JPH07140728A - Electrostatic charge image developer - Google Patents
Electrostatic charge image developerInfo
- Publication number
- JPH07140728A JPH07140728A JP5290904A JP29090493A JPH07140728A JP H07140728 A JPH07140728 A JP H07140728A JP 5290904 A JP5290904 A JP 5290904A JP 29090493 A JP29090493 A JP 29090493A JP H07140728 A JPH07140728 A JP H07140728A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- carrier
- charge
- fluorine
- control agent
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電子写真法、静電記録
法、静電印刷法等に用いられる静電荷像現像剤に関し、
さらに詳しくは、キャリアとトナーからなる二成分現像
剤に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatic image developer used in electrophotography, electrostatic recording, electrostatic printing, etc.
More specifically, it relates to a two-component developer comprising a carrier and a toner.
【０００２】[0002]
【従来の技術】一般に、電子写真法においては、光導電
性材料よりなる感光層を有する潜像担持体すなわち感光
体に均一な静電荷を与えた後、画像露光を行うことによ
り当該感光体の表面に静電潜像を形成し、この静電潜像
を現像剤により現像してトナー画像が形成される。得ら
れたトナー画像は紙等の転写材に転写された後、加熱あ
るいは加圧などにより定着されて複写画像が形成され
る。2. Description of the Related Art Generally, in electrophotography, a uniform electrostatic charge is applied to a latent image carrier having a photosensitive layer made of a photoconductive material, that is, a photosensitive member, and then imagewise exposure is performed to expose the photosensitive member. An electrostatic latent image is formed on the surface, and the electrostatic latent image is developed with a developer to form a toner image. The obtained toner image is transferred to a transfer material such as paper and then fixed by heating or pressing to form a copy image.
【０００３】電子写真法等に用いられる二成分現像剤は
トナーとキャリアとにより構成され、トナーとキャリア
とを機械的に撹拌することによってトナーに適正な極性
でかつ適正な量の摩擦帯電電荷を付与する目的で使用さ
れるものである。A two-component developer used in electrophotography or the like is composed of a toner and a carrier, and mechanically agitating the toner and the carrier provides the toner with an appropriate polarity and an appropriate amount of triboelectric charge. It is used for the purpose of giving.
【０００４】また、最近においては、潜像担持体とし
て、安価でしかも安全性の点でセレン系潜像担持体より
も優れている有機光導電性半導体よりなる感光層を具え
た有機潜像担持体が注目されている。有機潜像担持体に
おいて、帯電極性が正とされるものが存在する。しか
し、ほとんどの場合帯電極性は負とされ、現像を行うた
めには、トナーを正に帯電させることが必要となる。Recently, as a latent image bearing member, an organic latent image bearing member having a photosensitive layer made of an organic photoconductive semiconductor, which is superior in price and safety to a selenium-based latent image bearing member, is provided. The body is receiving attention. Some of the organic latent image carriers have a positive charging polarity. However, in most cases, the charging polarity is negative, and it is necessary to positively charge the toner for developing.
【０００５】一方、二成分現像剤に用いられるキャリア
としては、キャリアの耐久性、摩擦帯電性等の向上を図
るため、磁性体粒子の表面を樹脂によりコーティングし
てなるコーティングキャリアが好ましく用いられてい
る。コーティング用樹脂として、特にトナーを正に帯電
させるため、あるいはトナースペントを防止する優れた
特性をもつものとして、フッ素含有樹脂が知られてい
る。On the other hand, as a carrier used for a two-component developer, a coating carrier obtained by coating the surface of magnetic particles with a resin is preferably used in order to improve the durability and triboelectric charging property of the carrier. There is. A fluorine-containing resin is known as a coating resin, particularly for positively charging a toner or as a resin having excellent properties for preventing toner spent.
