JPS58184157A - Developing method of electrostatic image - Google Patents

Abstract

PURPOSE:To obtain a high-quality picture without photographic fog, by combining magnetic carrier particles and toner particles which have particle sizes smaller than conventional these materials and have average particle sizes within specific ranges and setting the gap between surfaces of a developer carrier and an image carrier to a specific value or less. CONSTITUTION:A carrier is used which has an average particle size of 5-30mu smaller than the conventional that and consists of magnetic particles which consist of magnetic materials of metals such as Fe, Ni, and Co or their alloys or oxides or magnetic particles having a specific resistance of >=18<8>OMEGAcm which are obtained by coating these magnetic materials with a styrene resin or the like. Particles which includes or do not include fine magnetic particles and have an average particle size of 1-10mu are used as a toner. It is desirable that <=30wt% fine magnetic particles are included in the toner. A developer 8 where said carrier and toner are combined is used, and the gap between surfaces of a developer carrier 3 having magnets 5 and an image carrier (photsensitive drum) 9 is set to 10-500mu, and development is performed. Thus, a high-density clear picture without photographic fog is obtained on an ordinary paper.

Description

【発明の詳細な説明】 像方法の改良、詳しくは、磁性キャリヤ粒子とトナー粒
子とが混合した現像剤を現像剤搬送担体面に供、給し、
て、該現像剤搬送担体上に現像剤の穂を形成させ、その
穂で像担持体面を摺擦すると、とによって！相持体面の
静電．像を現像する方法、即ち、二成分系の現像剤を用
いた磁気ブラシ現像方法の改良に関する。DETAILED DESCRIPTION OF THE INVENTION Improvements in the imaging method, specifically, supplying and feeding a developer in which magnetic carrier particles and toner particles are mixed onto a developer transporting carrier surface;
Then, spikes of developer are formed on the developer transporting carrier, and the spikes rub the surface of the image carrier. Electrostatic charge on the support surface. This invention relates to an improved method for developing images, ie, a magnetic brush developing method using a two-component developer.

二成分系現像剤を用いた磁，気ブラシ現像方法は、トナ
ー粒子の摩擦帯電制御が比較的容易で、トナー粒子の凝
集が起りに〈く、磁気ブラシの穂立ちがよくて、像担持
体面の摺擦性に優れ、クリー二ン．グとの兼用において
も十分なりリーニング効果が発揮される等の特長を有す
ることから、キャリヤ粒子に対するトナー粒子の量の管
理を必要とするにも拘らず、多く用いられている。そし
て、こ１の現像方法には、従来一般に平均粒径が数十〜
数白μ墓の磁性キャリヤ粒子と平均粒径が十数μｍの非
磁性トナー粒子とからなる現像剤が用いら，れており、
そのようなｍ像剤では、トナー粒子やさらにはキャリヤ
粒子が粗い九めに１繊細な線や点あるいは濃淡差勢を再
現する高画質画像が得られにくいと云った間腫がある。In the magnetic/air brush development method using a two-component developer, triboelectrification control of toner particles is relatively easy, toner particle agglomeration is less likely to occur, the magnetic brush stands up well, and the surface of the image carrier is Has excellent abrasion properties and is easy to clean. Because it has the advantage of exhibiting a sufficient leaning effect even when used in combination with toner particles, it is widely used even though it is necessary to control the amount of toner particles relative to carrier particles. Conventionally, in this first development method, the average particle size was generally several tens to
A developer consisting of magnetic carrier particles with a size of several micrometers and non-magnetic toner particles with an average particle size of more than ten micrometers is used.
With such m-image agents, toner particles and even carrier particles are coarse, making it difficult to obtain high-quality images that reproduce delicate lines, dots, or gradation differences.

