JP3073171B2 - Non-magnetic one-component development method - Google Patents
Non-magnetic one-component development methodInfo
- Publication number
- JP3073171B2 JP3073171B2 JP5859797A JP5859797A JP3073171B2 JP 3073171 B2 JP3073171 B2 JP 3073171B2 JP 5859797 A JP5859797 A JP 5859797A JP 5859797 A JP5859797 A JP 5859797A JP 3073171 B2 JP3073171 B2 JP 3073171B2
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- JP
- Japan
- Prior art keywords
- magnetic
- inorganic fine
- developer
- fine particles
- component
- 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.)
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- Dry Development In Electrophotography (AREA)
- Developing Agents For Electrophotography (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は非磁性トナーを用いて静
電潜像を現像する非磁性一成分現像方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-magnetic one-component developing method for developing an electrostatic latent image using a non-magnetic toner.
【０００２】[0002]
【従来の技術】一般に電子写真法は感光体上に電気的に
潜像を形成して、ついで該潜像をトナーによって現像
し、必要に応じて紙などの転写材にトナー画像を転写し
た後、加熱、加圧などの手段によって定着し複写物を得
るものである。このような電子写真法に用いられる現像
剤としてはトナーとキャリアからなる二成分現像剤と、
トナーとキャリアの機能を同時に備えた一成分現像剤と
がある。一成分現像剤は、さらに磁性一成分現像剤と、
非磁性一成分現像剤に分類される。二成分現像剤は、転
写性、定着性、耐環境特性などの電子写真特性に優れる
反面、トナーとキャリアの比を制御するためのトナー濃
度センサーが必要であること、現像剤の寿命が短い、現
像剤の攪拌機構が複雑化するなどの問題点を有する。一
方、磁性一成分現像剤は、上記のトナー濃度センサーが
不要であり、現像装置の小型化が容易である反面、磁性
粒子を含むことから、定着性が劣る問題を有する。この
ような背景から装置の小型簡易化と電子写真特性を両立
するために、近年、非磁性一成分現像剤を用いる現像方
法が提案、実用化されている。2. Description of the Related Art In general, in an electrophotographic method, a latent image is formed electrically on a photoreceptor, the latent image is developed with toner, and a toner image is transferred to a transfer material such as paper as necessary. The image is fixed by means such as heat, pressure and the like to obtain a copy. As a developer used in such an electrophotographic method, a two-component developer composed of a toner and a carrier,
There is a one-component developer having both functions of a toner and a carrier. The one-component developer further includes a magnetic one-component developer,
It is classified as a non-magnetic one-component developer. The two-component developer has excellent electrophotographic properties such as transferability, fixability, and environmental resistance, but requires a toner concentration sensor to control the ratio of toner to carrier, and has a short developer life. There is a problem that the stirring mechanism of the developer becomes complicated. On the other hand, the magnetic one-component developer does not require the above-mentioned toner concentration sensor, and can easily reduce the size of the developing device, but has a problem that the fixing property is inferior because it contains magnetic particles. In view of such a background, a developing method using a non-magnetic one-component developer has been proposed and put to practical use in order to achieve both the simplification of the size of the apparatus and the electrophotographic characteristics.
【０００３】非磁性一成分現像方法には、現像剤を有す
る現像ローラーを静電潜像を有する感光体と接触させて
現像する接触型の非磁性一成分現像方法と、現像ローラ
ーと感光体の間に一定の空隙ギャップを設けて現像ロー
ラー上の現像剤を飛翔させて現像する非磁性一成分現像
方法とがある。すなわち、いずれにしても現像ローラー
上に均一な現像剤の薄層を形成する必要がある。The non-magnetic one-component developing method includes a contact type non-magnetic one-component developing method in which a developing roller having a developer is brought into contact with a photoreceptor having an electrostatic latent image to perform development. There is a non-magnetic one-component developing method in which a certain gap is provided between the developing rollers and the developer on the developing roller flies and is developed. That is, in any case, it is necessary to form a uniform thin layer of the developer on the developing roller.
【０００４】一般には、ゴムや高い硬度の金属からなる
層規制部材を一定の圧力にて、現像ローラーに当接し、
該当接部分に粒子を通過させることで、現像ローラー面
へ現像剤粒子を付着し、現像剤層を形成している。In general, a layer regulating member made of rubber or high hardness metal is brought into contact with a developing roller at a constant pressure,
By passing the particles through the contact portion, the developer particles adhere to the surface of the developing roller to form a developer layer.
【０００５】上記従来の非磁性一成分現像法に使用され
る現像剤を構成する材料は、結着樹脂として、熱可塑性
ポリエステル樹脂、熱可塑性スチレンアクリル共重合樹
脂などに着色剤としてカーボンブラックや、シアン、マ
ゼンタ、イエローなどの有彩色顔料、および荷電制御剤
として、負極性であれば、金属錯体あるいは錯塩などを
用い、必要に応じて熱定着助剤としてポリプロピレン、
ポリエチレンなどのワックスを用い、エクストルーダ
ー、２軸ローラーなどで溶融混練後、ジェットミル、気
流式分級器などを組合わせて粉砕分級し、着色粒子を得
る。得られた着色粒子の表面に、シリカなどの微粒子を
ヘンシェルミキサーなどの攪拌混合手段を用いて付着
し、非磁性一成分現像剤を得ている。[0005] The material constituting the developer used in the above-mentioned conventional non-magnetic one-component developing method is a binder resin such as a thermoplastic polyester resin, a thermoplastic styrene acryl copolymer resin, a carbon black or a coloring agent. Cyan, magenta, chromatic color pigments such as yellow, and as a charge control agent, if negative polarity, use a metal complex or complex salt, etc., polypropylene as a heat fixing aid if necessary,
After melt-kneading with a wax such as polyethylene using an extruder, a twin-screw roller or the like, the mixture is pulverized and classified using a combination of a jet mill, an airflow classifier and the like to obtain colored particles. Fine particles such as silica are adhered to the surface of the obtained colored particles using a stirring and mixing means such as a Henschel mixer to obtain a non-magnetic one-component developer.
