resin.
parts by weight, 60 parts by weight of ferrite, and 1 part by weight of nigrosine are mixed in a Henschel mixer, and kneaded in a Banbury mixer. After that, it is coarsely ground and then finely ground using a jet mill.
さらに風力分級機を用いて所望の平均粒径６０μに分級
した。こうして得られた生成物を容器内に入れ、下方よ
り温風を流入させながら回転羽根で攪拌しつつ浮遊させ
る。そして上方よりトルエンを滴下し、この有機溶剤の
蒸気に触れさせて樹脂を膨潤させる。樹脂の膨潤が終了
すると滴下を止め、さらに孟風で乾燥して表面に存在す
る磁性体を樹脂で包み込む状態に固着する。このような
工程処理を経てキャリアを得た。Furthermore, the particles were classified to a desired average particle size of 60 μm using an air classifier. The product thus obtained is placed in a container and suspended while being stirred with a rotary blade while hot air is introduced from below. Then, toluene is dropped from above, and the resin is swollen by contact with the vapor of this organic solvent. Once the resin has finished swelling, the dripping is stopped, and the resin is further dried using a Meng wind so that the resin wraps the magnetic material present on the surface. A carrier was obtained through such process treatment.
このキャリア９５重量部と赤色トナー５重量部を混合し
て松下製電子写真複写機「ＦＰ−１３００」に使用した
ところ、濁りのない解明な赤色画像が得られた。When 95 parts by weight of this carrier and 5 parts by weight of red toner were mixed and used in an electrophotographic copying machine "FP-1300" manufactured by Matsushita, a clear red image without turbidity was obtained.
発明の効果
以上詳述したごとく本発明によれば、表面に存在する磁
性体を樹脂を膨潤させて包み込むような状態で固着する
ようにしたため、使用中に磁性体が剥離、欠落したりす
ることがなく、カラートナーを使用した場合でも濁りの
ない鮮明なカラー画像が得られる。また磁性体の現像、
転写が防止できるので完成コピーの画像表面は良好とな
ると云ったような効果が得られる。Effects of the Invention As detailed above, according to the present invention, since the magnetic material present on the surface is fixed in a state where the resin swells and wraps it, there is no possibility that the magnetic material will peel off or fall off during use. Even when using color toner, clear color images with no turbidity can be obtained. Also, development of magnetic materials,
Since transfer can be prevented, the image surface of the completed copy will be improved.
Claims (1)
４０重量％、前記磁性体を６０〜８０重量％混練し、粉
砕した後、有機溶剤の蒸気中に浮遊させることにより、
前記樹脂を膨潤させて表面に存在する磁性体を固着する
ようにしたことを特徴とする電子写真現像用キャリアの
製造方法。It is made of at least a resin and a magnetic material, and the resin is
By kneading 40% by weight and 60 to 80% by weight of the magnetic material, pulverizing the mixture, and suspending the mixture in the vapor of an organic solvent,
A method for producing a carrier for electrophotographic development, characterized in that the resin is swollen to fix the magnetic material present on the surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61005414A JPS62164053A (en) | 1986-01-14 | 1986-01-14 | Manufacture of electrophotographic developing carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61005414A JPS62164053A (en) | 1986-01-14 | 1986-01-14 | Manufacture of electrophotographic developing carrier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62164053A true JPS62164053A (en) | 1987-07-20 |
Family
ID=11610483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61005414A Pending JPS62164053A (en) | 1986-01-14 | 1986-01-14 | Manufacture of electrophotographic developing carrier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62164053A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5223369A (en) * | 1992-03-16 | 1993-06-29 | Xerox Corporation | Process for coating carrier particles |
-
1986
- 1986-01-14 JP JP61005414A patent/JPS62164053A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5223369A (en) * | 1992-03-16 | 1993-06-29 | Xerox Corporation | Process for coating carrier particles |
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