JPS59220745A - Magnetic toner - Google Patents
Magnetic tonerInfo
- Publication number
- JPS59220745A JPS59220745A JP58094835A JP9483583A JPS59220745A JP S59220745 A JPS59220745 A JP S59220745A JP 58094835 A JP58094835 A JP 58094835A JP 9483583 A JP9483583 A JP 9483583A JP S59220745 A JPS59220745 A JP S59220745A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- magnetic
- magnetic toner
- styrene
- coercive force
- 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
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/083—Magnetic toner particles
- G03G9/0838—Size of magnetic components
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/083—Magnetic toner particles
- G03G9/0835—Magnetic parameters of the magnetic components
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Developing Agents For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
本発明Fi電子写真法或いは静電印刷法などに於いて、
電気的潜像または磁気的潜像を現像するのに用いられる
磁性トナーに関する。[Detailed description of the invention] In the Fi electrophotographic method or electrostatic printing method of the present invention,
The present invention relates to magnetic toners used to develop latent electrical or magnetic images.
従来より、電子写真法については米国特許229769
1号、特公昭42−23910号公報(米国特許第36
66363号明細魯〕、特公昭43−24748号公報
(米国特許第4071361号明細書)等に記載されて
いるごとく、光導電層上に一様に帯電を行ない原稿に応
じた光像露光することによ夕露光部分の電荷を消滅させ
潜像形成を行なう。この得られた静電潜像上に微粉末検
電物質、所謂、トナーを付着させることにより現像を行
なう。トナーは光導電層上の電荷量の大小に応じて静電
潜像に引きつけられ、濃淡を持ったトナー像を形成する
。このトナー像は必要に応じて紙又は布等の支持表面に
転写を行ない、加熱、加圧等により、支持表面上に永久
定着する。またトナー像転写工程を省略したい場合には
このトナー像を光導電体層に定着することもできる。前
記の定着方法以外に溶剤処理や上塗り処理のような他の
手段を用いることも可能である。Conventionally, regarding electrophotography, U.S. Patent No. 229769
No. 1, Japanese Patent Publication No. 42-23910 (U.S. Patent No. 36
As described in Japanese Patent Publication No. 43-24748 (US Pat. No. 4,071,361), the photoconductive layer is uniformly charged and exposed to a light image corresponding to the original. A latent image is formed by eliminating the charge in the exposed area. Development is carried out by depositing a finely powdered electrostatic substance, so-called toner, on the obtained electrostatic latent image. The toner is attracted to the electrostatic latent image depending on the amount of charge on the photoconductive layer, forming a toner image with shading. This toner image is transferred to a support surface such as paper or cloth as necessary, and permanently fixed on the support surface by heating, pressure, or the like. Alternatively, if it is desired to omit the toner image transfer step, the toner image can be fixed to the photoconductor layer. In addition to the fixing method described above, it is also possible to use other means such as solvent treatment and overcoating treatment.
この電子写真における現像方法は数多く知らnておシ、
これまで、キャリアと混合して2成分トナーとして用い
る現像法である、米国特許2618552号明細書記載
のカスケード現像法、米国特許2874063号明細書
記載の磁気ブラシ法、などが広く行なわれてきた。There are many known developing methods for this electrophotography.
Until now, development methods such as the cascade development method described in US Pat. No. 2,618,552 and the magnetic brush method described in US Pat. No. 2,874,063, which are development methods in which toner is mixed with a carrier and used as a two-component toner, have been widely used.
しかし、近年、キャリアを使わない一成分系磁性トナー
による現像法が用いられるようになってきた。この磁性
トナーによる現像法は上述の2成分トナーのそれに比較
して、トナー濃度検出−及び制御機構を必要としない。However, in recent years, a developing method using a one-component magnetic toner that does not use a carrier has come into use. This magnetic toner development method does not require toner concentration detection and control mechanisms compared to the two-component toner described above.
現像装置を簡単小型化することができる。エツジ効果が
少なく、ヘタ黒部の再現が良好であるなど、多くの長所
を有している。The developing device can be easily downsized. It has many advantages, such as less edge effect and good reproduction of dark areas.
現在、磁性トナー用強磁性微粉末としては、鉄、ニッケ
ル、コバルト、マンガン、などの単体あるいはマグネタ
イト(Fe2O2)、γ−へマタイト(γ−Fe2J)
、フェライト、その他強磁性を示すパーマアロイなどの
合金が提案されている。Currently, ferromagnetic fine powders for magnetic toner include iron, nickel, cobalt, manganese, etc. alone, magnetite (Fe2O2), γ-hematite (γ-Fe2J), etc.