【０００６】又、最近大きな問題となっているエコロジ
ー対応として総廃棄量の低減策があげられる。現像剤の
総廃棄量の低減のためにはトナーのリサイクルシステム
が有効であり、感光体の耐久性をあげるためには感光体
の表面電位を低電位にすることが有効である。[0006] Further, as an ecological measure that has become a serious problem recently, there is a measure for reducing the total amount of waste. A toner recycling system is effective for reducing the total amount of waste of the developer, and a low surface potential of the photosensitive member is effective for improving the durability of the photosensitive member.
【０００７】これらの改善に関連するものとしてフッ素
含有樹脂を芯材粒子に乾式コーティングして被膜を形成
する技術が特開昭63-235964号公報に提案されている。
しかし、この公報の技術のみでは、感光体の表面電位が
低電位において十分な画像濃度が得られないという問題
点が残っている。感光体の表面電位が低電位のときに十
分な画像濃度を得るためには、キャリアのフッ素含有樹
脂被覆層の薄膜化が有効である。しかし、現像剤が現像
プロセスに供されたとき機械的なストレスを受けるの
で、キャリアが薄膜であると、キャリアが繰り返し使用
に供されてフッ素含有樹脂被覆層が少しでも摩耗する
と、すぐに芯材粒子の表面特性に支配されるようにな
る。トナーの摩擦帯電量が低下し、トナー飛散やかぶり
が発生して十分な耐久性が得られないという問題点があ
る。特に、トナーリサイクルシステムにおいては、転写
されずに残ったトナーがクリーニング部でかき取られ現
像器やホッパーに戻り、繰り返し現像されるため、トナ
ーの表面状態が変化してしまうため、この現象が顕著で
ある。As a technique related to these improvements, Japanese Patent Application Laid-Open No. 63-235964 proposes a technique for forming a coating by coating fluorine-containing resin on core material particles by dry coating.
However, the technique disclosed in this publication still has a problem that sufficient image density cannot be obtained when the surface potential of the photoconductor is low. In order to obtain a sufficient image density when the surface potential of the photoreceptor is low, it is effective to thin the fluorine-containing resin coating layer of the carrier. However, since the developer is subjected to mechanical stress when it is subjected to the development process, if the carrier is a thin film and the fluorine-containing resin coating layer is abraded even if the carrier is repeatedly used, the core material is immediately removed. It comes to be governed by the surface properties of the particles. There is a problem in that the triboelectric charge amount of the toner is reduced, toner scattering and fogging occur, and sufficient durability cannot be obtained. Especially, in the toner recycling system, the toner remaining without being transferred is scraped off by the cleaning section and returned to the developing device or the hopper to be repeatedly developed, so that the surface condition of the toner is changed, and this phenomenon is remarkable. Is.
【０００８】[0008]
【発明が解決しようとする課題】本発明は、以上のごと
き事情に基づいてなされたものであって、その目的は、
優れた耐久性を有し、たとえキャリアのフッ素含有樹脂
被覆層が摩耗しても優れた摩擦帯電安定性を有する、即
ち長期にわたった使用においてもトナー飛散を発生しな
い静電荷像現像剤を提供することにある。The present invention has been made based on the above circumstances, and its purpose is to:
Provided is an electrostatic charge image developer having excellent durability and having excellent triboelectrification stability even if the fluorine-containing resin coating layer of the carrier is worn, that is, toner scattering does not occur even after long-term use. To do.
【０００９】[0009]
【課題を解決するための手段】本発明の課題は、下記手
段によって達成される。The object of the present invention can be achieved by the following means.
【００１０】キャリアとトナーとからなる静電荷像現像
剤であって、キャリアは、芯材粒子の表面にフッ素含有
樹脂を乾式コーティングにより被覆した被覆層を有して
なり、キャリアのフッ素含有樹脂被覆層の膜厚が0.01μ
m〜0.6μmであり、トナーは、少なくともバインダー樹
脂と着色剤と荷電制御剤とを含有してなり、該荷電制御
剤の粉体体積抵抗が108〜1013Ωcmで、且つ荷電制御剤
のトナー中での数平均分散径が0.05〜1.0μmであること
を特徴とする静電荷像現像剤。An electrostatic image developer comprising a carrier and a toner, wherein the carrier has a coating layer in which a fluorine-containing resin is coated on the surface of core material particles by a dry coating, and the carrier is coated with the fluorine-containing resin. Layer thickness is 0.01μ
m to 0.6 μm, the toner contains at least a binder resin, a colorant, and a charge control agent, and the powder volume resistance of the charge control agent is 10 8 to 10 13 Ωcm, and the charge control agent is An electrostatic charge image developer having a number average dispersion diameter in a toner of 0.05 to 1.0 μm.
