JPS59102252A - Toner for electrostatic charged image development - Google Patents

Toner for electrostatic charged image development

Info

Publication number
JPS59102252A
JPS59102252A JP57212738A JP21273882A JPS59102252A JP S59102252 A JPS59102252 A JP S59102252A JP 57212738 A JP57212738 A JP 57212738A JP 21273882 A JP21273882 A JP 21273882A JP S59102252 A JPS59102252 A JP S59102252A
Authority
JP
Japan
Prior art keywords
toner
toner powder
particles
powder
particle diameter
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
JP57212738A
Other languages
Japanese (ja)
Inventor
Tsuneo Daidouji
大導寺 恒雄
Kenji Tsujita
辻田 賢治
Masahiko Itaya
正彦 板谷
Kenichi Kuzumi
来住 賢一
Ryuhei Kasuya
粕谷 隆平
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP57212738A priority Critical patent/JPS59102252A/en
Publication of JPS59102252A publication Critical patent/JPS59102252A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00Developers
    • G03G9/08Developers with toner particles
    • G03G9/0819Developers with toner particles characterised by the dimensions of the particles

Abstract

PURPOSE:To improve fluidity and to execute a good development by using a mixture of the first toner powder consisting of spherical particles, and the second toner powder consisting of amorphous particles having mean maximum width being smaller than a mean particle diameter of the first toner powder. CONSTITUTION:An electrostatic charge developing toner is obtained by mixing the first toner powder consisting of spherical particles whose mean particle diameter is about 10-30mum, and the second toner powder which has mean maximum width of about 5-15mum and of amrophous particles being smaller than a mean particle diameter of the first toner powder. By using a toner of such a constitution, fluidity as the whole toner is improved since particles of the first toner powder is spherical, a suitable charge is obtained by stirring, and the development becomes good. Also, as for the second toner powder, its mean maximum width is smaller than the mean particle diameter of the first toner, therefore, sharpness and resolution of a visible picture become good.

Description

【発明の詳細な説明】 本発明は、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荷像ン現像するためのトナーに関す
るものでわる。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a toner for developing electrostatic images formed in electrophotography, electrostatic printing, electrostatic recording, and the like.

静電荷像の現像は、帯電せしめ定トナー粒子ンW’f’
電引カケ利用して静電荷像叉待体の表面に静電荷像に従
って何着させ、これによって可視化するプロセスである
Development of an electrostatic charge image is carried out using charged toner particles W'f'
This is a process in which an electrostatic charge image is deposited on the surface of an electrostatic charge image holding body using an electric knife, and is thereby visualized.

斯刀・る静電荷像の現像には乾式現像法ン利用すること
が好ましく、この乾式現像法に2いては、トナーとキャ
リアとが混合でれて成るいわゆる二成分系現像剤または
磁性体娶含有する磁性トナーより成りキャリアと混合き
れずに単独で用いられるいわゆる一成分系現像剤とがあ
る。
It is preferable to use a dry developing method to develop an electrostatically charged image, and in this dry developing method, a so-called two-component developer consisting of a mixture of toner and carrier or a magnetic material mixture is used. There is a so-called one-component developer which is composed of a magnetic toner and is used alone without being completely mixed with a carrier.

このような現像剤のトナーは通常10〜30μ程度の粒
径のものとされるが、鮮鋭性及び解像性の優れた可視画
成ン形成させるためには、トナーの粒径2小さくするこ
とが必要である。しかしながら、トナーの粒径は他の特
性に対しても重大な関係を有し、自由に選定し得るもの
ではない。
The toner used in such a developer usually has a particle size of about 10 to 30μ, but in order to form a visible image with excellent sharpness and resolution, the particle size of the toner should be reduced by 2. is necessary. However, the toner particle size has a significant relationship with other properties and cannot be selected freely.