, ferrite, and other alloys such as permanent alloys that exhibit ferromagnetism have been proposed.
しかし、と、TLら金属の単体、合金類は、トナーとし
て用いるための微粉砕化の過程で物性的に不安定さを増
す傾向がありまた工程中爆発の危険さえも有している。However, single metals and alloys such as TL tend to become physically unstable during the process of pulverization for use as toner, and even have the risk of explosion during the process.
マグネタイト、フェライトに関しては、磁気的性質、電
気的特質はほぼ満足される値を有しておシ、実用化もな
されている。Magnetite and ferrite have almost satisfactory magnetic properties and electrical properties, and have been put into practical use.
けれども、かかる強磁性微粉末を5用いても、磁性トナ
ーとしての摩擦帯電性及び現像装置内での搬送性につい
て問題を有している。However, even if such ferromagnetic fine powder is used, there are problems with the triboelectric charging properties as a magnetic toner and the transportability within a developing device.
一般に磁性トナーの帯電は、内部に永久磁石棒を挿入配
設した円筒状現像スリーブとの接触−摩擦によシ行ない
、現像時に必要な静電力を獲得する。しかしこの場合も
、キャリアを有しない磁性ドブ−を如・何に安定かつ均
一に高い帯電させるかが重要な課題である。不均一で、
弱い帯電能しか有しないトナーは、現像時、静電潜像以
外へのトナー付着である、所謂カブリや転写時トナーの
低いクーロン力のための転写材への弱いトナー付着が生
ずる。この転写材への弱いトナー付着は、定着ロールに
転写材が進入した時定着ロールと転写材とその上の転写
トナーによシ作られた微少の間隙である空気層のっぷわ
により複写画像上で尾引きの原因となる。In general, magnetic toner is charged by contact and friction with a cylindrical developing sleeve in which a permanent magnet rod is inserted, and the electrostatic force required during development is obtained. However, in this case as well, the important issue is how to stably and uniformly highly charge the magnetic doves that do not have carriers. uneven,
Toner having only a weak charging ability causes so-called fog, which is toner adhesion to areas other than the electrostatic latent image, during development, and weak toner adhesion to the transfer material due to the low Coulomb force of the toner during transfer. This weak toner adhesion to the transfer material is caused by an air gap, which is a minute gap created between the fixing roll, the transfer material, and the transferred toner on the fixing roll, when the transfer material enters the fixing roll, causing the copy image to appear on the copy image. This causes tailing.
特に上述の尾引き現象は、体積抵抗が低下し、同時に摩
擦帯電能が低下する高温高湿下において著しい。In particular, the above-mentioned tailing phenomenon is remarkable under high temperature and high humidity conditions, where the volume resistivity decreases and the triboelectric charging ability decreases at the same time.
磁性トナーの主要な構成成分である磁性体の保磁力、平
均粒径がトナーの物性及び電子写真特性に及ばず影響は
著しいものである。The coercive force and average particle size of the magnetic material, which is the main component of magnetic toner, have a significant influence on the physical properties and electrophotographic properties of the toner.
磁性体の保磁力は、該磁性体、換言すればそれを含有し
た磁性トナーの永久&1石としての能力を示す一つの指
標である。この保磁力が高ければ高いほど、磁性トナー
は前述の現像スIJ−ブ上に強く固着されることになり
搬送性が損なわれ、帯電能力が低下する。逆に保磁力が
低くすぎると、現在スリーブ上にトナーが円滑に保持搬
送さnず、現像器からのトナー落下、又はトナー飛散の
原因となる。The coercive force of a magnetic material is one index indicating the ability of the magnetic material, in other words, the magnetic toner containing it, as a permanent magnet. The higher this coercive force is, the more strongly the magnetic toner is fixed on the above-mentioned developing tube, thereby impairing the conveyance property and lowering the charging ability. On the other hand, if the coercive force is too low, the toner will not be smoothly held and transported on the current sleeve, causing toner to fall from the developing device or toner to scatter.