即ち、この現像方法において高画質画像を得る丸めに、
従来例えば、キャリヤ粒子の樹脂コーティングとか、現
像剤搬送担体における磁石体の改良とか、現像剤搬送担
体へのバイアス電圧の検討とか、多くの努力が払われて
いるが、それでも未だ安定して十分に満足し得る両像が
得られないのが実情である。したがって、高画質画像を
得るために祉、少くともトナー粒子をできるだけ微゛粒
子とすることが必要であると考えられる。しかし、トナ
ー粒子を平均粒径が７０μｍ以下の微粒子とすると、■
現像時のクーロン力に対してファンデルワールス力の影
響が現われて、像背景の地部分にもトナー粒子が付着す
る所謂かぶりが生ずるようにな、トす、現像剤搬送担体
へのバイアス電圧印加によって屯かぶりを防ぐことが困
難となる、■シナー粒子の摩擦帯電制御が雛しくなって
、凝集が起り品くなる、■しだがつＣ１キャリヤ粒子に
樹脂コーティングを行ってキャリヤ粒子の抵抗変化が少
なくなるようＫしても、安定して鮮明な画像を得ること
ができなくなると云った問題が生じ、そのために、この
ような微粒子トナーは実１１には用いられなかった。In other words, in order to obtain high-quality images using this development method,
Although many efforts have been made in the past, such as resin coating of carrier particles, improvement of magnets in developer transport carriers, and consideration of bias voltage to developer transport carriers, they are still not stable and sufficient. The reality is that it is not possible to obtain a satisfactory image of both. Therefore, in order to obtain high-quality images, it is considered necessary to at least make toner particles as fine as possible. However, if the toner particles are fine particles with an average particle size of 70 μm or less,
The influence of Van der Waals force appears on the Coulomb force during development, and toner particles adhere to the ground area of the image background, causing so-called fog. ■ It becomes difficult to prevent clouding due to the thinner particles. ■ Frictional charging control of the thinner particles becomes difficult and agglomeration occurs, resulting in poor quality. ■ Resistance change of the carrier particles is reduced by applying a resin coating to the C1 carrier particles. Even if the K was reduced, a problem occurred in that a stable and clear image could not be obtained, and for this reason, such fine particle toner was not used in Example 11.

本発明は、平均粒径が１０μｍ以下のトナー粒子を用い
て、しかも上述の如き問題の生ずることのない二成分系
現像剤による磁気ブラシ現像方法を提供するものてあり
、本発明の現像方法は、磁性キャリヤ粒子に平均粒径が
５−ｘｉμ曹のものを用い、トナー粒子に平均粒径が／
　−１０μｍのものを用いると共に、現像剤搬送担体と
像担持体の表面間隙を数１０〜−ｓｏＯｓｍ　Ｋ設定す
ることを特徴とする。The present invention provides a magnetic brush developing method using a two-component developer that uses toner particles having an average particle size of 10 μm or less and does not cause the above-mentioned problems. , the magnetic carrier particles have an average particle size of 5-xiμ carbon, and the toner particles have an average particle size of /
-10 μm is used, and the surface gap between the developer transport carrier and the image carrier is set to several tens to -soOsmK.