例えば磁性トナーにおいては、現像乞良好に行なうため
にはそれ自体が優れた流動性ぞ有することが必要であジ
、このためにトナー粒子ン球形のものとすることが行な
われる。この球形化は、例えば不定形のトナー粒子ン熱
風により処理する方法等によってなされるが、粒径が小
さくなるほど凝集、融着等の大径粒子化が生ずるように
なるため、所望の小径の球形粒子のトナーは非常に収率
が低く、実用上、平均粒子径が10μ以下の球形粒子よ
り成るトナー7得ることは困難である。
For example, magnetic toner needs to have excellent fluidity in order to perform good development, and for this reason, toner particles are formed into spherical shapes. This spheroidization is achieved, for example, by a method of treating irregularly shaped toner particles with hot air, but as the particle size becomes smaller, particles with larger diameters such as agglomeration and fusion will occur. The yield of particle toner is very low, and in practice, it is difficult to obtain toner 7 consisting of spherical particles with an average particle diameter of 10 μm or less.

また、以上の点?別としても、平均粒径が10μ以下で
球形の粒子より成るトナー7用いた場合には、静電荷像
支持体のクリーニングが不十分となる欠点がある。これ
は、静電荷像支持体に何着したトナーで転写紙に転写て
れなかった残留トナーは例えばゴムブレード等により静
電荷像支持体の表面より除去する必要がちるにもかかわ
らず、それが不十分となること乞意味し、結局良好な可
視画像の形成ン行なうことができないこととなる。
Also, the above points? Apart from this, when toner 7 consisting of spherical particles with an average particle diameter of 10 μm or less is used, there is a drawback that cleaning of the electrostatic image support is insufficient. This is despite the fact that residual toner that has not been transferred to the transfer paper is removed from the surface of the electrostatic image support using a rubber blade, for example. This means that it will be insufficient and, as a result, it will not be possible to form a good visible image.

一方、球形でないいわゆる不定形の粒子より成るトナー
は、その粒径、具体的には平均最大幅の値乞小でくする
と、流動性が得られな(なるので良好な現像を行なうこ
とができない。
On the other hand, toner consisting of irregularly shaped particles that are not spherical cannot have fluidity (and therefore cannot perform good development) if the particle size, specifically the average maximum width, is too small. .

本発明は以上の如さ事情に基いてなされたものであって
、その目的は、良好な流動性ン有してい解像性の高い可
視画像の形成が容易であり、また静電荷像支持体のクリ
ー二/グを十分に行なうことができ、更に製造も容易な
静電荷像現像用トナー馨提供するにある。
The present invention has been made based on the above-mentioned circumstances, and its object is to easily form a visible image with good fluidity and high resolution, and to provide an electrostatic image support. An object of the present invention is to provide a toner for developing electrostatic images that can be sufficiently cleaned and cleaned and is also easy to manufacture.

以上の目的は、球形粒子よジ成る第1のトナー粉末と、
この第1のトナー粉末の平均粒径より小さい平均最大幅
ン有する不定形粒子より成る第2のトナー粉末との混合
体より成ること乞特徴とする静電荷像現像用トナーによ
って達成される。
The above object is to provide a first toner powder consisting of spherical particles;
This is achieved by a toner for developing an electrostatic image, characterized in that it is comprised of a mixture with a second toner powder consisting of irregularly shaped particles having an average maximum width smaller than the average particle diameter of the first toner powder.

以下本発明乞具体的に説明する。The present invention will be explained in detail below.

本発明にJdいては、平均粒径がlO〜30μの球形粒
子より成る第1のトナー粉末と、平均最大幅が5〜15
μであってしかも第1のトナー粉末の平均粒径よジ小さ
い不定形粒子より成る第2のトナー粉末と乞、重量で9
:l〜工:9の範囲で混合して静電荷像支持体トナーと
する。
In the present invention, Jd includes a first toner powder consisting of spherical particles having an average particle size of 10 to 30μ, and an average maximum width of 5 to 15μ.
The second toner powder is composed of amorphous particles having a particle diameter of μ and smaller than the average particle diameter of the first toner powder.
A toner for an electrostatic image support is prepared by mixing in the range of :l to :9.