磁性トナーの搬送性に寄与する別の因子としては、上述
の磁性体の特性のほかに磁性トナーそのものの流動性が
ある。この流動性が高くなるにつイ1. )ナーの現像
装置内での移動は好ましくなシ、帯電しやすくなるが反
面あ″!、υ流動性が良いと転写工程中、磁性トナーが
動きやすくなり、転写画像の乱れが生じやすい。Another factor that contributes to the transportability of the magnetic toner is the fluidity of the magnetic toner itself, in addition to the above-mentioned characteristics of the magnetic material. As this liquidity increases, 1. ) The movement of the toner within the developing device is preferable, as it makes it easier to charge, but on the other hand, if the toner has good fluidity, the magnetic toner moves easily during the transfer process, which tends to cause disturbances in the transferred image.
磁性体の平均粒径は細かい粒度はど、製造された磁性ト
ナー内部に分散される、又はトナー表面に露出する磁性
体が増し、体積固有抵抗や表面抵抗は低下する傾向が生
じ、帯電能力が悪くなりカブリ、尾引きの遠因となる。As the average particle size of the magnetic material becomes finer, the amount of magnetic material dispersed inside the produced magnetic toner or exposed on the toner surface increases, the volume resistivity and surface resistance tend to decrease, and the charging ability decreases. This worsens and becomes a cause of fogging and trailing.
また、平均粒径が粗目になると、トナーの製造工程中で
磁性トナー中に磁性体単味が混合されることになp1耐
久中に画像上への白スジ、濃度低下が発生しや〜すくな
る。In addition, if the average particle size becomes coarse, the magnetic material alone will be mixed into the magnetic toner during the toner manufacturing process, which will easily cause white streaks on the image and a decrease in density during P1 durability. Become.
従来の技術では、磁性体の物性、粒径など個個に検討し
たものがあるが、本発明者等は磁性体及び磁性トナーの
特性について種々検討の後、磁性体の個々の保磁力や粒
径だけの規定だけでは十分性能の高い磁性トナーを得る
ことが出来ず保磁力と粒径そしてその特性を有した磁性
体を含有したトナーの流動性を総合的に規定して初めて
、摩擦?g電性及び搬送性の良好な磁性トナーを得られ
ることを見い出し本発明を完成するに到った。In conventional technology, the physical properties and particle size of magnetic materials have been investigated individually, but after various studies on the characteristics of magnetic materials and magnetic toner, the present inventors have investigated the individual coercivity and particle size of magnetic materials. It is not possible to obtain a magnetic toner with sufficiently high performance by specifying only the diameter, but only by comprehensively specifying the coercive force, particle size, and fluidity of the toner containing a magnetic material with these characteristics. It was discovered that a magnetic toner with good conductivity and transportability could be obtained, and the present invention was completed.
本発明は、従来の磁性トナーとは異なった、性能の良好
な磁性トナーを提供するものである。The present invention provides a magnetic toner with good performance, which is different from conventional magnetic toners.
その目的とする所はきわめて良好な摩擦帯電性を有する
磁性トナーを提供するものである。The objective is to provide a magnetic toner having extremely good triboelectric charging properties.
また別の目的は現像装置内での搬送性が好ましい磁性ト
ナーを提供するものである。Another object of the present invention is to provide a magnetic toner that has favorable transportability within a developing device.
また別の目的は画質的に尾引き、カブリをきわめて改良
した磁性トナーを提供するものである。Another object of the present invention is to provide a magnetic toner with significantly improved image quality in terms of trailing and fogging.
また別の目的は耐久性の良い磁性トナーを提供するもの
である。Another object is to provide a magnetic toner with good durability.
本発明の目的は、平均粒径、保磁力がそれぞno、65
〜0.90μ、60〜1000e(エルステッド)の範
囲にある強磁性微粉末を含有した磁性トナーであフ、か
つ該磁性トナーの凝年度が5〜25チである磁性トナー
により達成することができる。The object of the present invention is that the average particle size and coercive force are no and 65, respectively.
This can be achieved by a magnetic toner containing ferromagnetic fine powder in the range of ~0.90μ, 60-1000e (Oersted), and the coagulation year of the magnetic toner is 5-25 inches. .
本発明において、各範囲の値は、実施例において詳細に
述べられているごとくマトリックスを組み設定された値
であり、平均粒径が0.65μ未満では高温高湿下で尾
引き、カブリが発生し、0.90μを越えると耐久中に
白スジが出やすい。また磁性体の磁気特性としては保磁
力が60〜1000eが最適領域であシそれを越えても
、それ未満でも搬送性に問題が生じやすい。In the present invention, the values in each range are values set by combining the matrix as described in detail in the examples, and if the average particle size is less than 0.65μ, trailing and fogging will occur under high temperature and high humidity. However, if it exceeds 0.90μ, white streaks are likely to appear during durability. Further, as for the magnetic properties of the magnetic material, the optimum range is a coercive force of 60 to 1000 e, and even if it exceeds this range or is less than that, problems tend to occur in transportability.