【００１１】キャリアのフッ素含有樹脂被覆層の膜厚
は、キャリアのフッ素含有樹脂の被覆量（C.R.）より下
記の式によって算出した。The film thickness of the fluorine-containing resin coating layer of the carrier was calculated from the coating amount (CR) of the fluorine-containing resin of the carrier by the following formula.
【００１２】ここにおいてC.R.は、サンプル３ｇを溶媒
中撹拌しフッ素含有樹脂と芯材粒子を分離して得た。CR was obtained by stirring 3 g of the sample in a solvent and separating the fluorine-containing resin and the core material particles.
【００１３】膜厚（μm）＝［(C.R.／100＊ρc／ρs＋
１)1/3−１］＊Ｄ／２ C.R.；キャリアのフッ素含有樹脂の被覆量（重量％） ρc ；芯材粒子の比重（ｇ／cm3） ρs ；フッ素含有樹脂の比重（ｇ／cm3） Ｄ ；芯材粒子の直径（μm） キャリアの乾式コ−ティング方法は、芯材粒子と被覆用
樹脂粒子とを混合して、双方の静電摩擦力を利用して芯
材粒子の表面上に被覆用樹脂粒子を静電的に付着させた
後、この状態の混合物に機械的衝撃力または熱あるいは
両方を同時に加えて芯材粒子の表面上に被覆用樹脂粒子
を固着し樹脂被覆層を形成するものである。Film thickness (μm) = [(CR / 100 * ρc / ρs +
1) 1/3 -1] * D / 2 CR; Fluorine-containing resin coverage of carrier (wt%) ρc; Specific gravity of core material particles (g / cm 3 ) ρs; Specific gravity of fluorine-containing resin (g / cm 3 ) D: Diameter of core material particles (μm) The dry coating method of the carrier is performed by mixing the core material particles and the coating resin particles, and utilizing the electrostatic frictional force of both, to the surface of the core material particles. After electrostatically adhering the coating resin particles on the top, mechanical impact force or heat or both are simultaneously applied to the mixture in this state to fix the coating resin particles on the surface of the core material particles to form a resin coating layer. Is formed.
【００１４】荷電制御剤の粉体体積抵抗は、温度20℃、
相対湿度65％の環境条件下においてサンプル１ｇを断面
積１cm2の円筒の入れ物に入れ、500ｇ加圧した状態で50
0Ｖの電圧をかけ30秒後に抵抗値を得た。The powder volume resistance of the charge control agent is 20 ° C.
Under the environmental conditions of relative humidity of 65%, put 1g of sample into a cylindrical container with a cross-sectional area of 1cm 2 and press 50g under pressure of 50g.
A voltage of 0 V was applied and a resistance value was obtained after 30 seconds.
【００１５】荷電制御剤のトナー中の平均分散径は、透
過型電子顕微鏡写真により観察し、測定した。The average dispersion diameter of the charge control agent in the toner was observed and measured by a transmission electron microscope photograph.