【０００６】[0006]
【発明が解決しようとする課題】上記従来の非磁性一成
分現像剤は、上記層形成部材と現像ローラーの当接部を
通過する際に、その接触、摺動により発生する摩擦熱に
より層規制部材に融着するという問題を発生させてい
た。現像剤が層規制部材に融着すると、現像剤の摩擦帯
電性が損なわれ、その結果として、比電荷が低下し、そ
の結果、スリーブに対するトナー粒子の現像力が低下
し、現像剤層にムラが発生したり、更に悪化すれば、現
像剤飛散を生ずる問題が発生していた。また、外添剤が
当接部における応力により、現像剤粒子に埋没し、現像
剤の流動性を著しく低下し、その結果として、現像ロー
ラーへの現像剤の搬送性が著しく低下し、画像濃度の低
下を来すことが問題とされてきた。また、このように現
像剤の荷電性が低下することにより、非画像部のかぶり
も増加する問題点をも生ずるものであった。特に、層規
制部材が金属製である場合には、ゴム製のブレードに比
べて、当接部の現像ローラーとの接触面積が小さいこと
から、同じ押圧力でも局所的には現像剤粒子への機械的
ストレスが大きくて、上記の融着が発生し易いという問
題があった。When the conventional non-magnetic one-component developer passes through the contact portion between the layer forming member and the developing roller, the layer is regulated by frictional heat generated by the contact and sliding. This causes a problem of fusing to a member. When the developer is fused to the layer regulation member, is impaired triboelectric chargeability of the developer, as a result, the specific charge is decreased, as a result, the current image force of the toner particles is reduced with respect to the sleeve, the developer layer If unevenness occurs or worsens, the problem of developer scattering has occurred. In addition, the external additive is buried in the developer particles due to the stress at the contact portion, and the fluidity of the developer is significantly reduced. As a result, the transportability of the developer to the developing roller is significantly reduced, and the image density is reduced. Has been a problem. In addition, a decrease in the chargeability of the developer causes a problem that the fogging of the non-image portion also increases. In particular, when the layer regulating member is made of metal, the contact area with the developing roller at the contact portion is smaller than that of the rubber blade, so that even if the same pressing force is applied, the layer is locally applied to the developer particles. There is a problem that the mechanical fusion is large and the above-mentioned fusion easily occurs.
【０００７】[0007]
【課題を解決するための手段】本発明者らは、この点の
解決をするために鋭意研究の結果、ブリネル硬度が１０
０〜１６０の金属製の層規制部材と、比表面積が８０ｍ
2 ／ｇ以上の無機微粒子（Ａ）と８０ｍ2 ／ｇ未満の無
機微粒子（Ｂ）とを複合して非磁性トナーの表面に付着
させた非磁性一成分現像剤を使用する非磁性一成分現像
方法を提供するものである。また、前記無機微粒子
（Ａ）は、シリカ、アルミナ、酸化チタンの群から選ば
れる少なくとも１種としたものを用い、更にまた、前記
無機微粒子（Ｂ）はその真円度が０．６〜０．９５であ
るものを用いることで、上記の目的である層規制部材へ
のトナー融着のない現像性の良好な非磁性一成分現像方
法を提供できることを見出し、本発明を完成するに至っ
た。Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve this problem and found that the Brinell hardness was 10%.
A metal layer regulating member of 0 to 160 and a specific surface area of 80 m
Non-magnetic one-component development using a non-magnetic one-component developer in which inorganic fine particles (A) of 2 / g or more and inorganic fine particles (B) of less than 80 m 2 / g are combined and adhered to the surface of a non-magnetic toner It provides a method. The inorganic fine particles (A) used are at least one selected from the group consisting of silica, alumina and titanium oxide, and the inorganic fine particles (B) have a roundness of 0.6 to 0. It has been found that the use of a non-magnetic one-component developing method of .95 can provide a non-magnetic one-component developing method having good developability without toner fusion to the layer regulating member, which is the object of the present invention, and completed the present invention. .
【０００８】即ち本発明は以下のとおりである。請求項
１の発明は非磁性一成分現像剤を現像ローラーに供給
し、層規制部材により該非磁性一成分現像剤の薄層を現
像ローラーの表面に供給するとともに、電荷を与え、感
光体ドラムと現像ローラーとの電位差により、該非磁性
一成分現像剤を、静電潜像を保持する感光体ドラムに現
像し、ついで転写材に転写を行う非磁性一成分現像剤の
現像方法であって、前記層規制部材が金属製であり、そ
のブリネル硬度が１００〜１６０の範囲であり、かつ、
前記非磁性一成分現像剤が非磁性トナーの表面に、比表
面積が８０ｍ2 ／ｇ以上の無機微粒子（Ａ）と８０ｍ2
／ｇ未満の無機微粒子（Ｂ）とが複合して付着されてい
ることを特徴とするものである。請求項２の発明は、無
機微粒子（Ａ）がシリカ、アルミナ、酸化チタンから選
ばれる少なくとも１種類であることを特徴とするもので
ある。請求項３の発明は、無機微粒子（Ｂ）の真円度が
０．６〜０．９５であることを特徴とするものである。That is, the present invention is as follows. The invention according to claim 1 supplies a non-magnetic one-component developer to a developing roller, supplies a thin layer of the non-magnetic one-component developer to a surface of the developing roller by a layer regulating member, gives a charge to the photosensitive drum, and A method for developing a non-magnetic one-component developer, wherein the non-magnetic one-component developer is developed on a photosensitive drum holding an electrostatic latent image by a potential difference from a developing roller, and then transferred to a transfer material, The layer regulating member is made of metal, has a Brinell hardness of 100 to 160, and
Wherein the non-magnetic one-component developer surface of the non-magnetic toner, a specific surface area of 80 m 2 / g or more inorganic fine particles (A) and 80 m 2
/ G of inorganic fine particles (B). The invention of claim 2 is characterized in that the inorganic fine particles (A) are at least one selected from silica, alumina and titanium oxide. The invention according to claim 3 is characterized in that the roundness of the inorganic fine particles (B) is 0.6 to 0.95.
【０００９】[0009]
【発明の実施の形態】次に、上記非磁性一成分現像剤を
使用した本発明の現像方法について詳細に説明する。図
１は、本発明の非磁性一成分現像方法に使用する現像装
置の概略構成図である。図中、１は円筒状の静電潜像保
持体である感光体ドラム、２はホッパー、３は非磁性一
成分現像剤、４は層規制部材、５は現像ローラー、６は
現像剤の漏れ防止およびかき落とし部材、７は攪拌機で
ある。この現像装置においては、感光体ドラム１上に
は、公知の電子写真法によって静電潜像が形成される。
ホッパー２内には非磁性一成分現像剤３が収容されてお
り、非磁性一成分現像剤３は、層規制部材４によって現
像ローラー５のスリーブ上に一定の層厚になるように担
持されるとともに層規制部材４との摩擦により電荷が付
与され搬送される。現像ローラーには直流または必要に
応じて交流電圧を印加するようにしてもよい。現像ロー
ラー５に担持された非磁性一成分現像剤は、現像ローラ
ー５の回転により搬送されて、静電潜像を有する感光体
ドラム１と接触し、現像ローラー５との電位差によって
感光体ドラム１の表面に現像され静電潜像の顕像化が行
われる。Next, the developing method of the present invention using the non-magnetic one-component developer will be described in detail. FIG. 1 is a schematic configuration diagram of a developing device used in the non-magnetic one-component developing method of the present invention. In the figure, 1 is a photosensitive drum which is a cylindrical electrostatic latent image holding member, 2 is a hopper, 3 is a non-magnetic one-component developer, 4 is a layer regulating member, 5 is a developing roller, and 6 is leakage of developer. The prevention and scraping member 7 is a stirrer. In this developing device, an electrostatic latent image is formed on the photosensitive drum 1 by a known electrophotographic method.
