JPH04177256A - Magnetic color toner - Google Patents

Magnetic color toner

Info

Publication number
JPH04177256A
JPH04177256A JP2305111A JP30511190A JPH04177256A JP H04177256 A JPH04177256 A JP H04177256A JP 2305111 A JP2305111 A JP 2305111A JP 30511190 A JP30511190 A JP 30511190A JP H04177256 A JPH04177256 A JP H04177256A
Authority
JP
Japan
Prior art keywords
toner
image
color
magnetic
color toner
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
Application number
JP2305111A
Other languages
Japanese (ja)
Inventor
Akinori Toyoda
昭則 豊田
Yasuhito Yuasa
安仁 湯浅
Fumio Nakayama
文雄 中山
Noriaki Hirota
廣田 典昭
Miyuki Tsuji
辻 みゆき
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP2305111A priority Critical patent/JPH04177256A/en
Publication of JPH04177256A publication Critical patent/JPH04177256A/en
Pending legal-status Critical Current

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  • Developing Agents For Electrophotography (AREA)

Abstract

PURPOSE:To enable a sharp color image having high image density and free from toner deposition on a non-image section to be obtained by causing color toner to contain an organic magnetic substance. CONSTITUTION:An organic magnetic substance is contained in color toner. The toner can, therefore, be restrained with magnetism and a thick toner layer can be formed on a sleeve. According to this construction, much toner is deposited on an electrostatic latent image, and an image of high density can be obtained. Also, the toner can be prevented from being deposited on a non- image section, due to magnetism restraint. In addition, the color reproducibility of the color toner can be improved, due to the use of the organic magnetic substance.

Description

【発明の詳細な説明】 産業上の利用分野 本発明(よ 電子写真法 静電印刷法において静電潜像
を現像するためのトナーについてのものであり、特にカ
ラー磁性トナーに関するものである。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a toner for developing an electrostatic latent image in an electrostatic printing method, and particularly to a color magnetic toner.