ａち、本発明は、磁性キャリヤ粒子に平均粒径が従来の
キャリヤ粒子よりも細かいｊ〜３０＾ｍのものを用いた
ことｋよって、平均粒径が／〜１０１０１ｌのトナー粒
子の摩擦帯電制御を容易にして、凝集＋ｉｂにくくする
と共に、現像剤搬送担体と像担持体の表面間隙を狭める
ことを可能にしており、そして、その表面間隙を数７０
〜ＳＯＯμｍに設定したことによって、現像剤搬送担体
に゛バイアス“電圧を印加し友ときの電界の影響がドナ
ー′粒子に彊〈働いてかぶりの発生が防止され、磁気ブ
ラシの摺擦作用が高くなって、安定″して“１高画質画
像の再現を可能にする・と云う優れ九効釆を奏するもの
である。なお、キャリー子粒子の平場粒径が５μｍより
細か゛くなると、キャリヤ粒子示トナー粒子と共に像担
持体面に付着するようｋなったり、飛散し九りするし、
舅μｍより粗くなると、上述の’ｔｔａきキャリヤ粒子
を細か欠したてとによ−る効果が失われる。そして、現
像剤搬送担体と像桓持体の表面間隙が狭過ぎると、現像
剤゛の穂が′通過しなくなって安定した現像が行われ表
くなるし、ＳＯＯμｍを超えると磁気ブラシの摺擦作用
″が数丁して十分な現像濃度が得ら−れないｊうＫなる
。を九、トナー粒子の平均粒径が／　／Ａｍｌより細か
いと、かぶりの発生を防ぐことが困Ｉｎなって、飛散電
増すようになり、７０μｍを超すと高画質画像を得るこ
とかできなくなる。First, the present invention uses magnetic carrier particles having an average particle size of ~30m smaller than conventional carrier particles.Therefore, the triboelectric charging control of toner particles with an average particle size of ~10,101L is possible. This makes it possible to reduce the agglomeration + ib and narrow the surface gap between the developer transport carrier and the image carrier.
By setting the value to ~SOO μm, a bias voltage is applied to the developer transporting carrier, and the influence of the electric field is applied to the donor particles, preventing fogging and increasing the rubbing action of the magnetic brush. This makes it possible to reproduce high-quality images stably. They may adhere to the surface of the image carrier along with toner particles, or they may scatter and cause damage.
When the grain size becomes coarser than 1 μm, the above-mentioned effect of finely chipped carrier particles is lost. If the surface gap between the developer transport carrier and the image holder is too narrow, the developer spikes will not be able to pass through, resulting in stable development, and if it exceeds SOOμm, the magnetic brush will not be able to slide easily. If the average particle size of the toner particles is smaller than /Aml, it will be difficult to prevent fog from occurring. If the thickness exceeds 70 μm, it becomes impossible to obtain high-quality images.

本発明におけるキャリヤ粒子としては、平均粒径を別に
して、従来の磁性キャリヤ粒子と変らないものを用いる
ことができる。即ち、鉄、クロム、ニッケル、コバルシ
等の金属、あ゛るいはそれらの化合物や合金、例えば、
四三酸化鉄、ｒ−酸化第二鉄、二酸化クロム、酸化マン
ガン、７エライト、マンガン−銅系合金、と云った強磁
性体乃′至は常磁性体の粒子、又は□それらの粒子の表
面をスチレン系樹脂、ビニル果樹−、エチル系樹脂、ロ
ジン変性桐脂、アクリル系棚側゛、ポリアミド樹脂、エ
ポキシ樹脂、ポリエステル樹脂等の樹脂やバルジチンｆ
ａ−ステｔす゛ン酸勢の脂肪酸ワックスで被覆したよう
な絶縁性”の′粒子を用いることができる。As the carrier particles in the present invention, particles that are the same as conventional magnetic carrier particles except for the average particle size can be used. That is, metals such as iron, chromium, nickel, and cobalt, or their compounds and alloys, for example,
Particles of ferromagnetic or paramagnetic substances such as triiron tetroxide, r-ferric oxide, chromium dioxide, manganese oxide, 7-elite, manganese-copper alloy, or the surface of these particles Resins such as styrene resins, vinyl fruit trees, ethyl resins, rosin-modified tung fat, acrylic shelves, polyamide resins, epoxy resins, polyester resins, and vargitin f.
Insulating particles such as those coated with an acidic fatty acid wax can be used.

しかしその甲でも、抵抗率がｌｏ”Ω１以ｊの絶縁性の
磁性粒子が％に好ましい。抵抗率が低いと、現像剤搬送
担体にバイアス電圧を印加した場合に、キャリヤ粒子に
電荷が注入されて、像担持−面にキャリヤ粒子が付着し
易くなると云う問題が生ずる。　　　。However, even on the other hand, insulating magnetic particles with a resistivity of lo''Ω1 or less are preferable.If the resistivity is low, when a bias voltage is applied to the developer transport carrier, charges will be injected into the carrier particles. Therefore, a problem arises in that carrier particles tend to adhere to the image bearing surface.