以上に2いて、第1のトナー粉末及び第2のトナー粉末
は、何れもバインダー中に着色剤、磁性体、その他のト
ナー成分が含有された粒子よジ成るものである。そして
第1のトナー粉末は、不定形のトナー粒子ン飛散芒せて
熱風ン作用せしめる球形化処理?施すことにより、或い
はトナー成分ン分散混合した樹脂溶液ン噴霧乾燥させる
スグンードライ法若しくはトナー成分を分散混合した単
量体より成る重合組成物馨懸濁重合せしめる造粒重合法
により、製造することができる。また第2のトナー粉末
は、バインダー樹脂中にトナー成分を添加し、加熱して
溶融練肉し、冷却後粉砕し分級する通常のトナーの製造
方法によって製造することができる。
In 2 above, both the first toner powder and the second toner powder are particles containing a colorant, a magnetic substance, and other toner components in a binder. The first toner powder is subjected to a spheroidization process in which irregularly shaped toner particles are scattered and exposed to hot air. Alternatively, the toner components can be produced by spray-drying a resin solution in which the toner components are dispersed and mixed, or by a granulation polymerization method in which a polymer composition made of monomers in which the toner components are dispersed and mixed is subjected to suspension polymerization. . The second toner powder can be manufactured by a normal toner manufacturing method in which toner components are added to a binder resin, heated to melt and knead, cooled, and then crushed and classified.

第2のトナー粉末についての平均最大幅とは、球形粒子
の平均粒径に対応する概念であって、不定形粒子の各々
に8ける最大幅の平均値であって。
The average maximum width of the second toner powder is a concept corresponding to the average particle diameter of the spherical particles, and is the average value of the maximum widths of each of the irregularly shaped particles.

ここでは、第1のトナー粉末についての平均粒径も含め
て、コールクーカウンターによって得られる値乞いう。
Here, the average particle size of the first toner powder is also included, and the price obtained by the Coulcoo counter is included.

本発明トナーによれば、第1のトナー粉末の粒子は球形
であるのでトナー全体として良好な流動性ン得ることが
可能であり、これによって攪拌によジpJr要の帯電状
態が得られて良好な現像乞達成することができる。
According to the toner of the present invention, since the particles of the first toner powder are spherical, it is possible to obtain good fluidity as a whole of the toner, and as a result, a good charging state can be obtained by stirring. It is possible to achieve the desired development results.

マli第2のトナー粉末の平均最大幅は第1のトナー粉
末の平均粒径よジ小さいので、第1のトナー粉末のみの
トナーに比して、得られる可視画像の鮮鋭性及び解像性
が大さく向上する。特に、他の効果を減殺することなく
、当該第2のトナー粉末の平均最大幅?10μ以下例え
ば5μとすることができるので、R細な可視画像の形成
が可能となる。
Because the average maximum width of the second toner powder is smaller than the average particle size of the first toner powder, the sharpness and resolution of the resulting visible image is improved compared to a toner with only the first toner powder. is greatly improved. In particular, without diminishing other effects, the average maximum width of the second toner powder? Since the thickness can be set to 10μ or less, for example, 5μ, it is possible to form a visible image with R-fineness.

これは、現像においては、小さなトナー粒子が優先的に
静電荷像支持体に吸引されて行(がらである。
This is because during development, small toner particles are preferentially attracted to the electrostatic image support.

以上のように、第1のトナー粉末及び第2のトナー粉末
が共に存在することにより、第1のトナー粉末の平均粒
径とは無関係に良好な現像が行なわれるので、当該第1
のトナー粉末の平均粒径ン積極的に小さくすることは必
要とされず、従って静電荷像支持体のり17’ニモ ができ、その製造も容易である。
As described above, by the presence of both the first toner powder and the second toner powder, good development is performed regardless of the average particle size of the first toner powder.
It is not necessary to aggressively reduce the average particle size of the toner powder, and therefore the electrostatic image support paste 17' is easy to manufacture.

な左、第2のトナー粉末は、その平均最大幅か小さくて
も、不定形粒子であるために静電荷像支持体のりIJ−
ニングが不十分となることはなく、また七の製造も答易
である。
On the left, even if the average maximum width is small, the second toner powder is irregularly shaped particles, so it does not adhere to the electrostatic image support IJ-
There is no shortage of coatings, and the production of 7 is easy.