従来の技術 電子写真法 静電印刷法 静電記録法等において形成さ
れる静電潜像(よ 一般にトナーによって現像され そ
の後に紙への転鳳 定着工程を経て画像が可視化されも
 静電潜像を現像する方法はトナー粒子を帯電した後に
静電引力によって静電潜像を有する感光体に付着させ、
可視化する工程であa トナーを現像する方法としては
一般にキャリアと呼ばれるものと混合した二成分現像方
法と、 トナー単独で用いる一成分現像方法とがあも前
者の方法は トナー及びキャリアを混合撹拌して相互の
摩擦帯電によりトナーを帯電させるものであってガラス
ピーズキャリアを用いるカスケード現像方法 鉄粉キャ
リアを用いる磁気ブラシ現像方法などがよく知られてい
も これらいずれの方法においてk 現像剤中のトナー
は現像工程で逐次消費されるため現像中はトナーの補給
を行い現像剤中のトナーとキャリアの比を常に一定範囲
に維持する必要があム また使用するキャリアによって
(よ 例えば鉄粉キャリアを用いた場合には表面が酸化
されることによって劣化してトナーとの摩擦帯電挙動が
変化すも つまりトナー中に磁性体が含有されている場
合これら磁性体と酸化されたキャリアの摩擦帯電系列と
酸化を受けないキャリアとの摩擦帯電系列にはずれが生
じるためキャリアの帯電極性は所望の極性に対し逆の極
性を示す場合があム このため画像に好ましくないキャ
リア付着や非画像部へのトナーの付着いわゆるカブリを
生じるものかあも 上記の二成分現像にまつわる欠点を回避するた数 トナ
ー単独で用いる後者の方法も各種提案されていも 例え
ばキャリア粒子の代わりビーバーやうさぎやももんかの
毛を円筒状にしたブラシを用いるファーブラシ現像法 
トナー粒子を松露状態にして用いるパウダークラウド現
像法 周期的な電界変化を用いた非接触現像法等がある
力文 中で舷 磁性体を含有する磁性トナーを用いる方
法は一成分磁気ブラシ現像法等優れたものかあもしかし
上記のような現像方法中の磁性トナーに含有させる磁性
体として、従来マグネタイトあるいはフェライト等を用
いており、これらの磁性体は黒または暗褐色を有してい
るた敷 鮮明なカラー画像を得るためにζよ 大きな弊
害となってい九そのためカラートナー現像方法として(
よ 非磁性−成分現像法が用いられてき九 これは磁性体を含まない非磁性カラートナーを用いて、
弾性ブレードでの鏡像力でトナー層形成し 電界によっ
て現像を行うものであも発明が解決しようとする課題 しかしながら上記のような非磁性カラートナーを用いる
方法では スリーブ上にトナーを保持する拘束力はトナ
ーの帯電と分子間力に たよるため弱(l そのたべ 
トナー層を薄層にしなければならず画像濃度を高くする
ことができなL−またトナー飛散が生じ非画像部へのト
ナー付着を生じるという課題を有してきに 本発明は上記課題に鑑へ 鮮明なカラー画像を得るため
の磁性カラートナーを提供するものであも 課題を解決するための手段 上記課題を解決するために本発明の磁性カラートナーζ
よ 有機磁性体を含有するものであ4作用 本発明は上記した構成によって磁力でトナーを拘束しス
リーブ上に厚いトナー層を形成することができも その
ことによって静電潜像にトナーが多く付着し濃度の高い
画像が得られる。また非画像部へのトチ−付着も磁気拘
束力によって防止することができも しかも有機磁性体
を用いるためにカラートナーの色再現性が良くなも 実施例 以下本発明の一実施例の磁性カラートナーについて説明
すも 本発明はこれらの実施例に限定されるものではな
(t な耘 部は重量部を表すものとすも 実施例1 電荷を与える側としてデカメチルフェロセン、また電荷
を受けとる側にテトラシアノエチレンを使用し それら
を混合し結晶化をして有機磁性体を作成した 次にこれ
らの材料をもとにトナーを作成した スチレンアクリル樹脂     100部有機磁性体 
          50部ポリプロピレンワックス 
     5都合金属錯体(荷電制御剤)     3
部カーミン6B(マゼンダ顔料)    3部上記組成
からなる混合物をロールミルで130℃で溶融混練し 
冷却後にカッターミルで粗粉砕しその後ジェットミルで
微粉砕し風力分級にて4〜25μの分級品を得て、さら
にヘンシルミキサーでシリカ0.5重量%外添してマゼ
ンダ色磁性トナーを得た このトナーを用いて、デジタル複写機FP−C1(松下
電器製)によって複写テストを行ったとこへ 鮮明なマ
ゼンダ色の画像が得られ?Q、10000枚連続複写を
行ったところ画像濃度1.3〜1.4の安定した高濃度
画像が続い九 また非画像部へのトナー付着も見られな
l、L  きわめて鮮明なマゼンダ色の画像が得られた
 さらにOHPシートを通したところ極めて色の透過度
のよいOHP画像が得られた 実施例2 実施例1と同様な方法で有機磁性体を作成しに次にその
磁性体でトナーを作成した スチレンアクリル樹脂     100部有機磁性体 
          50部ポリプロピレンワックス 
     5都合金属錯体(荷電制御剤)      
3部ジスアゾイエロー(イエロー顔料)  3部上記組
成からなる混合物をロールミルで130℃で溶融混練し
 冷却後にカッターミルで粗粉砕しその後ジェットミル
で微粉砕し風力分級にて4〜25μの分級品を得て、さ
らにヘンシルミキサーでシリカ0.5重量%外添してイ
エロー色磁性トナーを得九 このトナーを用いて、市販の複写機L−300(松下電
器製)によって複写テストを行ったとこへ 鮮明なイエ
ロー色の画像が得られ總 10000枚連続複写を行っ
たところ画像濃度1.25〜1.35の安定した高濃度
画像が続いな また非画像部へのトナー付着も見られな
いきわめて鮮明なイエロー色の画像が得られた さらに
OHPシートを通したところ極めで色の透過度のよいO
HP画像が得られ九 実施例3 実施例1と同様な方法で有機磁性体を作成した次にその
磁性体でトナーを作成し九 スチレンアクリル樹脂     100部有機磁性体 
          50部ポリプロピレンワックス 
     5都合金属錯体(荷電制御剤)      
3部銅フタロシアニン(シアン顔料)   3部上記組
成からなる混合物をロールミルで130℃で溶融混練し
 冷却後にカッターミルで粗粉砕しその後ジェットミル
で微粉砕し風力分級にて4〜25μの分級品を得て、さ
らにヘンシルミキサーでシリカ0.5重量%外添してシ
アン色磁性トナーを得通 このトナーを用いて、市販の複写機L−300(松下電
器製)によって複写テストを行ったとこへ 鮮明なシア
ン色の画像が得られ九 10000枚連続複写を行った
ところ画像濃度1.35〜1、45の安定した高濃度画
像が続い九 また非画像部へのトナー付着も見られない
きわめて鮮明なシアン色の画像が得られた さらにOH
Pシートを通したところ極めて色の透過度のよいOHP
画像が得られ九 発明の効果 以上のよう本発明はカラートナー中に有機磁性粉を含有
することによって画像濃度が十分に高く、非画像部への
トナー付着がなuX、また極めて色の透過度のよい磁性
カラートナーを作成することができる。
Conventional technology An electrostatic latent image formed in electrophotography, electrostatic printing, electrostatic recording, etc. An electrostatic latent image (generally developed with toner, then transferred to paper and visualized through a fixing process) The method for developing is to charge toner particles and then attach them to a photoreceptor carrying an electrostatic latent image by electrostatic attraction.