なお、抵抗率社、粒子を０．！ｔｏｃｓ２の断面積を有
する容器に入れてタッピングした後、詰められた粒子上
にｌに２／１２の荷ｌを掛け、荷重と底面電極との間、
に１０ＯＯＶ／Ｃａｌの電界が生ずる電圧を印加したと
きの電流値を読み取ることで得られる値である。また、
絶縁性粒子は、磁性体粒子の表面に樹脂等の被覆層を設
けたものに限らず、樹脂中に磁性体粒子が分散している
ようなものでもよい。In addition, Resistivity Co., Ltd., particles are 0. ! After tapping in a container with a cross-sectional area of tocs2, a load l of l to 2/12 is applied on the packed particles, and between the load and the bottom electrode,
This value is obtained by reading the current value when a voltage that generates an electric field of 1000V/Cal is applied. Also,
The insulating particles are not limited to those in which a coating layer of resin or the like is provided on the surface of magnetic particles, but may be those in which magnetic particles are dispersed in resin.

以上述べたようなキャリヤ粒子は、従来のキャリヤ粒子
と同様に製造され、従来公知の平均粒径選別手段によっ
て平均粒径を選別されて、本発明に用いられる。The carrier particles as described above are produced in the same manner as conventional carrier particles, and are used in the present invention after being selected for their average particle size by a conventionally known average particle size selection means.

本発明におけるトナー粒子についても、従来の非磁性ま
たは磁性トナー粒子を平均粒径選別手段によって選別し
たようなトナー粒子を用いることができる。そして、ト
ナー粒子が磁性体微粒子を含有した磁性粒子であること
が好ましく、特に磁性体微粒子の置が３０ｗｔ％を超え
ないものが好ましい。トナー粒子が磁性粒子を含んだも
のの場合は、トナー粒子が現像剤搬送担体に含まれる磁
石の磁力の影響を受けるようになるから、磁気ブラシの
摺擦性が一層向上して、しかも、かぶりの発生が防止さ
れ、さらにトナー粒子の飛散も起りにくくなる。しかし
、含有する磁性体の量を多くし−ぎると、キャリヤ粒・
子との間の磁気力が大きくなり過ぎて、十分な現像濃度
を得ることができなくなるし、また、磁性体微粒子がト
ナー粒子の表面に現われるようにもなって、摩擦帯電制
御が銀［７〈なったり、トナー粒子が破損し易くなった
り、キャリヤ粒子との間で凝集し易く食ったりする。As for the toner particles in the present invention, toner particles obtained by sorting conventional non-magnetic or magnetic toner particles by an average particle size sorting means can be used. Preferably, the toner particles are magnetic particles containing fine magnetic particles, particularly those in which the content of fine magnetic particles does not exceed 30 wt%. If the toner particles contain magnetic particles, the toner particles will be influenced by the magnetic force of the magnet included in the developer transport carrier, which will further improve the abrasiveness of the magnetic brush and reduce fogging. This prevents the occurrence of toner particles, and furthermore, scattering of toner particles becomes less likely to occur. However, if the amount of magnetic material contained is too large, carrier particles
The magnetic force between the toner and the toner particles becomes too large, making it impossible to obtain a sufficient developing density.Furthermore, fine magnetic particles appear on the surface of the toner particles, and triboelectric charging control Otherwise, the toner particles may be easily damaged, or they may aggregate easily with the carrier particles.

好ましい、シナ−粒子は、キャリヤ粒子について述べえ
ような磁性体の微粒子と樹脂とを用い、それにカーボン
等の着色成分や必要に応じて帯電制御等を加えて、従来
公知のトナー粒子製造方法と同様の方法によって作るこ
とができる。Preferably, the toner particles are produced using a conventional toner particle production method, using fine particles of a magnetic material and a resin, which can be described as carrier particles, and adding a coloring component such as carbon and, if necessary, charge control. It can be made by a similar method.