本発明に用いられる強磁性微粉末としては、強磁性元素
及びこれらを含む合金、化合物であるマグネタイト、ヘ
マタイト、フェライトなどの鉄、コバルト、ニッケル、
マンガンなどの合金や化合物がある。The ferromagnetic fine powder used in the present invention includes ferromagnetic elements and alloys containing these, iron, cobalt, nickel, such as magnetite, hematite, and ferrite, which are compounds.
There are alloys and compounds such as manganese.
特に本発明に適した磁性体としては、鉄フエライト中に
下記の金属、又は金属酸化物を一種又は二種以上、成分
として含有した強磁性7エライトが好ましい。その量比
としてはフェライト中の全鉄に対し、含有した金属又は
金属酸化物の金属単体としての換算で0.001〜20
%カ好ましい。特に0.01〜15%が良好である。In particular, as a magnetic substance suitable for the present invention, a ferromagnetic hepterarite containing one or more of the following metals or metal oxides as components in iron ferrite is preferable. Its quantitative ratio is 0.001 to 20 in terms of the contained metal or metal oxide as a single metal to the total iron in the ferrite.
% is preferred. Particularly good is 0.01 to 15%.
鉄フエライト中に含有しうる金属、金属酸化物としては
、例えば、Mn、 FIB、 00% Ni、Cu、
Zn。Examples of metals and metal oxides that can be contained in iron ferrite include Mn, FIB, 00% Ni, Cu,
Zn.
?s Caその他Li、Baの元素記号で示される金属
がある。? s There are other metals represented by the element symbols Li and Ba as well as Ca.
磁性トナー中に含有される磁性体は結着樹脂100部に
対し30〜100部、好ましくは40〜90部、よシ好
ましくは50〜85部含有することが出来る。またその
磁性トナーの流動性は、凝集度換算で5〜25%、好ま
しくは5.5〜15.0係が望ましい。The magnetic substance contained in the magnetic toner can be contained in an amount of 30 to 100 parts, preferably 40 to 90 parts, and most preferably 50 to 85 parts, based on 100 parts of the binder resin. Further, the fluidity of the magnetic toner is desirably 5 to 25%, preferably 5.5 to 15.0% in terms of the degree of cohesion.
本発明に使用する結着樹脂としては公知のものがすべて
使用可能であるが、例えばポリスチレン、ホIJ T)
−クロルスチレン、ポリビニルトルエンなどのスチレン
及びその置換体の単重合体;スチレン−P−クロルスチ
レン共重合体、スチレン−プロピレン共重合体、スチレ
ン−ビニルトルエン共M 合体%スチレンービニルナフ
タリン共重合体、スチレン−アクリル酸メチル共重合体
、スチレン−アクリル酸エチル共重合体、スチレン−ア
クリル酸ブチル共重合体、スチレン−アクリル酸オクチ
ル共重合体、スチレン−メタクリル酸メチル共重合体、
スチレン−メタクリル酸エチル共重合体、スチレン−メ
タクリル酸ブチル共重合体、スチレン−αクロルメタク
リル酸メチル共重合体、スチレン−アクリロニトリル共
重合体、スチレン−ビニルメチルエーテル共重合体、ス
チレン−ビニルエチルエーテル共重合体、スチレン−ビ
ニルメチルケトン共重合体、スチレン−ブタジェン共重
合体、スチレン−イソプレン共重合体、スチレン−アク
リロニトリル−インデン共重合体、スチレン−マレイン
m共x合体、スチレン−マレイン酸エステル共重合体な
・どのスチレン系共重合体;ポリメチルメタクリレート
、ポリブチルメタクリレート、ポリ塩化ビニル、ポリ酢
酸ビIル、ポリエチレン、ポリプロピレン、ポリエステ
ル、ポリウレタン、エポキシ樹脂、ポリビニルブチラー
ル、ポリアマイド、ポリアクリル酸樹脂、ロジン、変牲
ロジン、テルペン樹脂、フェノール樹脂、脂肪族又は脂
環族炭化水素樹脂、芳香族系石油w脂、塩素化パラフィ
ン、パラフィンワックスなどが単独或いは混合して使用
できる。As the binder resin used in the present invention, all known binder resins can be used, such as polystyrene,
- Monopolymers of styrene and its substituted products such as chlorostyrene and polyvinyltoluene; styrene-P-chlorostyrene copolymer, styrene-propylene copolymer, styrene-vinyltoluene co-M Copolymer% styrene-vinylnaphthalene copolymer , styrene-methyl acrylate copolymer, styrene-ethyl acrylate copolymer, styrene-butyl acrylate copolymer, styrene-octyl acrylate copolymer, styrene-methyl methacrylate copolymer,