A non-magnetic one-component developer 3 is contained in the hopper 2, and the non-magnetic one-component developer 3 is carried on the sleeve of the developing roller 5 by the layer regulating member 4 so as to have a constant layer thickness. At the same time, electric charges are applied by friction with the layer regulating member 4 and conveyed. DC or AC voltage may be applied to the developing roller as needed. The non-magnetic one-component developer carried on the developing roller 5 is conveyed by the rotation of the developing roller 5, comes into contact with the photosensitive drum 1 having an electrostatic latent image, and is caused by a potential difference from the developing roller 5. To develop an electrostatic latent image.
【００１０】本発明における上記の方法において使用す
る非磁性一成分現像剤を構成する非磁性トナーは、結着
剤樹脂と着色剤を主成分とするものである。結着剤樹脂
としては、例えば、ポリスチレン、ポリエステル、アク
リル樹脂、スチレン−アクリル系共重合体、エチレン−
塩化ビニル系共重合体、エチレン−酢酸ビニル系共重合
体、ポリアミド、ポリエチレン、マレイン酸樹脂、キシ
レン樹脂、フェノール樹脂等があげられるが、これらに
限定されるものではない。また、着色剤としては、例え
ば、カーボンブラック、アセチレンブラック、ランプブ
ラック、チャンネルブラック、アニリンブラック等の黒
色着色剤や、有彩色であればファーナルブルー、パーマ
ネントブルー、ニグロシンブルー、フタロシアニン系シ
アン色顔料、ローズベンガル、キサンテン系マゼンタ色
染料、キナクリドン系マゼンタ色顔料、モノアゾ系赤色
顔料、ジスアゾ系黄色顔料等があげられるが、これらに
限定されるものではない。これら着色剤は、結着剤樹脂
中に１〜１５重量％の範囲で適宜配合される。上記非磁
性一成分現像剤には、所望により他の成分、例えば帯電
制御剤、低分子量ポリプロピレン等の定着助剤等を含有
させてもよい。また、本発明の非磁性一成分現像剤は、
体積平均粒子径で１２μｍ以下、好ましくは、３〜９．
５μｍの粒子径を有するものがよい。３μｍ未満である
と、十分な流動性が得られない。一方、９．５μｍより
大きいと細線、文字等の画素の再現性が悪くなる。[0010] The non-magnetic toner constituting the non-magnetic one-component developer used in the above method of the present invention is mainly composed of a binder resin and a colorant. As the binder resin, for example, polystyrene, polyester, acrylic resin, styrene-acrylic copolymer, ethylene-
Examples include, but are not limited to, vinyl chloride copolymers, ethylene-vinyl acetate copolymers, polyamides, polyethylenes, maleic resins, xylene resins, phenolic resins, and the like. Examples of the colorant include, for example, black colorants such as carbon black, acetylene black, lamp black, channel black, and aniline black. , Rose bengal, xanthene-based magenta dyes, quinacridone-based magenta color pigments, monoazo-based red pigments, disazo-based yellow pigments, and the like, but are not limited thereto. These colorants are appropriately blended in the binder resin in a range of 1 to 15% by weight. The non-magnetic one-component developer may contain other components, if desired, such as a charge control agent and a fixing aid such as low molecular weight polypropylene. Further, the non-magnetic one-component developer of the present invention,
12 μm or less in volume average particle diameter, preferably 3 to 9.
Those having a particle diameter of 5 μm are preferred. If it is less than 3 μm, sufficient fluidity cannot be obtained. On the other hand, if it is larger than 9.5 μm, the reproducibility of pixels such as fine lines and characters deteriorates.
【００１１】本発明において、非磁性トナーに付着され
る無機微粒子（Ａ）は、その比表面積が、８０ｍ2 ／ｇ
以上であるものが望ましい。更に望ましくは、１４０ｍ
2 ／ｇ以上の比表面積のものが好適である。なお、本発
明でいう比表面積は窒素吸着法によるＢＥＴ比表面積で
ある。比表面積が８０ｍ2 ／ｇ未満である場合には、無
機微粒子（Ａ）の１次粒子径が大きくなることで、非磁
性一成分現像剤の流動性が低下し、その結果、現像ロー
ラーへの搬送性が低下し、十分な現像性が得られない。
無機微粒子（Ｂ）は比表面積が８０ｍ2 ／ｇ未満かつ、
その真円度が０．６〜０．９であることが望ましい。In the present invention, the inorganic fine particles (A) attached to the non-magnetic toner have a specific surface area of 80 m 2 / g.
The above is desirable. More preferably, 140 m
Those having a specific surface area of 2 / g or more are preferred. The specific surface area referred to in the present invention is a BET specific surface area measured by a nitrogen adsorption method. When the specific surface area is less than 80 m 2 / g, the primary particle diameter of the inorganic fine particles (A) is increased, so that the fluidity of the non-magnetic one-component developer is reduced. The transportability decreases, and sufficient developability cannot be obtained.
The inorganic fine particles (B) have a specific surface area of less than 80 m 2 / g and
It is desirable that the roundness is 0.6 to 0.9.