本発明における現像剤は、以上述べたようなキャリヤ粒
子・とトナー粒子とが従来の二成分系現像ハ 剤におけると同様の割合で混合したものであるが、それ
には必１１’に応じて粒子の流動滑りをよくするだめの
流動化剤や像担持体面の清浄化に役立つクリーニング剤
勢が混合される。流動化剤としては、コロイダルシリカ
、シリコンフェス、金８１石鹸４るいは非イオン表面活
性剤勢な用いることができ、クリーニング剤としては、
脂肪酸金属塩、有機基置換シリコンあるいは弗素系表面
活性剤等を用いることができる。The developer in the present invention is a mixture of carrier particles and toner particles as described above in the same proportions as in conventional two-component developers, but it is necessary to add particles according to 11'. A fluidizing agent to improve fluidity and sliding and a cleaning agent to clean the surface of the image carrier are mixed. As the fluidizing agent, colloidal silica, silicon face, gold 81 soap 4 or a nonionic surfactant can be used, and as the cleaning agent,
Fatty acid metal salts, organic group-substituted silicones, fluorine-based surfactants, etc. can be used.

以上のような現像剤を用いる本発−の現像方法は図示例
のような装置によって実施される。The developing method of the present invention using the developer as described above is carried out by an apparatus as illustrated.

図において、ｌＦｉ図示せざる帯電および露光装置によ
って表面に静電像を形成される矢印方向に回転する像担
持体、コは現像装置、３は現像剤搬送担体で、矢印方向
に回転するアル１ニウム尋の非磁性材料からなるスリー
ブ参と、スリーブ弘の内部に複数の磁石ｊを配設し九固
定の磁石体≦とから構成されている。７は現像剤ｔの攪
拌装置、９は磁石体６の磁石ｊの磁力によりスリーブ参
の表面に形成される現像剤ｌの穂の量を規制するドクタ
ーブレード、１０はトナー粒子の補給ホッパー、／／は
トナー補給装置である。　　　゛そして、本発明におい
ては、像担持体ｌと現像剤搬送担体３のスリーブ弘との
表面間−をスリーブ参上に形成された現像剤の樋が通過
する範囲の数７０μｍからＳＯＯμｍの範囲に設定する
。なお、スリーブ弘には図示のようにバイアス電圧を印
加するのが好ましい。そこで、先に述べたような、現像
剤ｌは、攪拌装置７勢による攪拌によって十分に摩擦帯
電し、スリーブ参上に槍を形成して、スリーブ弘の回転
と共にその穂がスリーブ参と像担持体ｌとの狭い間隙を
通過することによって、槍による像担持体面の摺擦がな
されて、像担持体面の静電像を現像する。その現像は図
示しない転写装置によって転写材に転写されて、高画質
の記−画像を与える。　　一 本発明を実施する装、置は、上述の例に限らず、スリー
ブ参と磁石体６とが共に回転するものでも、スリーブ参
が固定で磁石体重が同転するものでもよい。また、現像
方向を図示と逆の方向にすることもできる。In the figure, lFi is an image carrier rotating in the direction of the arrow on which an electrostatic image is formed on its surface by a charging and exposure device (not shown), 1 is a developing device, 3 is a developer transport carrier, and Al 1 is rotating in the direction of the arrow. It is composed of a sleeve made of a non-magnetic material with a diameter of 100 mm, and a fixed magnet body with a plurality of magnets disposed inside the sleeve. 7 is a stirring device for the developer t; 9 is a doctor blade that regulates the amount of spikes of the developer l formed on the surface of the sleeve by the magnetic force of the magnet j of the magnet body 6; 10 is a toner particle replenishment hopper; / is a toner supply device. In the present invention, the distance between the surfaces of the image carrier 1 and the sleeve of the developer transport carrier 3 is set to a range of several 70 μm to SOO μm, which is the range through which the developer gutter formed on the sleeve passes. do. Note that it is preferable to apply a bias voltage to the sleeve hole as shown in the figure. Therefore, as mentioned above, the developer l is sufficiently frictionally charged by stirring by the stirring device 7, forms a spear on the sleeve, and as the sleeve rotates, the spear reaches the sleeve and the image carrier. By passing through the narrow gap between the spear and the lance, the spear rubs the surface of the image carrier and develops the electrostatic image on the surface of the image carrier. The developed image is transferred to a transfer material by a transfer device (not shown) to provide a high quality recorded image. The apparatus for carrying out the present invention is not limited to the above-described example, and may be one in which the sleeve and the magnet body 6 rotate together, or one in which the sleeve is fixed and the weight of the magnet rotates at the same time. Further, the developing direction can also be reversed to that shown in the drawings.