Styrene-ethyl methacrylate copolymer, styrene-butyl methacrylate copolymer, styrene-alpha chloromethyl methacrylate copolymer, styrene-acrylonitrile copolymer, styrene-vinyl methyl ether copolymer, styrene-vinylethyl ether copolymer, styrene-vinyl methyl ketone copolymer, styrene-butadiene copolymer, styrene-isoprene copolymer, styrene-acrylonitrile-indene copolymer, styrene-maleic m copolymer, styrene-maleic acid ester copolymer Styrenic copolymers such as polymers; polymethyl methacrylate, polybutyl methacrylate, polyvinyl chloride, polyvinyl acetate, polyethylene, polypropylene, polyester, polyurethane, epoxy resin, polyvinyl butyral, polyamide, polyacrylic resin, Rosin, modified rosin, terpene resin, phenol resin, aliphatic or alicyclic hydrocarbon resin, aromatic petroleum fat, chlorinated paraffin, paraffin wax, etc. can be used alone or in combination.
さらに本発明に使用される磁性トナー中には、着色調色
、流動性改良、荷電制御等の目的でカ−ボンブラック等
各種染顔料及びコロイダルシリカなどが含有さイtても
良い。Furthermore, the magnetic toner used in the present invention may contain various dyes and pigments such as carbon black, colloidal silica, etc. for the purpose of toning, improving fluidity, controlling charge, and the like.
磁性体の保磁力の測定は、振動試料型磁力計(東英工業
製)を用いた。被検磁性体を約a1〜1fを秤量し、外
部磁場を10KOe印加し、レコーダーに磁気ヒステリ
シスを記録することにより保磁力を測定した。A vibrating sample magnetometer (manufactured by Toei Kogyo) was used to measure the coercive force of the magnetic material. Approximately a1 to 1f of the magnetic material to be tested was weighed, an external magnetic field of 10 KOe was applied, and the coercive force was measured by recording the magnetic hysteresis on a recorder.
測定方法としては、まず外部磁場10KOeを引加し、
徐々に小さくすると同時にレコーダーに記録を始める。The measurement method is to first apply an external magnetic field of 10 KOe,
Gradually reduce the size and at the same time start recording on the recorder.
外部磁場がQOeになったら、次に逆磁場を徐々に印加
し、10KOetで印加する。保磁力については、レコ
ーダーに記録されたヒステリシスループのX軸の値を直
読する。When the external magnetic field reaches QOe, a reverse magnetic field is gradually applied at 10 KOet. Regarding the coercive force, directly read the X-axis value of the hysteresis loop recorded on the recorder.
なお、全測定前にニッケルのスタンダード(標準試料う
で出力を調整しておく。In addition, before all measurements, adjust the output with the nickel standard (standard sample arm).
また本発明における平均粒径の測定は、空気透過法を原
理としたフィッシャー法によった。Further, the average particle diameter in the present invention was measured by the Fisher method based on the air permeation method.
磁性トナーの流動性は、凝集度によって代表させた。The fluidity of the magnetic toner was represented by the degree of aggregation.
磁性トナーの凝集度の測定はパウダーテスター(細用ミ
クロン製)を用いた。2fの被検トナーをと9、それを
60.100.200メツシユの重ね合わせ71cフル
イにかけ、その後それぞれのフルイ残分を下の式にあて
はめ凝集度を求めた。The degree of aggregation of the magnetic toner was measured using a powder tester (manufactured by Hoiyo Micron). 2F of the toner to be tested was passed through a 71C sieve with 60, 100, and 200 meshes, and then the degree of aggregation was determined by applying the residue from each sieve to the formula below.
凝集度(%) = A+ B 十〇 以下実施例によりさらに詳細に説明する。Cohesion degree (%) = A + B 10 The present invention will be explained in more detail with reference to Examples below.