【００１２】無機微粒子（Ｂ）を添加する目的の１つ
は、連続撮像時における非磁性一成分現像剤の流動性低
下を防止する点にある。即ち、無機微粒子（Ａ）は前記
の如くその比表面積が８０ｍ2 ／ｇ以上あることで、多
数枚複写の初期段階においては非磁性一成分現像剤の流
動性を高めることができるが、このような比表面積の大
きいものは、連続撮像時において、現像器を構成する部
材、特に、層規制部材、現像ローラー、感光体などによ
り、繰り返し機械的なストレスを受けることで、現像剤
の粒子の表面内へ埋没しやすい。その結果、現像剤とし
ての流動性が著しく低下する。無機微粒子（Ｂ）はその
比表面積が小さいことで、１次粒子径は無機微粒子
（Ａ）より大きく、無機微粒子（Ａ）に直接的にかかる
機械的ストレスを緩和することで、無機微粒子（Ａ）の
現像剤粒子表面への埋没を抑制し、流動性の低下を防ぐ
機能がある。One of the purposes of adding the inorganic fine particles (B) is to prevent a decrease in the fluidity of the non-magnetic one-component developer during continuous imaging. That is, as described above, the inorganic fine particles (A) have a specific surface area of 80 m 2 / g or more, so that the fluidity of the non-magnetic one-component developer can be increased in the initial stage of multi-sheet copying. Those having a large specific surface area are subjected to repeated mechanical stress by the members constituting the developing device, in particular, the layer regulating member, the developing roller, the photoreceptor, etc. at the time of continuous imaging, so that the surface of the developer particles is It is easy to be buried inside. As a result, the fluidity of the developer is significantly reduced. Since the inorganic fine particles (B) have a small specific surface area, the primary particle diameter is larger than that of the inorganic fine particles (A). ) Has a function of suppressing burying of the developer particles in the surface of the developer particles and preventing a decrease in fluidity.
【００１３】更に無機微粒子（Ｂ）を用いる、別の目的
は、以下の点にある。即ち、無機微粒子（Ａ）は、アル
ミナ、シリカ、酸化チタンから選ばれる少なくとも１種
を用いるが、このような材質の無機微粒子を用いた場合
には、層規制部材へ優先的に付着あるいは傷をつけ、し
かる後にその付着あるいは傷部分を起点として現像剤が
黒点状に付着、あるいはフィルミングを起こす場合があ
る。このような現象が生じた場合、現像剤層が不均一に
なる他現像剤の帯電が不充分となり、現像性が著しく低
下する。Another object of using the inorganic fine particles (B) is as follows. That is, as the inorganic fine particles (A), at least one selected from alumina, silica, and titanium oxide is used. However, when inorganic fine particles of such a material are used, the inorganic fine particles (A) preferentially adhere to or scratch the layer regulating member. After that, there is a case where the developer adheres in the form of black spots or filming starts from the adhered or damaged portion. When such a phenomenon occurs, the developer layer becomes non-uniform, and the charge of the developer becomes insufficient, so that the developability is significantly reduced.
【００１４】しかるに本発明では、比表面積が小さく１
次粒子径が大きい無機微粒子（Ｂ）を用いることで、上
記のキズ、あるいはフィルミングを大幅に低減できるこ
とを見出した。この原因については、必ずしも明らかで
はないが、無機微粒子（Ｂ）が一旦付着した無機微粒子
（Ａ）または現像剤粒子を研磨してかきおとす効果、お
よび、無機微粒子（Ａ）の現像器部材への付着を防止す
る効果があるものと思われる。このような目的で、用い
られる無機微粒子（Ｂ）の材質として特に有効なものと
しては、シリカ、Ｆｅ3 Ｏ4 （マグネタイト）、Ｆｅ2
Ｏ3 、炭化ケイ素、酸化セリウム、アルミナ、酸化亜
鉛、硫酸バリウム、酸化チタン、等があげられるが、こ
れらに限定されるものではない。According to the present invention, however, the specific surface area is small.
It has been found that the use of the inorganic fine particles (B) having a large secondary particle diameter can significantly reduce the above-mentioned scratches or filming. Although the cause is not necessarily clear, the effect of polishing and scraping the inorganic fine particles (A) or the developer particles to which the inorganic fine particles (B) are once adhered, and the effect of the inorganic fine particles (A) on the developing device member It seems that it has the effect of preventing adhesion. Particularly effective materials for the inorganic fine particles (B) used for such a purpose include silica, Fe 3 O 4 (magnetite), Fe 2
Examples include, but are not limited to, O 3 , silicon carbide, cerium oxide, alumina, zinc oxide, barium sulfate, titanium oxide, and the like.
【００１５】次に、本発明で用いられる無機微粒子
（Ｂ）の形状としては、その真円度が０．６〜０．９５
の範囲であることが望ましい。０．６未満である場合
は、その形状がより不定形に近くなることで無機微粒子
（Ａ）の流動性向上効果を阻害することとなる。一方、
０．９５より大きい場合は、現像剤粒子の表面への付着
が弱く、その結果現像剤から分離し、感光体や現像器部
材を汚染する場合があり、プロセスに不都合を生ずる場
合がある。Next, the shape of the inorganic fine particles (B) used in the present invention has a roundness of 0.6 to 0.95.
Is desirably within the range. If it is less than 0.6, the shape becomes closer to an irregular shape, which impairs the effect of improving the fluidity of the inorganic fine particles (A). on the other hand,
When it is larger than 0.95, the developer particles are weakly adhered to the surface, and as a result, the developer particles may be separated from the developer and contaminate the photosensitive member and the developing device member, which may cause inconvenience in the process.
【００１６】本発明における無機微粒子（Ｂ）の真円度
は、以下に規定される方法で、測定する。真円度は以下
の式で規定する。 Ｃ＝（４πＳ）／ｌ2 ・・・（１） ・Ｓは無機微粒子（Ｂ）の投影面積 ・ｌは無機微粒子（Ｂ）の周囲長 無機微粒子（Ｂ）の投影面積Ｓ、および周囲長ｌは以下
の方法で、測定する。まず、無機微粒子（Ｂ）を現像剤
に単体にて混合外添する。現像剤に対する混合比は、無
機微粒子（Ｂ）の比重によって変わるため、一律ではな
いが、約０．５〜３重量部（現像剤１００重量部に対し
て）とする。混合外添は、ヘンシェルミキサーを用いて
行う。得られた混合物をＳＥＭにて観察し、なるべく現
像剤粒子の平滑な面が観察される視野を選んで３０００
０倍にて撮影する。得られた写真で付着が至る所にあ
る。無機微粒子（Ｂ）を画像解析し、Ｓおよびｌを求め
（１）式により真円度Ｃを求める。無機微粒子（Ｂ）の
サンプルリング粒子は約３００個とする。The roundness of the inorganic fine particles (B) in the present invention is measured by the method specified below. The roundness is defined by the following equation. C = (4πS) / l 2 (1) S is the projected area of the inorganic fine particles (B). L is the peripheral length of the inorganic fine particles (B). The projected area S of the inorganic fine particles (B) and the peripheral length l Is measured by the following method. First, the inorganic fine particles (B) are mixed and externally added to the developer alone. The mixing ratio with respect to the developer varies depending on the specific gravity of the inorganic fine particles (B), and is not uniform, but is about 0.5 to 3 parts by weight (based on 100 parts by weight of the developer). External mixing is performed using a Henschel mixer. Observe the obtained mixture by SEM, and select a visual field in which a smooth surface of the developer particles is observed as much as possible, and select 3000.