次に本発明を実施例で説明する。Next, the present invention will be explained with examples.

実施例ｔ キャリヤ粒子に平均粒径が／ｊ　Ｊｉｉｌ　ｓ抵抗率が
ｌＯΩαの球状フェライト粒子を用い、トナー粒子にス
チレン、アクリル樹脂（三洋化成製へイマーｕｐ　１０
０　）　１００重量部、カーボンブラック（三菱化成製
麗ム一１００　）　１０重量部、ニブ１９２ｊ重量部か
らなる平均粒径がｊμｍの非磁性粒子を用いて、キャリ
ヤ粒子にトナー粒子がｔｏｗｃ％混合したものを現像剤
として、先に述ぺた図示例のような現像装置に用いた。Example t Spherical ferrite particles with an average particle diameter of /JJiils resistivity of lOΩα were used as carrier particles, and styrene and acrylic resin (Heimer up 10 manufactured by Sanyo Chemical Co., Ltd.) were used as toner particles.
0) 100 parts by weight of carbon black (Reimichi 100 manufactured by Mitsubishi Kasei Co., Ltd.), 192 parts by weight of nibs, and non-magnetic particles with an average particle size of 1 μm were used, and toner particles were mixed with carrier particles at 10% by weight. The material was used as a developer in a developing device as shown in the above-mentioned example.

なお、この場合の現像装置は、スリーブ参が矢印方向、
にｔｏｏ　ｒｐｍで回転し、磁石を局方向にＮ。In addition, in the developing device in this case, the sleeve part is in the direction of the arrow,
Rotate at too many rpm and turn the magnet in the direction of the center.

Ｓ交互に設けた磁石体４がスリーブ参と反対方向に／λ
ｏｎ　ｒｐｍで回転するものであり、ＣｄＳ感光体より
なる像担持体／の−には最高電位が−ｓｏｏ　ｖの静電
像が形成されて、像担持体Ｉとスリーブｌとの間隙がＱ
、Ｊｍ、即ち３００μ１１ドクターブレード９とスリー
ブ参との間隙がＯ，コ一に設定され、スリーブ参には一
コｊＯｖのバイアス電圧が印加すれた。S The magnets 4 arranged alternately are in the opposite direction to the sleeve.
It rotates at on rpm, and an electrostatic image with a highest potential of -soo v is formed on the image carrier / no - made of a CdS photoreceptor, and the gap between the image carrier I and the sleeve I is Q.
, Jm, that is, the gap between the 300μ11 doctor blade 9 and the sleeve head was set to O, and a bias voltage of JOv was applied to the sleeve head.

以上の条件で現像を行って、それを普通紙に転写し、表
面温ｆ／４７０℃の熱ローラ定着装置に通して定着した
結果、得られ九記録紙の画像はエツジ効果のない、濃度
の高い、きわめて鮮明なものであった。そして、続いて
ｊ万枚の記録紙を得たが、それらの画像はいずれも最初
のものと変らない鮮明なものであった。The image was developed under the above conditions, transferred to plain paper, and fixed by a heated roller fixing device with a surface temperature of f/470°C. It was high and extremely clear. Subsequently, he obtained 10,000 sheets of recording paper, and each of the images was as clear as the first.