【００１６】トナーの摩擦帯電量は「電荷の発生」と
「電荷の漏洩」とのバランスで決定する。キャリアのフ
ッ素含有樹脂被覆層が摩耗してもトナーの摩擦帯電量が
低下しないようにするためには「電荷の漏洩」を抑える
ことと「電荷の発生」を増やすことが必要となる。前者
を達成するためにはトナーの時定数を小さくしなければ
ならず、後者を達成するためにはトナーとキャリアの仕
事関数の差を大きくしなければならない。トナーに荷電
制御剤を添加することによってこの両者の効果が得ら
れ、キャリアのフッ素含有樹脂被覆層の摩耗に伴うトナ
ーの摩擦帯電量の低下の防止に有効である。The triboelectric charge amount of the toner is determined by the balance between "charge generation" and "charge leakage". In order to prevent the triboelectric charge amount of the toner from decreasing even when the fluorine-containing resin coating layer of the carrier is worn, it is necessary to suppress "leakage of charges" and increase "generation of charges". In order to achieve the former, the time constant of the toner must be reduced, and in order to achieve the latter, the difference between the work functions of the toner and the carrier must be increased. By adding a charge control agent to the toner, both effects are obtained, and it is effective in preventing a decrease in the triboelectric charge amount of the toner due to abrasion of the fluorine-containing resin coating layer of the carrier.
【００１７】[0017]
【作用】トナーのバインダー樹脂としては、ポリエステ
ル樹脂、スチレン系樹脂、アクリル系樹脂、スチレン−
アクリル系共重合体樹脂、エポキシ樹脂等が用いられ
る。トナーを構成する着色剤としては、カーボンブラッ
ク、ニグロシン染料、アニリンブルー、カルコオイルブ
ルー、クロムイエロー、ウルトラマリンブルー、デュポ
ンオイルレッド、キノリンイエロー、メチレンブルーク
ロライド、フタロシアニンブルー、マラカイトグリーン
オクサレート、ランプブラック、ローズベンガル等が用
いられる。荷電制御剤としては、モリブデン酸の４級ア
ンモニウム塩、ニグロシンの含金属染料等が用いられ
る。トナー中には、必要に応じてその他の添加剤が含有
されても良い。かかるその他の添加剤としては、定着性
改良剤等が挙げられ、定着性改良剤としては、例えば、
低分子量ポリプロピレン等が用いられる。[Function] As the binder resin of the toner, polyester resin, styrene resin, acrylic resin, styrene-
Acrylic copolymer resin, epoxy resin, etc. are used. As the colorant constituting the toner, carbon black, nigrosine dye, aniline blue, chalco oil blue, chrome yellow, ultramarine blue, DuPont oil red, quinoline yellow, methylene blue chloride, phthalocyanine blue, malachite green oxalate, lamp black, Rose bengal or the like is used. As the charge control agent, a quaternary ammonium salt of molybdic acid, a nigrosine metal-containing dye, or the like is used. The toner may contain other additives as required. Examples of such other additives include fixability improving agents, and the fixability improving agents include, for example,
Low molecular weight polypropylene or the like is used.
【００１８】荷電制御剤の粉体体積抵抗は108〜1013Ωc
mが好ましい。トナーの時定数を小さくするには低抵抗
な荷電制御剤を添加してトナーの粉体体積抵抗を小さく
することが好ましいが、荷電制御剤の粉体体積抵抗が10
8Ωcm以下であるとトナーの粉体体積抵抗が低くなりす
ぎ、これに伴ってトナーの摩擦帯電量の絶対レベルが低
下しトナー飛散やかぶりの問題が発生する。反対に、荷
電制御剤の粉体体積抵抗が1013Ωcm以上であると、トナ
ーの時定数を小さくする効果が現れず、従って、キャリ
アのフッ素含有樹脂層の摩耗に伴うトナーの摩擦帯電量
の低下を防止できない。荷電制御剤自体の構造について
は特に特定されるものではなく、抵抗値が上記範囲に存
在ものであれば全て使用することができる。具体的には
アゾ系クロム錯体、４級アンモニウム塩化合物、ニグロ
シン染料、トリフェニルメタン誘導体があげられるが、
特にトリフェニルメタン誘導体が好適である。The powder volume resistance of the charge control agent is 10 8 to 10 13 Ωc
m is preferred. To reduce the time constant of the toner, it is preferable to add a low resistance charge control agent to reduce the powder volume resistance of the toner.