Shoot at 0x. The adhesion is ubiquitous in the obtained photographs. The inorganic fine particles (B) are image-analyzed, S and l are determined, and the roundness C is determined by equation (1). The number of sampling particles of the inorganic fine particles (B) is about 300.
【００１７】本発明に用いることのできる層規制部材
は、金属製のものであり、そのブリネル硬度ＨＢ）が１
００〜１６０であることが必要である。ＨＢが１００未
満である場合は、上記無機微粒子（Ａ）および（Ｂ）を
組み合わせることによっても、現像剤の層規制部材への
融着が発生する場合がある。一方ＨＢが１６０を超える
場合には、層規制部材を現像器に装着した場合の現像ロ
ーラーとの当接による層規制部材のたわみ量に対する押
圧の変化が急峻であり、実使用面での問題がある他、無
機微粒子（Ｂ）を併用しても、無機微粒子（Ａ）の現像
剤粒子表面への埋没が発生しやすく、非磁性一成分現像
剤の流動性が低下しやすい。The layer regulating member that can be used in the present invention is made of metal and has a Brinell hardness H B ) of 1
It needs to be 00 to 160. If H B is less than 100 by combining the above inorganic fine particles (A) and (B), there is a case where fusing to the layer regulation member of the developer occurs. On the other hand if the H B exceeds 160, a steep pressing changes in relative deflection of the layer regulating member by contact with the developing roller in the case of mounting the layer regulating member in the developing device, a problem in actual use surface presents, be used in combination the inorganic fine particles (B), buried in the developer particle surfaces is liable to occur in the inorganic fine particles (a), the flowability of a non-magnetic one-component developer is likely to win low.
【００１８】[0018]
【作用】連続において、現像に供するに十分な安定した
現像剤層を現像ローラー上に形成するためには層規制部
材への非磁性一成分の現像剤の融着を防ぐことが必要で
ある。この目的のために、比表面積が８０ｍ2 ／ｇ以上
の無機微粒子（Ａ）に対して、比表面積が８０ｍ2 ／ｇ
未満かつ、真円度が０．６〜０．９５の無機微粒子
（Ｂ）を複合して粒子表面に外添した非磁性一成分現像
剤と、ブリネル硬度１００〜１６０の層規制部材を使用
した現像方法を用いることで、融着のない安定したトナ
ー層を得ることができ、長期にわたり良好な現像性を保
つことが可能となる。In order to continuously form a stable developer layer on the developing roller sufficient for development, it is necessary to prevent the non-magnetic one-component developer from being fused to the layer regulating member. For this purpose, with respect to a specific surface area of 80 m 2 / g or more inorganic fine particles (A), specific surface area of 80 m 2 / g
A non-magnetic one-component developer in which inorganic fine particles (B) having a roundness of less than 0.6 and 0.95 are compounded and externally added to the particle surface, and a layer regulating member having a Brinell hardness of 100 to 160 were used. By using the developing method, a stable toner layer without fusing can be obtained, and good developability can be maintained for a long time.
【００１９】[0019]
【実施例】以下、実施例に基づき本発明を説明する。な
お、実施例において部とは、重量部を示す。 〔実施例１〕下記の配合で、原料の混合、溶融混練、粉
砕分級を行い、体積平均粒子径、７．５μｍの非磁性ト
ナーを得た。 ・スチレン−アクリル酸エステル共重合体樹脂 ９０部 （藤倉化成社製 モノマー組成：スチレン／ブチルアクリレート＝８５ ／１５） ・ポリプロピレンワックス ３部 （三洋化成工業社製 商品名：ビスコール３３０Ｐ） ・カーボンブラック ７部 （三菱化学社製 商品名：ＭＡ−１００） ・クロム錯塩系 荷電制御剤 ２部 （保土谷化学社製 商品名：Ｔ−９５） この非磁性トナー１００部に対して、無機微粒子（Ａ）
として比表面積：１４０ｍ2 ／ｇのシリカ（ワッカーケ
ミカル社製 商品名：Ｈ−２０００を１部および無機微
粒子（Ｂ）として比表面積４０ｍ2 ／ｇ、真円度０．８
０のシリカ（日本アエロジル社製 商品名：ＮＡＸ−５
０）を０．５部添加し、ヘンシェルミキサーで５分間撹
拌することで、本発明で使用する非磁性一成分現像剤を
得た。The present invention will be described below with reference to examples. In the examples, “parts” means “parts by weight”. Example 1 With the following composition, the raw materials were mixed, melt-kneaded, and pulverized and classified to obtain a non-magnetic toner having a volume average particle diameter of 7.5 μm.・ Styrene-acrylic ester copolymer resin 90 parts (Fujikura Kasei Co., Ltd., monomer composition: styrene / butyl acrylate = 85/15) ・ Polypropylene wax 3 parts (Sanyo Kasei Kogyo Co., Ltd., product name: Biscol 330P) ・ Carbon black 7 Part (Mitsubishi Chemical Corp. product name: MA-100)-Chromium complex charge control agent 2 parts (Hodogaya Chemical Co., Ltd. product name: T-95) 100 parts of this non-magnetic toner is added to inorganic fine particles (A)
Specific surface area: 140 m 2 / g of silica (trade name: H-2000 manufactured by Wacker Chemical Co., Ltd .: 1 part and inorganic fine particles (B), specific surface area: 40 m 2 / g, roundness: 0.8
Silica No. 0 (product name: NAX-5, manufactured by Nippon Aerosil Co., Ltd.)
0) was added, and the mixture was stirred for 5 minutes with a Henschel mixer to obtain a non-magnetic one-component developer used in the present invention.
【００２０】〔実施例２〕実施例１の非磁性トナー１０
０部に無機微粒子（Ａ）として比表面積２００ｍ2 ／ｇ
のシリカ（ワッカーケミカル社製 商品名：Ｈ−３００
４）を１部と実施例１の無機微粒子（Ｂ）を０．５部添
加し、実施例１と同様に外添して本発明で使用する非磁
性一成分現像剤を得た。[Embodiment 2] Non-magnetic toner 10 of Embodiment 1
0 parts by weight as inorganic fine particles (A) with a specific surface area of 200 m 2 / g
Silica (Product name: H-300 manufactured by Wacker Chemical Co., Ltd.)
1) and 0.5 part of the inorganic fine particles (B) of Example 1 were added, and externally added in the same manner as in Example 1 to obtain a non-magnetic one-component developer used in the present invention.