In the process of visualization, there are generally two methods for developing toner: a two-component development method in which the toner is mixed with something called a carrier, and a one-component development method in which the toner is used alone.The former method involves mixing and stirring the toner and carrier. Although the cascade development method using a glass beads carrier and the magnetic brush development method using an iron powder carrier are well known, in both of these methods, the toner in the developer is Since toner is consumed sequentially during the development process, it is necessary to replenish toner during development and maintain the ratio of toner to carrier in the developer at all times within a certain range. In some cases, the surface may deteriorate due to oxidation and the triboelectric charging behavior with the toner may change.In other words, if the toner contains magnetic substances, the triboelectrification series of these magnetic substances and the oxidized carrier and the oxidation may occur. Because there is a discrepancy in the triboelectrification series with the carrier that does not receive the charge, the charge polarity of the carrier may show the opposite polarity to the desired polarity.This causes undesirable carrier adhesion to the image and toner adhesion to non-image areas. However, various methods have been proposed to avoid the disadvantages associated with two-component development, such as those that cause fog. Various methods have also been proposed for using toner alone. Fur brush development method using a brush
Powder cloud development method that uses toner particles in a pine dew state Non-contact development method that uses periodic changes in electric field, etc. Methods that use magnetic toner containing magnetic material include one-component magnetic brush development method, etc. However, in the above-mentioned developing method, magnetite or ferrite has been used as the magnetic substance contained in the magnetic toner, and these magnetic substances have a black or dark brown color. In order to obtain clear color images, ζ is a major problem. Therefore, as a color toner development method (
A non-magnetic component development method has been used, which uses non-magnetic color toner that does not contain magnetic material.
However, in the method using non-magnetic color toner as described above, the restraining force that holds the toner on the sleeve is insufficient. It is weak because it relies on the toner charge and intermolecular force (l)
The toner layer must be made thin and the image density cannot be increased.Also, there is a problem that toner scatters and toner adheres to non-image areas. In order to solve the above-mentioned problems, the magnetic color toner ζ of the present invention is provided.
This invention contains an organic magnetic material, and the present invention uses the above-described structure to bind toner with magnetic force and form a thick toner layer on the sleeve.As a result, a large amount of toner adheres to the electrostatic latent image. This allows you to obtain high-density images. In addition, the adhesion of torches to non-image areas can be prevented by the magnetic binding force. Moreover, since the organic magnetic material is used, the color reproducibility of the color toner is good. Although the toner will be explained, the present invention is not limited to these examples (the parts represent parts by weight). Using tetracyanoethylene, they were mixed and crystallized to create an organic magnetic material.Next, a toner was created based on these materials.Styrene acrylic resin 100 parts organic magnetic material
50 parts polypropylene wax
5 Convenient metal complex (charge control agent) 3
1 part Carmine 6B (magenta pigment) 3 parts A mixture consisting of the above composition was melt-kneaded at 130°C in a roll mill.