以上のように、トナーとしての流動性ン確保しながら他
の効果が同時に得られることから、キャリアが混合され
ないためにキャリアによっては流動性ケ改善することが
できない磁性トナーにj6いて、上述の効果は大きな意
義ン宵する。勿論、二成分系現f′、J:剤のトナーと
して用いたときにも同様の効果が得られる。
As described above, other effects can be obtained while ensuring the fluidity of the toner. Therefore, the above-mentioned effects can be achieved with magnetic toners whose fluidity cannot be improved depending on the carrier because the carrier is not mixed with the toner. is of great significance tonight. Of course, similar effects can be obtained when used as a toner for a two-component developer f', J:.

第1のトナー粉末と第2のトナー粉末と1ri、粒子の
形態以外の点については同一の特性ン有することが好ま
しく、従ってバインダー及びトナー成分の8’d+、類
若しくけ組成等は同じものと式れるのが好ましい。
It is preferable that the first toner powder and the second toner powder have the same characteristics except for the particle shape, so that the binder and toner components have the same composition. It is preferable that it can be expressed as

バインダーとしては、従来から用いられているものをそ
のまま使用することができるが、熱可塑性4’iH脂で
あることが望ましい。具体的には、ポリスチレン、ポリ
ビニルトルエン、スチレン−ブタジェン共重合体、スチ
レン−アクリル酸エステル共重合体、スチレン−無水マ
ンイン酸共重合体などのステV/若しくはその置換体に
よる重合体または共重合体、ポリエステル樹脂、アクリ
ル系樹脂、キシレノ樹脂、ポリアミド樹脂、アイオノマ
ー樹脂、ケトンtlJ脂、テルペン樹脂、フェノール変
性テルペン樹脂、ロジノ、ロジン変性樹脂、マレイン酸
変性フェノール樹脂、石油系樹脂、澱粉グラフト重合体
、ポリビニルアルコール、ポリビニルビ017ドンなど
ン単独で或いは混合して用いることができる。このうち
、特にステレノ系樹脂またはポリエステル樹脂が好まし
い。バインダーのトナー粉末全景に対する割合は30〜
65重量%の範囲である。
As the binder, conventional binders can be used as they are, but thermoplastic 4'iH resin is preferable. Specifically, polymers or copolymers based on Ste V/ or its substituted products, such as polystyrene, polyvinyltoluene, styrene-butadiene copolymer, styrene-acrylic acid ester copolymer, and styrene-mannic anhydride copolymer. , polyester resin, acrylic resin, xylene resin, polyamide resin, ionomer resin, ketone tlJ resin, terpene resin, phenol-modified terpene resin, rosino, rosin-modified resin, maleic acid-modified phenol resin, petroleum-based resin, starch graft polymer, Polyvinyl alcohol, polyvinyl vinyl 017, etc. can be used alone or in combination. Among these, stereo resins and polyester resins are particularly preferred. The ratio of binder to toner powder is 30~
It is in the range of 65% by weight.

以上の如きバインダーと共にトナー粉末ぞ構成プ゛るト
ナー成分は、着色剤、磁性トナーとする場合には磁性体
、及び必要に応じて添加される添加剤である。
The toner components that constitute the toner powder together with the binder as described above include a colorant, a magnetic material in the case of a magnetic toner, and additives added as necessary.

着色剤としては、カーボンブランク、ニグロシン染料(
C,,1,Δ650415B)、アニリンツルー(C,
1,、I650405 )、カルコオーrルフル−(C
,I。
As a coloring agent, carbon blank, nigrosine dye (
C,,1,Δ650415B), Aniline True (C,
1, I650405), Calcoalfur-(C
,I.