【００２１】〔実施例３〕実施例１の非磁性トナー１０
０部に無機微粒子（Ａ）として、比表面積２６０ｍ2 ／
ｇのシリカ（日本アエロジル社製 商品名：Ｒ−８１
２）を１．０部、無機微粒子（Ｂ）として、実施例１と
同様のものを０．５部添加して、実施例１と同様に外添
して本発明で使用する非磁性一成分現像剤を得た。[Embodiment 3] Non-magnetic toner 10 of Embodiment 1
0 parts as inorganic fine particles (A), specific surface area 260 m 2 /
g of silica (product name: R-81, manufactured by Nippon Aerosil Co., Ltd.)
2) 1.0 part, as inorganic fine particles (B), 0.5 parts of the same fine particles as in Example 1 were added, and externally added as in Example 1 to be used in the present invention. A developer was obtained.
【００２２】〔実施例４〕実施例１の非磁性トナー１０
０部に、無機微粒子（Ａ）として９０ｍ2 ／ｇのイソブ
チルトリメトキシシランで表面処理を行ったアルミナ粒
子を１．０部、無機微粒子（Ｂ）として、実施例１と同
様のものを０．５部添加して実施例１と同様に外添して
本発明で使用する非磁性一成分現像剤を得た。Embodiment 4 Non-magnetic toner 10 of Embodiment 1
In 0 parts, 1.0 parts of alumina particles subjected to surface treatment with 90 m 2 / g of isobutyltrimethoxysilane were used as inorganic fine particles (A), and the same inorganic fine particles (B) as in Example 1 were used. Five parts were added and externally added in the same manner as in Example 1 to obtain a non-magnetic one-component developer used in the present invention.
【００２３】〔実施例５〕 実施例１の非磁性トナー１００部に、無機微粒子（Ａ）
として９０ｍ２／ｇのメチルトリメトキシシランで表面
処理を行った酸化チタン粒子を１．０部、無機微粒子
（Ｂ）として、実施例１と同様のものを０．５部添加し
て、実施例１と同様に外添して本発明で使用する非磁性
一成分現像剤を得た。Example 5 In 100 parts of the non-magnetic toner of Example 1, inorganic fine particles (A) were added.
As 90m 2 / g 1.0 parts of methyl trimethoxy acid titanium particles subjected to surface treatment with silane, as the inorganic fine particles (B), the same as in Example 1 were added 0.5 parts of embodiment A non-magnetic one-component developer used in the present invention was externally added in the same manner as in Example 1.
【００２４】〔実施例６〕実施例１の非磁性トナー１０
０部に、無機微粒子（Ａ）として実施例１のものを１部
と、無機微粒子（Ｂ）として、比表面積９．７ｍ2 ／
ｇ、真円度０．８５のマグネタイト（戸田工業社製 商
品名：ＥＰＴ−５００）１部を添加して、実施例１と同
様に外添して本発明で使用する非磁性一成分現像剤を得
た。Embodiment 6 Non-magnetic toner 10 of Embodiment 1
0 parts, 1 part of the inorganic fine particles (A) of Example 1 and the inorganic fine particles (B) of 9.7 m 2 /
g, 1 part of magnetite having a roundness of 0.85 (trade name: EPT-500, manufactured by Toda Kogyo Co., Ltd.), and externally added in the same manner as in Example 1 to be used in the present invention. I got
【００２５】〔実施例７〕実施例１の非磁性トナー１０
０部に、無機微粒子（Ａ）として実施例１のものを１部
と、無機微粒子（Ｂ）として、比表面積２５ｍ2 ／ｇ、
真円度０．７０の酸化亜鉛（堺化学社製 商品名：Ｆ
INEX２５）を実施例１と同様の方法で外添して本発明で
使用する非磁性一成分現像剤を得た。[Embodiment 7] Non-magnetic toner 10 of Embodiment 1
0 parts, 1 part of the inorganic fine particles (A) of Example 1 and 25 parts of the inorganic fine particles (B) having a specific surface area of 25 m 2 / g;
Zinc oxide with a roundness of 0.70 (trade name: F, manufactured by Sakai Chemical Co., Ltd.)
INEX 25) was externally added in the same manner as in Example 1 to obtain a non-magnetic one-component developer used in the present invention.
【００２６】〔実施例８〕実施例１で、無機微粒子
（Ｂ）として比表面積３４ｍ2 ／ｇ、真円度０．８７の
α−酸化鉄を用いた以外は全て実施例１と同様にして、
本発明で使用する非磁性一成分現像剤を得た。Example 8 The procedure of Example 1 was repeated except that α-iron oxide having a specific surface area of 34 m 2 / g and a roundness of 0.87 was used as the inorganic fine particles (B). ,
A non-magnetic one-component developer used in the present invention was obtained.
【００２７】〔実施例９〕実施例１で、無機微粒子
（Ｂ）として比表面積８ｍ2 ／ｇ、真円度０．８５の硫
酸バリウムを用いた以外は全て実施例１と同様にして、
本発明で使用する非磁性一成分現像剤を得た。Example 9 The procedure of Example 1 was repeated except that barium sulfate having a specific surface area of 8 m 2 / g and a roundness of 0.85 was used as the inorganic fine particles (B).
A non-magnetic one-component developer used in the present invention was obtained.
【００２８】以上の実施例１〜９の非磁性一成分現像剤
を市販のレーザービームプリンター（京セラ社 Ｆ−１
０００+ プリンター）の現像器を改良したものを使用し
て図１に示した現像装置のホッパーに充填し、本発明の
現像方法を実施した。なお、その際層規制部材は、ブリ
ネル硬度が１２９のリン青銅製を用い、その場合の実施
例を実施例１〜９に対応して実施例１ａ〜９ａとした。
次に、実施例１〜９の現像剤に対してブリネル硬度が１
５０のステンレス製の層規制部材を用い、本発明の非磁
性現像法を実施例１ａ〜９ａに準じて実施した。その場
合の実施例を実施例１〜９に対応して実施例１ｂ〜９ｂ
とした。The non-magnetic one-component developer of each of Examples 1 to 9 was replaced with a commercially available laser beam printer (K-1).
000 + printer) and used in the developing apparatus shown in FIG. 1 to fill the hopper and implement the developing method of the present invention. In this case, the layer regulating member was made of phosphor bronze having a Brinell hardness of 129, and Examples in this case were Examples 1a to 9a corresponding to Examples 1 to 9.
Next, the Brinell hardness of the developer of Examples 1 to 9 was 1
The non-magnetic developing method of the present invention was carried out according to Examples 1a to 9a using 50 stainless steel layer regulating members. Embodiments in that case correspond to Embodiments 1b to 9b corresponding to Embodiments 1 to 9.