If it is 8 Ωcm or less, the powder volume resistance of the toner becomes too low, and along with this, the absolute level of the triboelectric charge amount of the toner decreases, and problems of toner scattering and fogging occur. On the other hand, if the powder volume resistance of the charge control agent is 10 13 Ωcm or more, the effect of reducing the time constant of the toner does not appear, and therefore, the triboelectric charge amount of the toner due to wear of the fluorine-containing resin layer of the carrier It cannot prevent a drop. The structure of the charge control agent itself is not particularly specified, and any structure having a resistance value within the above range can be used. Specific examples include azo chromium complex, quaternary ammonium salt compound, nigrosine dye, and triphenylmethane derivative.
A triphenylmethane derivative is particularly preferable.
【００１９】荷電制御剤のトナー中の平均分散径は0.05
〜1.0μmであることが好ましい。The average dispersion diameter of the charge control agent in the toner is 0.05.
It is preferably ˜1.0 μm.
【００２０】荷電制御剤のトナー中の分散径が0.05μm
以下であるとその効果が発揮されない。Dispersion diameter of the charge control agent in the toner is 0.05 μm
The effect will not be exhibited if it is below.
【００２１】また、荷電制御剤のトナー中の分散径が1.
0μm以上であると、トナー全体の表面に均一に荷電制御
剤が行き渡らず、トナーの帯電量分布が広がって、トナ
ー飛散やかぶりの問題が発生する。The dispersion diameter of the charge control agent in the toner is 1.
When it is 0 μm or more, the charge control agent is not evenly distributed on the entire surface of the toner, and the distribution of the charge amount of the toner is widened to cause problems of toner scattering and fogging.
【００２２】キャリアのフッ素含有樹脂の材料として
は、以下の如き例示物質を用いることができる。これら
は組み合わせて用いても良い。The following exemplified substances can be used as the material of the fluorine-containing resin of the carrier. These may be used in combination.
【００２３】[0023]
【化１】 [Chemical 1]
【００２４】[0024]
【化２】 [Chemical 2]
【００２５】[0025]
【化３】 [Chemical 3]
【００２６】キャリアの芯材粒子としては、特に限定さ
れず、公知の芯材粒子を用いることができる。具体的に
は、フェライト、マグネタイト等の磁性体粒子を好まし
く用いることができる。また、キャリアの芯材粒子の粒
径は、20〜200μmが好ましく、特に40〜120μmが好まし
い。The core particles of the carrier are not particularly limited, and known core particles can be used. Specifically, magnetic particles such as ferrite and magnetite can be preferably used. Further, the particle diameter of the core material particles of the carrier is preferably 20 to 200 μm, and particularly preferably 40 to 120 μm.
【００２７】[0027]
【実施例】以下、本発明の実施例を比較例と共に説明す
るが、本発明がこれらの実施例に限定されるものではな
い。なお、以下において、「部」は「重量部」を表す。EXAMPLES Examples of the present invention will be described below together with comparative examples, but the present invention is not limited to these examples. In the following, "part" means "part by weight".
【００２８】（キャリアの製造）後記表１に示す組み合
わせの芯材粒子とフッ素含有樹脂粒子を特願平5-124273
号に記載の乾式処理装置に投入し回転翼の周速を８ｍ／
秒に設定し、常温下において10分間にわたり混合撹拌し
た。次いで、当該装置の混合撹拌槽を85〜90℃まで加温
してさらに20分間にわたり混合撹拌を行った。次に、回
転翼の周速を４ｍ／秒に設定し、常温下で10分間混合撹
拌し材料を冷却し、フッ素含有樹脂被覆層を有するキャ
リアを得た。(Manufacture of Carrier) The core material particles and the fluorine-containing resin particles in the combination shown in Table 1 below are used in Japanese Patent Application No. 5-124273.
No. 8 in the dry treatment equipment described in No.
Seconds, and mixed and stirred at room temperature for 10 minutes. Then, the mixing and stirring tank of the apparatus was heated to 85 to 90 ° C., and the mixing and stirring was further performed for 20 minutes. Next, the peripheral speed of the rotary blade was set to 4 m / sec, and the materials were cooled by mixing and stirring for 10 minutes at room temperature to obtain a carrier having a fluorine-containing resin coating layer.