比較例を 現像装置における像担持体ｌとスリーブ参との閲−／、
０＠１ｍとし、ドクターブレード９とスリーブｌとの間
隙を０．７■とじた以外性実施例１と全く同じ条件で現
像、記録を行ったところ、記録紙の画像はエツジ効果が
見られて、濃度の低いものでめり、明らかに実施例１で
得られたものよりも劣ったものであった。Comparative example: View of image carrier l and sleeve part in a developing device.
When developing and recording was carried out under exactly the same conditions as in Example 1, except that the gap between the doctor blade 9 and the sleeve I was 0.7 m, the edge effect was observed in the image on the recording paper. However, it was clearly inferior to that obtained in Example 1, because the concentration was low.

実施例２ スチレン、アクリル樹脂（三洋化成製ハイマーｕｐ　ｉ
ｉｏ　）　ｉｏｏ　１量部と、導電性カーボン（ＡＫＺ
Ｏ社ケツチ＝ンプラ・；り）−重量部と、−性徴粉末（
チタン工業製！ダネタイトＲＢ−ＢＬ平均粒径１μｍ　
）　ｊｏ重量部とを溶融混練し、冷却後、粉砕、分散し
て平均粒径１０μｍの粒子を得た。この粒子をスプレー
ドライ装置に入れ、２００〜２２０℃の温度で熱処理し
、球形化処理を行った。Example 2 Styrene, acrylic resin (Himar up i manufactured by Sanyo Chemical Co., Ltd.
io) 1 part of ioo and conductive carbon (AKZ
Parts by weight of company O's buttchi = npura ;ri) and - sex characteristics powder (
Made by Titanium Industries! Dannetite RB-BL average particle size 1μm
) were melt-kneaded and cooled, then crushed and dispersed to obtain particles with an average particle size of 10 μm. The particles were placed in a spray drying device and heat-treated at a temperature of 200 to 220°C to perform a spheroidization process.

得られたキャリヤ粒子の平均粒径は１０声ｌであり、抵
抗率は１０＠Ω傷であった。The average particle size of the obtained carrier particles was 10 to 1, and the resistivity was 10@Ω flaws.

一方、上述と同じスチレン、アクリル樹脂１００１鰍部
、フェライト微粒子Ｘ重量部、カーボンブラック（三菱
化成製Ｍム一１００　）　１０重量部からなる平均粒径
３μのトナー粒子をつくり、前記キャリア粒子にこのト
ナー粒子をｔａｗｔ％混合して現像剤とし、実施例１と
同様に現像装置に用いて現像、記録を行った。On the other hand, toner particles with an average particle size of 3 μm were prepared from the same styrene as described above, acrylic resin 1001 part, X parts by weight of ferrite fine particles, and 10 parts by weight of carbon black (M Muichi 100 manufactured by Mitsubishi Kasei), and the toner particles were added to the carrier particles. Toner particles were mixed in tawt% to form a developer, and used in the same developing device as in Example 1 to perform development and recording.

なお、この場合の現像装置は、スリーブ参が固定で、磁
石体ｔが７−〇０　ｒｐｗＩで回転するものであり、８
ｅ悪感光よりなる像担持体ｌの面には最高電位が＋７ｊ
ＯＶの静電像が形成されて、像担持体ｌとスリーブ参上
の閤膝が０．ｊ■即ち１００　＃鳳、ドクターブレード
９とスリーブ参との間隙が０．参箇に設定され、スリー
ブ４ＩＫは＋７ｊＯＶのバイアス電圧が印加された。In addition, in the developing device in this case, the sleeve member is fixed and the magnet body t rotates at 7-00 rpwI.
eThe highest potential on the surface of the image carrier l which is exposed to bad light is +7j
An electrostatic image of OV is formed, and the knee of the image carrier l and the sleeve is 0. j ■ That is, 100 #, the gap between the doctor blade 9 and the sleeve 3 is 0. A bias voltage of +7jOV was applied to the sleeve 4IK.