And
【００２９】〔比較例１〕実施例１の非磁性トナー１０
０部に対して、実施例１の無機微粒子（Ａ）のみを１部
混合外添し比較用の非磁性一成分現像剤を得た。Comparative Example 1 Non-magnetic toner 10 of Example 1
One part of the inorganic fine particles (A) of Example 1 was mixed and externally added to 0 parts to obtain a non-magnetic one-component developer for comparison.
【００３０】〔比較例２〕実施例１の非磁性トナー１０
０部に対して、実施例１の無機微粒子（Ｂ）のみを１部
混合外添し比較用の非磁性一成分現像剤を得た。Comparative Example 2 Non-magnetic toner 10 of Example 1
One part of the inorganic fine particles (B) of Example 1 was mixed and externally added to 0 parts to obtain a non-magnetic one-component developer for comparison.
【００３１】〔比較例３〕実施例１の非磁性トナー１０
０部に対して、実施例１の無機微粒子（Ａ）および比表
面積が２０ｍ2 ／ｇ、真円度が０．４のマグネタイトを
１部外添し比較用の非磁性一成分現像剤を得た。Comparative Example 3 Nonmagnetic Toner 10 of Example 1
0 parts of the inorganic fine particles (A) of Example 1 and one part of magnetite having a specific surface area of 20 m 2 / g and a roundness of 0.4 were externally added to obtain a non-magnetic one-component developer for comparison. Was.
【００３２】〔比較例４〕実施例１の非磁性トナー１０
０部に対して、実施例１の無機微粒子（Ａ）および比表
面積が７ｍ2 ／ｇ、真円度が０．９７のマグネタイトを
１部外添し比較用の非磁性一成分現像剤を得た。上記比
較例１〜４の非磁性一成分現像剤を実施例１ａ〜９ａの
レーザープリンターに準じて図１に示した現像装置のホ
ッパーに充填し、比較用の現像方法を実施した。その際
の層規制部材はブリネル硬度が１２９のリン青銅製を用
い、その場合の比較例を比較例１〜４に対応して比較例
１ａ〜４ａとした。Comparative Example 4 Nonmagnetic Toner 10 of Example 1
0 parts of the inorganic fine particles (A) of Example 1 and 1 part of magnetite having a specific surface area of 7 m 2 / g and a roundness of 0.97 were externally added to obtain a non-magnetic one-component developer for comparison. Was. The non-magnetic one-component developers of Comparative Examples 1 to 4 were charged into the hopper of the developing device shown in FIG. 1 according to the laser printers of Examples 1a to 9a, and a developing method for comparison was performed. At that time, the layer regulating member was made of phosphor bronze having a Brinell hardness of 129, and Comparative Examples 1a to 4a corresponding to Comparative Examples 1 to 4 in that case.
【００３３】〔比較例１ｂ〕実施例１ａの非磁性一成分
現像方法において、層規制部材をブリネル硬度が９０の
リン青銅製に代えた以外は同様にして比較例の非磁性一
成分現像方法を実施例１ａ〜９ａのレーザープリンター
に準じて実施した。[Comparative Example 1b] The non-magnetic one-component developing method of Comparative Example was carried out in the same manner as in the non-magnetic one-component developing method of Example 1a, except that the layer regulating member was replaced with phosphor bronze having a Brinell hardness of 90. It carried out according to the laser printer of Examples 1a-9a.
【００３４】〔比較例１ｃ〕実施例１ａの非磁性一成分
現像方法において、層規制部材をブリネル硬度が１８５
のステンレス製に代えた以外は同様にして比較例の非磁
性一成分現像方法を実施例１ａ〜９ａのレーザープリン
ターに準じて実施した。[Comparative Example 1c] In the non-magnetic one-component developing method of Example 1a, the layer regulating member was changed to have a Brinell hardness of 185.
The non-magnetic one-component developing method of the comparative example was carried out in the same manner as in Examples 1a to 9a except that the stainless steel printer was used.
【００３５】上記で実施された現像方法の複写枚数の初
期から５０００枚までの連続複写の評価結果を表１に示
す。ここで、各特性項目について説明する。Table 1 shows the evaluation results of continuous copying from the initial number of copies to 5000 copies in the developing method carried out as described above. Here, each characteristic item will be described.
【００３６】＜融着状態＞層規制部材の現像ローラーと
の当接面をバキュームクリーナで吸引後、目視評価 ○：現像剤の融着が認められない。 △：スポット状またはフィルミング状いずれか一方の融
着が認められる。 ×：スポット状、およびフィルミング状の両方の融着が
認められる。<Fused state> Visual evaluation after suction of the contact surface of the layer regulating member with the developing roller with a vacuum cleaner ○: No fusion of the developer is observed. Δ: Either spot-like or filming-like fusion was observed. ×: Both spot-like and filming-like fusions are observed.
【００３７】＜帯電量＞現像ローラー上の非磁性一成分
現像剤を吸引法にて測定。（東芝ケミカル社製、ブロー
オフ帯電量測定装置 ＴＢ−２００型）のファラデーゲ
ージ取付け部に、現像器のローラ−を接続して現像ロー
ラー上の現像剤を吸引した時のカウンターチャージを測
定し、現像剤の電荷量と、吸引捕修した現像剤重量か
ら、現像剤の比電荷を求めた。当方法では、現像ローラ
ーが周囲のアース部分に近い位置にあると、必ずしも正
確な値が得られない。このため、測定時に誘電体のスペ
ースを介して、アース面から、約２０ｃｍの高さに現像
剤が設置されるように設定した。<Charge Amount> The non-magnetic one-component developer on the developing roller was measured by a suction method. The roller of the developing unit is connected to the Faraday gauge mounting part of the blow-off charge amount measuring device (TB-200, manufactured by Toshiba Chemical Co., Ltd.), and the counter charge when the developer on the developing roller is sucked is measured. The specific charge of the developer was determined from the amount of charge of the developer and the weight of the developer collected by suction. In this method, an accurate value is not always obtained when the developing roller is located at a position close to the surrounding ground portion. For this reason, it was set so that the developer was placed at a height of about 20 cm from the ground plane via a dielectric space during measurement.
【００３８】＜画像濃度＞ソリッド部（３×３ｃｍ）の
画像濃度を反射濃度計（マクベス社製 ＲＤ−９１４）
で測定。<Image Density> The image density of the solid portion (3 × 3 cm) is measured using a reflection densitometer (RD-914, manufactured by Macbeth).