A6azoec Blue 3 )、クロムイx o 
−(C,1,%14090 )、ウルトラマリンブルー
(C,1,A77103 )、デュポンオイルレッド(
C,1,A126105 )、キノリンイエロー(C,
1,/1647005)、メチレンブルークロライド(
C,1,痛52015 )、フタロシアニンブルー(C
11,/% 74160 )、72カイトグリーンオク
サレー) (C,1,A642000 )、ラングブラ
ンク(C,1,A67726G )、ローズベンガル(
C,1,A 45435 )、これらの混合物、その他
ン挙げることができる。これら着色剤は、十分な儂度の
可視像が形成でれるに十分な割合で含存芒れることか必
要であり5通常バインダーlOO重量部に対して1〜2
0重量部程度の割合とてれる。
A6azoec Blue 3), Chrome x o
-(C,1,%14090), Ultramarine Blue (C,1,A77103), DuPont Oil Red (
C,1,A126105), quinoline yellow (C,
1,/1647005), methylene blue chloride (
C, 1, Pain 52015), Phthalocyanine Blue (C
11,/% 74160), 72 Kite Green Oxale) (C,1,A642000), Langblank (C,1,A67726G), Rose Bengal (
C,1,A45435), mixtures thereof, and others. These colorants must be present in a sufficient proportion to form a visible image of sufficient strength, usually from 1 to 2 parts by weight per 100 parts by weight of the binder.
The proportion is estimated to be about 0 parts by weight.

前記磁性体の具体例としては、コバルト、鉄、ニッケル
などの金妨粉、アルミニウム、コバルト、銅、鉄、鉛、
ニッケル、マグネシウム、スズ、亜鉛、金、銀、セレン
、チタン、タングステン、ジルコニウムなどの金属の合
金及びそれらの混合物、酸化アルミニウム、酸化鉄、酸
化ニッケルなどの磁性金属酸化物及びこれを含む金属化
合物、強磁性フェライト及びその混合物ケ挙げることが
できる。これらの磁性体は倣粉末とはれてトナー粒子中
に分散斃れ、その割合は、トナー粉末全量に対して10
〜80重量%、好ましくは35〜65重景%と虚部る。
Specific examples of the magnetic material include cobalt, iron, gold interference such as nickel, aluminum, cobalt, copper, iron, lead,
Alloys of metals such as nickel, magnesium, tin, zinc, gold, silver, selenium, titanium, tungsten, and zirconium, and mixtures thereof; magnetic metal oxides such as aluminum oxide, iron oxide, and nickel oxide; and metal compounds containing these; Mention may be made of ferromagnetic ferrites and mixtures thereof. These magnetic substances are mixed with the imitation powder and dispersed in the toner particles, and the proportion thereof is 10% of the total amount of toner powder.
The imaginary part is 80% by weight, preferably 35-65% by weight.

な2磁性体が着色剤としての効果ン示すこともある。2 Magnetic materials may also be effective as colorants.

以下本発明の丈施例について説明するが、本発明がこれ
によって限定されるものではない。「部」は重量部を表
わす。
Examples of the length of the present invention will be described below, but the present invention is not limited thereto. "Part" represents part by weight.