【００２９】[0029]
【表１】 [Table 1]
【００３０】（トナーの製造）トナーを構成する樹脂
と、着色剤と、荷電制御剤と、その他必要に応じて用い
られる添加剤とを混合し、溶融混練し、冷却後粉砕し、
分級して所望の平均粒径のトナーを得た。なおここでＡ
は、トリフェニルメタン誘導体のスルフォン酸塩であ
り、Ｂはニグロシン染料であり、Ｃはグアニジン誘導体
である。(Manufacture of Toner) A resin constituting a toner, a colorant, a charge control agent, and other additives optionally used are mixed, melt-kneaded, cooled and pulverized,
By classification, a toner having a desired average particle diameter was obtained. Here, A
Is a sulfonate of a triphenylmethane derivative, B is a nigrosine dye, and C is a guanidine derivative.
【００３１】[0031]
【表２】 [Table 2]
【００３２】（現像剤の調整）本発明のキャリアＣ１〜
Ｃ３及びトナーＴ１〜Ｔ６を表３に示す組み合わせによ
りトナー濃度５％で調製した。(Preparation of developer) Carrier C1 of the present invention
C3 and toners T1 to T6 were prepared with the combination shown in Table 3 at a toner concentration of 5%.
【００３３】[0033]
【表３】 [Table 3]
【００３４】（耐久性の評価）上記現像剤Ｄ１〜Ｄ18を
それぞれ用いて、有機潜像担持体を有しリサイクル方式
を搭載しているU-BIX1112（コニカ(株)社製）の改造機
を感光体の表面電位−580Ｖに調整した。温度20℃、相
対湿度65％の環境条件下において複写画像を形成する実
写テストを行い、トナーの摩擦帯電量、トナー飛散、か
ぶりについて評価した。帯電量は、公知のブローオフ法
により測定し、トナー飛散は、評価機の内側に白いテー
プをはり、目視により機内のトナー飛散状況を観察し
た。評価は、良好である場合を「○」、若干不良である
が実用レベルにある場合を「△」、不良で実用的には問
題のある場合を「×」とした。かぶりについては、「サ
クラデンシトメーター」（コニカ(株)社製）により、原
稿の白地部分（反射濃度0.0）に対応する複写画像の白
地部分の相対濃度を測定し、相対湿度が0.01未満の場合
を「○」、0.01以上0.02未満の場合を「△」、0.02以上
の場合を「×」とした。結果を後記表４に示す。(Evaluation of Durability) A modified machine of U-BIX1112 (manufactured by Konica Corp.) having an organic latent image carrier and a recycle system is mounted using each of the developers D1 to D18. The surface potential of the photoconductor was adjusted to -580V. An actual copying test was conducted to form a copied image under the environmental conditions of a temperature of 20 ° C. and a relative humidity of 65%, and the triboelectric charge amount of the toner, the toner scattering, and the fogging were evaluated. The charge amount was measured by a known blow-off method, and the toner scattering was observed by visually observing the toner scattering condition inside the machine by putting a white tape inside the evaluation machine. The evaluation was "Good" when it was good, "Fair" when it was a little bad but at a practical level, and "Poor" when it was bad and practically problematic. Regarding fogging, the relative density of the white background portion of the copy image corresponding to the white background portion (reflection density 0.0) of the original was measured with a "Sakura Densitometer" (manufactured by Konica Corporation), and the relative humidity was less than 0.01. The case was designated as “◯”, the case of 0.01 or more and less than 0.02 was designated as “△”, and the case of 0.02 or more was designated as “x”. The results are shown in Table 4 below.