Measured with
【００３９】＜ＰＣカブリ＞感光体の非画像部に透明テ
ープ（住友３Ｍ社製 メンディングテープ）を一旦貼着
し、しかる後剥離したものを未使用のコピー用紙上に貼
り付け、反射濃度計（マクベス社製 ＲＤ−９１４）で
測定。<PC fog> A transparent tape (Mending tape manufactured by Sumitomo 3M) was once adhered to the non-image area of the photoreceptor, and then the peeled one was adhered to an unused copy paper to obtain a reflection densitometer. (Macbeth RD-914).
【００４０】＜飛散＞現像器の現像ローラー周辺部への
現像剤による汚れを目視評価 ○：ほとんど汚れがない。 △：リア、フロント、ミッドのいずれかの位置で、汚れ
が認められる。 ×：リアーフロントの全箇所で、汚れが認められる。<Scattering> Visual evaluation of dirt due to the developer around the developing roller of the developing device ○: Almost no dirt. Δ: Dirt is observed at any of the rear, front, and mid positions. ×: Dirt is observed at all locations on the rear front.
【００４１】[0041]
【表１】 [Table 1]
【００４２】以上の結果から、本発明による非磁性一成
分現像法は、長期使用においても、層規制部材への現像
剤の融着がなく、帯電量が安定した飛散など問題のない
安定した画像特性を有することが確認された。From the above results, it can be seen that the non-magnetic one-component developing method according to the present invention does not cause the fusion of the developer to the layer regulating member even when used for a long time, and has a stable image with no problem such as scattering with a stable charge amount. It was confirmed that it had characteristics.
【００４３】[0043]
【発明の効果】本発明は、上記のように、非磁性一成分
現像剤に特定の無機微粒子を複合的に用い、更には、特
定の硬度を有する層規制部材を用いることで層規制部材
に現像剤の融着がなく良好な現像特性を得ることが可能
となった。According to the present invention, as described above, a specific inorganic fine particle is used in combination with a non-magnetic one-component developer, and further, a layer restricting member having a specific hardness is used to form a layer restricting member. It was possible to obtain good developing characteristics without fusing the developer.
【図１】本発明で用いられる装置の概略説明図。FIG. 1 is a schematic explanatory view of an apparatus used in the present invention.
１ 感光体ドラム ２ ホッパー ３ 非磁性一成分現像剤 ４ 層規制部材 ５ 現像ローラー ６ 漏れ防止及びかき落とし部材 ７ 攪拌機 DESCRIPTION OF SYMBOLS 1 Photoreceptor drum 2 Hopper 3 Non-magnetic one-component developer 4 Layer regulating member 5 Developing roller 6 Leak prevention and scraping member 7 Stirrer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 佐野 昭洋 静岡県静岡市用宗巴町３番１号 株式会 社巴川製紙所 技術研究所内 (72)発明者 黒崎 雅有 静岡県静岡市用宗巴町３番１号 株式会 社巴川製紙所 技術研究所内 (56)参考文献 特開 平５−303233（ＪＰ，Ａ) 特開 平９−197695（ＪＰ，Ａ) 特開 平８−123068（ＪＰ，Ａ) 特開 平６−161226（ＪＰ，Ａ) 特開 平９−288373（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G03G 15/08 G03G 9/08 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akihiro Sano 3-1 Yomoe Tomoecho, Shizuoka City, Shizuoka Prefecture Inside the Technical Research Laboratories of Hamikawa Paper Mill Co., Ltd. No. 3-1 of the town, Tomagawa Paper Mill Technical Research Institute, Inc. (56) References JP-A-5-303233 (JP, A) JP-A-9-197695 (JP, A) JP-A-8-123068 (JP, A A) JP-A-6-161226 (JP, A) JP-A-9-288373 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) G03G 15/08 G03G 9/08
Claims (3)
給し、層規制部材により該非磁性一成分現像剤の薄層を
現像ローラーの表面に形成するとともに、電荷を与え、
感光体ドラムと現像ローラーとの電位差により、該非磁
性一成分現像剤を静電潜像を有する感光体ドラムに現像
し、ついで転写材に転写を行う非磁性一成分現像方法で
あって、前記層規制部材が金属製であり、そのブリネル
硬度が１００〜１６０の範囲であり、かつ、前記非磁性
一成分現像剤が非磁性トナーの表面に、比表面積が８０
ｍ２／ｇ以上の無機微粒子（Ａ）と８０ｍ２／ｇ未満の
無機微粒子（Ｂ）とが複合して付着されていることを特
徴とする非磁性一成分現像方法。1. A non-magnetic one-component developer is supplied to a developing roller, a thin layer of the non-magnetic one-component developer is formed on a surface of the developing roller by a layer regulating member, and a charge is given.
A non-magnetic one-component developing method for developing the non-magnetic one-component developer on a photoconductor drum having an electrostatic latent image by a potential difference between a photoconductor drum and a developing roller, and then transferring the transfer to a transfer material, The regulating member is made of metal, has a Brinell hardness of 100 to 160, and the non-magnetic one-component developer has a specific surface area of 80 on the surface of the non- magnetic toner.
A non-magnetic one-component developing method, wherein inorganic fine particles (A) of m 2 / g or more and inorganic fine particles (B) of less than 80 m 2 / g are combined and adhered.
酸化チタンから選ばれる少なくとも１種類であることを
特徴とする請求項１記載の非磁性一成分現像方法。2. An inorganic fine particle (A) comprising silica, alumina,
2. The non-magnetic one-component developing method according to claim 1, wherein at least one kind is selected from titanium oxide.
０．９５であることを特徴とする請求項１記載の非磁性
一成分現像方法。3. The inorganic fine particle (B) has a roundness of 0.6 to 0.6.
2. The non-magnetic one-component developing method according to claim 1, wherein the value is 0.95.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5859797A JP3073171B2 (en) | 1997-02-27 | 1997-02-27 | Non-magnetic one-component development method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5859797A JP3073171B2 (en) | 1997-02-27 | 1997-02-27 | Non-magnetic one-component development method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10239993A JPH10239993A (en) | 1998-09-11 |
| JP3073171B2 true JP3073171B2 (en) | 2000-08-07 |
Family
ID=13088922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5859797A Expired - Fee Related JP3073171B2 (en) | 1997-02-27 | 1997-02-27 | Non-magnetic one-component development method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3073171B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3883430B2 (en) | 2001-12-14 | 2007-02-21 | 株式会社リコー | Electrophotographic toner external additive, electrophotographic toner, electrophotographic developer, image forming method and image forming apparatus |
| JP5884276B2 (en) * | 2011-03-08 | 2016-03-15 | 富士ゼロックス株式会社 | Toner for developing electrostatic image, toner cartridge, electrostatic image developer, process cartridge, and image forming apparatus |
-
1997
- 1997-02-27 JP JP5859797A patent/JP3073171B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10239993A (en) | 1998-09-11 |
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