実施例1 比較例1〜6
ポリエチレン樹脂 100部
磁性体 60部
荷電制御剤 3部
上記のトナー材料を2本ロールにより混線し、さらにス
ピードミル、ジェットミル粉砕後、分級工程を経て5〜
30μの磁性トナーを得た。次いで、該磁性トナーにコ
ロイダルシリカをヘンシェルミキサーによシ混合添加し
、その添加量、混合速度、及び時間を変化させ所望の凝
集度の磁性トナーを得た。Example 1 Comparative Examples 1 to 6 100 parts of polyethylene resin 60 parts of magnetic material 3 parts of charge control agent
A 30μ magnetic toner was obtained. Next, colloidal silica was mixed and added to the magnetic toner using a Henschel mixer, and the addition amount, mixing speed, and time were varied to obtain a magnetic toner having a desired degree of aggregation.
磁性体の保磁力、粒径、そして該磁性体を含有した磁性
トナーの流動性の3つの要因を変化させた磁性l・ナー
を上記の方法より製造し、その高温高湿下での画質、耐
久性能を比較したものを表に示した。Magnetic l-toner was produced by the above method in which the three factors of coercive force of the magnetic material, particle size, and fluidity of the magnetic toner containing the magnetic material were changed, and the image quality under high temperature and high humidity, A comparison of durability performance is shown in the table.
実施例 2
結着樹脂f x f v :y″″7″υ″″7″υ″
樹脂以外は実施例1と同様に磁性トナーを製造し、NP
−201複写機(キャノン製)で高温高湿下で画出しし
たが鮮明なカブリのない画像が得られた。Example 2 Binder resin f x f v :y″″7″υ″″7″υ″
A magnetic toner was produced in the same manner as in Example 1 except for the resin, and NP
-201 copying machine (manufactured by Canon) under high temperature and high humidity, clear and fog-free images were obtained.
実施例 3
磁性体を保磁力、平均粒径が92.10e、0.68μ
のものを用い、他は実施例2と同様に製造し、凝集度を
6.4俤の磁性トナーを得て、連続耐久したが、1万枚
後も現伶機内でのトナーの搬送性は初期と変らず、画質
的にも良好なものであった。Example 3 The magnetic material has a coercive force and an average particle size of 92.10e and 0.68μ
A magnetic toner with an agglomeration degree of 6.4 was obtained by manufacturing the toner in the same manner as in Example 2, and was used for continuous durability, but even after 10,000 copies, the toner transportability in the current machine was still poor. The image quality was as good as the initial one.
実施例 4
実施例1で凝集度を198%に調整した磁性トナーを高
温高湿下(35℃85%RH)で画出ししたが尾引き、
ムラのないものであった。Example 4 An image was produced using the magnetic toner whose agglomeration degree was adjusted to 198% in Example 1 under high temperature and high humidity conditions (35° C., 85% RH), but there was no trailing.
It was even.
特許出願人 キャノン株式会社 代 理 人 弁理士 狩 野 有305−Patent applicant: Canon Co., Ltd. Representative Patent Attorney Kari No Yu 305-
Claims (2)
μ、60〜1(IQOe(エルステッド)の範囲にある
強磁性微粉末を含有し、磁性トナーの凝集度が5〜25
%であることを特徴とする磁性トナ0(1) Average particle size and coercive force are each 0.65 to 0.90
μ, contains ferromagnetic fine powder in the range of 60 to 1 (IQOe (Oersted)), and the degree of agglomeration of the magnetic toner is 5 to 25.
Magnetic toner characterized by being 0%
0部を含有した特許請求範囲第一項記載の磁性トナー。(2) 30 to 10 parts of ferromagnetic fine powder per 100 parts of binder M resin
0 parts of the magnetic toner according to claim 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58094835A JPS59220745A (en) | 1983-05-31 | 1983-05-31 | Magnetic toner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58094835A JPS59220745A (en) | 1983-05-31 | 1983-05-31 | Magnetic toner |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS59220745A true JPS59220745A (en) | 1984-12-12 |
Family
ID=14121095
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58094835A Pending JPS59220745A (en) | 1983-05-31 | 1983-05-31 | Magnetic toner |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59220745A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006078982A (en) * | 2004-09-13 | 2006-03-23 | Canon Inc | Toner |
-
1983
- 1983-05-31 JP JP58094835A patent/JPS59220745A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006078982A (en) * | 2004-09-13 | 2006-03-23 | Canon Inc | Toner |
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