実施例 スチレン−アクリル酸n−グチル共重合体 47.5部
マグネタイト微粉末rBL−100J (ナタノ工業イ土製)   52.5部低軟化Aボリグ
ロビレン「ビスコール660PJ(三洋化成社製)  
 3部 荷電制御剤「オイルブラック5OJ (オリエント化学社製)   1部 以上の物質を二本ロールにより温度140〜145°C
に加熱して30分間混練し、冷却後粗粉砕及び微粉砕τ
行ない、更に分級2行なって平均最大幅8.5μの不定
形粒子の粉末を得、これ乞温度380℃の熱気流中に飛
翔はせて球形化処理ン行ない、再度分級ケ行なって平均
粒径12.2μの球形粒子より成る第1のトナー粉末を
製造した。また球形化処理ケ施していない不定形粒子の
粉末ンそのまま第2のトナー粉末として用い、これと第
1のトナー粉末とぞ第1表に示す割合で混合して合計5
棟の一成分系fA像剤(現像剤Al−165)ぞ訓戒し
、その各々により、電子写真複写機1 U −Bix 
T J(小西六写真工業社製)ン用いてコピーテス)Y
行なった。テスト初期に3いて得られた複写画像の性状
ケ調べたところ、第1表に示す結果が得られた。表中、
現像剤Cl−C4は何れも比較のだめのものであり、現
像剤CIは第1のトナー粉末のみよジ成る現飲剤、同C
2/fi第2のトナー粉末のみより成る現像剤、同C3
は第1のトナー粉末と同様にして製造した平均粒径8,
5μの球形粒子より成る現像剤、同C4は第2のトナー
と同様にして8・3造1−た半均最大幅が12.2μの
不定形粒子よジ成る現像剤である。
Example: Styrene-n-gyl acrylate copolymer 47.5 parts Magnetite fine powder rBL-100J (manufactured by Natano Kogyo Ito) 52.5 parts Low softening polyglobylene A "Viscol 660PJ (manufactured by Sanyo Chemical Co., Ltd.)
3 parts Charge control agent "Oil Black 5OJ (manufactured by Orient Chemical Co., Ltd.) 1 part or more of the substance was heated with two rolls at a temperature of 140 to 145°C.
Kneaded for 30 minutes, then coarsely crushed and finely crushed
Then, two more rounds of classification were carried out to obtain powder of amorphous particles with an average maximum width of 8.5 μm, which was then blown into a hot air stream at a temperature of 380°C to be spheronized, and then classified again to determine the average particle size. A first toner powder consisting of 12.2 micron spherical particles was produced. In addition, powder of amorphous particles that have not been subjected to spheroidization treatment is used as it is as a second toner powder, and mixed with the first toner powder in the proportions shown in Table 1 to give a total of 5.
The one-component fA developer (developer Al-165) in the ridge is admonished, and each of them is used in the electrophotographic copying machine 1 U-Bix.
Copy test using T J (manufactured by Konishiroku Photo Industry Co., Ltd.) Y
I did it. When the properties of the copied images obtained at the beginning of the test were investigated, the results shown in Table 1 were obtained. In the table,
Developers Cl-C4 are all comparable, and developer CI is a developer containing only the first toner powder;
2/fi developer consisting only of second toner powder, same C3
was produced in the same manner as the first toner powder with an average particle size of 8,
The developer C4 is made up of spherical particles of 5 microns in size, and C4 is a developer made up of amorphous particles with a half-average maximum width of 12.2 microns, which are 8.3-sized and 1-1 in the same manner as the second toner.

更にコピーテスト22000回に亘って行なったときの
終期の抜写画像についても同様の評価ぞ行なった。結果
ン第2表に示す。
Furthermore, the same evaluation was performed on the final copy images obtained after 22,000 copy tests. The results are shown in Table 2.

第 1 表 第  2  表 以上の結果から明かなように、第1のトナー粉末と第2
のトナー粉末とン混合し7て成る本発明のトナーによれ
ば、III像濃度及び解像度が高く、しかもカブリのな
い優れた複写画像が多数形成されるが、第1のトナー粉
末のみより成るトナーによれば解像度が低く、第2のト
ナー粉末のみより成るトナーによれば流動性が低いため
に画像0度が低い。また平均粒径の小ざい球形粒子より
成るトナー(現像剤C3)によれば、比較的早期に感光
体ドラムのクリーニング不良によるカプリが発生する。
As is clear from the results above in Table 1 and Table 2, the difference between the first toner powder and the second toner powder
According to the toner of the present invention, which is mixed with the toner powder of the first toner powder, a large number of excellent copied images with high III image density and resolution and without fogging are formed. According to the above, the resolution is low, and the toner made of only the second toner powder has low fluidity, so the 0 degrees of the image is low. Furthermore, with the toner (developer C3) made of spherical particles with a small average particle diameter, capri occurs relatively early due to poor cleaning of the photoreceptor drum.

一方平均最大幅が比較的大きい不定形粒子より成るトナ
ー(現像剤C4)によれば高い解像度馨イシすることか
できない。
On the other hand, a toner (developer C4) composed of amorphous particles having a relatively large average maximum width cannot achieve high resolution.