以上の条件によって現像され、普通紙に転写さ第１て、
表面温ＷＩ１４ＩＯ℃の熱ローラを通して定着された記
録画像は、掃き目のない、またかぶりもない、きわめて
鮮明なものであつ九。そして、続いて５万牧の記録紙を
得たが、それらの画像もいずれも最初のものと変らない
鮮明なものであった。The first image is developed under the above conditions and transferred to plain paper.
The recorded image fixed through a heated roller with a surface temperature of WI 14IO°C is extremely clear, with no streaks or fog. Subsequently, I obtained 50,000 yen of recording paper, and the images were all as clear as the first one.

比較例２　　、 キャリヤ粒子の平均粒径が望μｍである以外は実施例２
と全く同じ条件で現像、記録を行ったところ、得られた
記録画像は、エツジ効果は余りないが、掃き目のある４
のであり、明らかに実施例２で得られたものよりも劣つ
九ものであった。Comparative Example 2, Example 2 except that the average particle size of the carrier particles is the desired μm
When developing and recording was carried out under exactly the same conditions as above, the recorded image obtained did not have much edge effect, but it was a 4-color image with a sweeping pattern.
It was clearly inferior to that obtained in Example 2.

【図面の簡単な説明】[Brief explanation of the drawing]

図は本発明の方法を実施する現像装置の一例を不す断面
図である。１ １・・・像担持体、　　　　コ・・・現像装置、３・・
・現像剤搬送担体、　ダ・・・スリーブ、ｊ・・・磁石
１．　　　　　　≦・・・磁石体、７・・・攪拌装置、
　　　　ｔ・・・現像剤、９・・・ドクターブレード、 １０・・・トナー粒子補給ホッパー、 ／ｌ・・・トナー補給装置。 、」′ 工The figure is a cross-sectional view of an example of a developing device for carrying out the method of the present invention. 1 1... Image carrier, K... Developing device, 3...
・Developer transport carrier, da...sleeve, j...magnet 1. ≦... Magnet body, 7... Stirring device,
t...Developer, 9...Doctor blade, 10...Toner particle supply hopper, /l...Toner supply device. ,''

Claims (1)

【特許請求の範囲】 ｔ　磁性キャリヤ粒子とシナ二粒子とが一混合した現像
剤を現像剤搬送担体１１に供給して、該現像剤搬送担体
上に現像剤の、穂を形成させ、その穂で像担持体面を摺
擦、することによって像担持体面の静電像を現像する方
法において、前記磁性キャリヤ粒子に平均粒径がｊ　”
−Ｊｌｆｉ朧のものを用い、トナー粒子に平均粒径がｌ
〜１０μｌのものを用いると共に、前記現像剤搬送担体
と像担持体の表面閏腺な、数７０〜ＳＯＯμ朧に設定す
ることを特徴とする。静電像現像方法。 ２　前記磁性キャリヤ粒子、の抵抗率が１０８ｇ１以上
である特許請求の範Ｉ！館１項記載の静電像現像方法。 五　前記トナー粒子が磁一体を含有している特許請求の
範囲第１項ま九は第２項記載の静電像現像方法。[Scope of Claims] t. A developer containing a mixture of magnetic carrier particles and Chinese particles is supplied to the developer transport carrier 11 to form ears of the developer on the developer transport carrier. In the method of developing an electrostatic image on the surface of an image carrier by rubbing the surface of the image carrier with
- Jlfi oboro is used, and the toner particles have an average particle size of 1
It is characterized in that a liquid having a volume of ~10 μl is used, and the surface density of the developer transporting carrier and image carrier is set to several 70 μl to SOO μl. Electrostatic image development method. 2. Claim I, wherein the magnetic carrier particles have a resistivity of 108g1 or more! The electrostatic image developing method described in Section 1. (5) The electrostatic image developing method according to claim 1 or 2, wherein the toner particles contain a magnetic body.