After cooling, it was coarsely pulverized with a cutter mill, then finely pulverized with a jet mill, and classified into 4 to 25 μm by wind classification, and then 0.5% by weight of silica was added externally with a Henshil mixer to obtain a magenta color magnetic toner. When we conducted a copying test using Octopus toner using a digital copying machine FP-C1 (Matsushita Electric), we were able to obtain clear magenta-colored images. Q: After continuous copying of 10,000 sheets, stable high-density images with an image density of 1.3 to 1.4 continued.9 Also, toner adhesion to non-image areas was not observed.l, L Very clear magenta-colored image Further, when the OHP sheet was passed through, an OHP image with extremely good color transparency was obtained.Example 2 An organic magnetic material was created in the same manner as in Example 1, and then toner was applied to the magnetic material. Created styrene acrylic resin 100 parts organic magnetic material
50 parts polypropylene wax
5-convenient metal complex (charge control agent)
3 parts disazo yellow (yellow pigment) 3 parts The mixture consisting of the above composition was melt-kneaded at 130°C in a roll mill, and after cooling, it was coarsely pulverized with a cutter mill, then finely pulverized with a jet mill, and then classified into 4-25μ particles by air classification. Then, 0.5% by weight of silica was added externally using a Henshil mixer to obtain a yellow magnetic toner. Using this toner, a copying test was conducted using a commercially available copying machine L-300 (manufactured by Matsushita Electric). A clear yellow image was obtained. After continuous copying of 10,000 sheets, a stable high-density image with an image density of 1.25 to 1.35 was obtained. Also, there was no toner adhesion to the non-image area. A clear yellow image was obtained.Furthermore, when passed through an OHP sheet, the color transparency was extremely good.
A HP image was obtained.Example 3 An organic magnetic material was prepared in the same manner as in Example 1, and then a toner was prepared using the magnetic material.9 Styrene acrylic resin 100 parts of the organic magnetic material
50 parts polypropylene wax
5-convenient metal complex (charge control agent)
3 parts Copper phthalocyanine (cyan pigment) 3 parts The mixture consisting of the above composition was melt-kneaded at 130°C in a roll mill, and after cooling, it was coarsely pulverized with a cutter mill, then finely pulverized with a jet mill, and then classified into 4-25 μ by air classification. Then, 0.5% by weight of silica was added externally using a Henshil mixer to obtain a cyan magnetic toner. Using this toner, a copying test was conducted using a commercially available copying machine L-300 (manufactured by Matsushita Electric). A clear cyan-colored image was obtained.9 When 10,000 sheets were continuously copied, a stable high-density image with an image density of 1.35 to 1.45 was obtained.9 Also, no toner adhesion to the non-image area was observed. A clear cyan image was obtained.
OHP with extremely good color transparency when passed through the P sheet
As described above, the present invention contains organic magnetic powder in the color toner, so that the image density is sufficiently high, the toner does not adhere to non-image areas, and the color transparency is extremely high. It is possible to create good magnetic color toner.

代理人の氏名 弁理士 小鍜治 明 ほか2名Name of agent: Patent attorney Akira Okaji 2 others

Claims (1)

【特許請求の範囲】[Claims] 有機磁性体を含有することを特徴とする磁性カラートナ
ー。
A magnetic color toner characterized by containing an organic magnetic substance.
JP2305111A 1990-11-09 1990-11-09 Magnetic color toner Pending JPH04177256A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2305111A JPH04177256A (en) 1990-11-09 1990-11-09 Magnetic color toner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2305111A JPH04177256A (en) 1990-11-09 1990-11-09 Magnetic color toner

Publications (1)

Publication Number Publication Date
JPH04177256A true JPH04177256A (en) 1992-06-24

Family

ID=17941232

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2305111A Pending JPH04177256A (en) 1990-11-09 1990-11-09 Magnetic color toner

Country Status (1)

Country Link
JP (1) JPH04177256A (en)

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