\2、−ノ\2, -ノ

Claims (1)

【特許請求の範囲】 l)球形粒子よp成る第1のトナー粉末と、この第1の
トナー粉末の平均粒径よジ小芒い平均最大幅ン有する不
定形粒子より成る第2のトナー粉末との混合体より成る
ことン特徴とする静電荷像現像用トナー。 2L第1のトナー粉末の平均粒径が10〜30μ であ
る特許請求の範囲第1項記載の静電荷像現像用トナー。 3)第1のトナー粉末の粒子及び第2のトナー粉末の粒
子が何れも磁性体ン含有する特許請求の範囲第1項また
は第2項記載の静電荷像現像用トナー。
[Claims] l) A first toner powder consisting of spherical particles, and a second toner powder consisting of irregularly shaped particles having an average maximum width smaller than the average particle diameter of the first toner powder. A toner for developing electrostatic images characterized by comprising a mixture of 2. The toner for developing electrostatic images according to claim 1, wherein the average particle size of the 2L first toner powder is 10 to 30 microns. 3) The toner for developing an electrostatic image according to claim 1 or 2, wherein both the first toner powder particles and the second toner powder particles contain a magnetic material.
JP57212738A 1982-12-06 1982-12-06 Toner for electrostatic charged image development Pending JPS59102252A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57212738A JPS59102252A (en) 1982-12-06 1982-12-06 Toner for electrostatic charged image development

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57212738A JPS59102252A (en) 1982-12-06 1982-12-06 Toner for electrostatic charged image development

Publications (1)

Publication Number Publication Date
JPS59102252A true JPS59102252A (en) 1984-06-13

Family

ID=16627608

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57212738A Pending JPS59102252A (en) 1982-12-06 1982-12-06 Toner for electrostatic charged image development

Country Status (1)

Country Link
JP (1) JPS59102252A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61279864A (en) * 1985-06-06 1986-12-10 Showa Denko Kk Toner for electrostatic image development
JPH04232965A (en) * 1990-12-27 1992-08-21 Tomoegawa Paper Co Ltd Dry toner
US5220390A (en) * 1987-11-11 1993-06-15 Minolta Camera Kabushiki Kaisha Electrophotographic image forming process
US5565295A (en) * 1991-04-11 1996-10-15 Agfa-Gevaert, N.V. Electrophotographic developer composition
JP2006293335A (en) * 2005-03-16 2006-10-26 Ricoh Co Ltd Image forming apparatus, toner for image formation, and process cartridge
JP2010066573A (en) * 2008-09-11 2010-03-25 Fuji Xerox Co Ltd Toner for flash fixing, developer for flash fixing, toner cartridge, and image forming apparatus
JP2013222049A (en) * 2012-04-16 2013-10-28 Kyocera Document Solutions Inc Magnetic one-component developer

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61279864A (en) * 1985-06-06 1986-12-10 Showa Denko Kk Toner for electrostatic image development
JPH0629979B2 (en) * 1985-06-06 1994-04-20 昭和電工株式会社 Toner for electrostatic image development
US5220390A (en) * 1987-11-11 1993-06-15 Minolta Camera Kabushiki Kaisha Electrophotographic image forming process
JPH04232965A (en) * 1990-12-27 1992-08-21 Tomoegawa Paper Co Ltd Dry toner
US5565295A (en) * 1991-04-11 1996-10-15 Agfa-Gevaert, N.V. Electrophotographic developer composition
JP2006293335A (en) * 2005-03-16 2006-10-26 Ricoh Co Ltd Image forming apparatus, toner for image formation, and process cartridge
JP4676909B2 (en) * 2005-03-16 2011-04-27 株式会社リコー Image forming apparatus and process cartridge
JP2010066573A (en) * 2008-09-11 2010-03-25 Fuji Xerox Co Ltd Toner for flash fixing, developer for flash fixing, toner cartridge, and image forming apparatus
JP2013222049A (en) * 2012-04-16 2013-10-28 Kyocera Document Solutions Inc Magnetic one-component developer

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