【００３５】[0035]
【表４】 [Table 4]
【００３６】以上の実施例の結果からも理解されるよう
に、本発明のＤ１〜Ｄ２、Ｄ７〜Ｄ８、Ｄ13〜Ｄ14によ
れば、トナーリサイクルシステムを搭載した複写機にお
いて、キャリアの被覆層が摩耗しても帯電量の低下を抑
制でき、また、スペントしたキャリアに対する帯電安定
性が得られるため、高現像性かつ高耐久性を有する現像
剤を提供する事ができる。As can be understood from the results of the above examples, according to D1 to D2, D7 to D8, and D13 to D14 of the present invention, in the copying machine equipped with the toner recycling system, the coating layer of the carrier is It is possible to provide a developer having high developability and high durability because it is possible to suppress a decrease in the amount of charge even when worn, and to obtain charge stability with respect to a spent carrier.
【００３７】[0037]
【発明の効果】本発明により、キャリアのフッ素含有樹
脂被覆層が摩耗しても、優れた摩擦帯電安定性と優れた
耐久性を有する高現像性かつ高耐久性静電荷像現像剤を
提供することができる。According to the present invention, there is provided a highly developable and highly durable electrostatic image developer having excellent triboelectrification stability and excellent durability even when the fluorine-containing resin coating layer of the carrier is worn. be able to.
【００３８】キャリアの被覆層が摩耗しても帯電量の低
下を抑制でき、スペントしたキャリアに対する帯電安定
性が得られるため、トナーリサイクルシステムを搭載し
た複写機に適する。Even if the coating layer of the carrier is worn, a decrease in the amount of charge can be suppressed, and charging stability for the spent carrier can be obtained, so that it is suitable for a copying machine equipped with a toner recycling system.
Claims (1)
像剤であって、キャリアは、芯材粒子の表面にフッ素含
有樹脂を乾式コーティングにより被覆した被覆層を有し
てなり、キャリアのフッ素含有樹脂被覆層の膜厚が0.01
〜0.6μmであり、トナーは、少なくともバインダー樹脂
と着色剤と荷電制御剤とを含有してなり、該荷電制御剤
の粉体体積抵抗が108〜1013Ωcmで、且つ荷電制御剤の
トナー中での数平均分散径が0.05〜1.0μmであることを
特徴とする静電荷像現像剤。1. An electrostatic charge image developer comprising a carrier and a toner, wherein the carrier has a coating layer in which a fluorine-containing resin is coated on the surface of core material particles by a dry coating, and the carrier contains fluorine. The thickness of the resin coating layer is 0.01
To 0.6 μm, the toner contains at least a binder resin, a colorant, and a charge control agent, and the powder volume resistance of the charge control agent is 10 8 to 10 13 Ωcm, and the toner of the charge control agent is An electrostatic charge image developer having a number average dispersion diameter of 0.05 to 1.0 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29090493A JP3259069B2 (en) | 1993-11-19 | 1993-11-19 | Electrostatic image developer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29090493A JP3259069B2 (en) | 1993-11-19 | 1993-11-19 | Electrostatic image developer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07140728A true JPH07140728A (en) | 1995-06-02 |
| JP3259069B2 JP3259069B2 (en) | 2002-02-18 |
Family
ID=17762018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29090493A Expired - Fee Related JP3259069B2 (en) | 1993-11-19 | 1993-11-19 | Electrostatic image developer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3259069B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009042257A (en) * | 2007-08-06 | 2009-02-26 | Ricoh Co Ltd | Single-component development device, process cartridge, and method of manufacturing single-component developing toner |
| JP2011059519A (en) * | 2009-09-11 | 2011-03-24 | Fuji Xerox Co Ltd | Carrier, electrostatic charge image developer, developer cartridge, process cartridge and image forming apparatus |
-
1993
- 1993-11-19 JP JP29090493A patent/JP3259069B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009042257A (en) * | 2007-08-06 | 2009-02-26 | Ricoh Co Ltd | Single-component development device, process cartridge, and method of manufacturing single-component developing toner |
| JP2011059519A (en) * | 2009-09-11 | 2011-03-24 | Fuji Xerox Co Ltd | Carrier, electrostatic charge image developer, developer cartridge, process cartridge and image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3259069B2 (en) | 2002-02-18 |
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