JPH0629979B2 - Toner for electrostatic image development - Google Patents
Toner for electrostatic image developmentInfo
- Publication number
- JPH0629979B2 JPH0629979B2 JP60121568A JP12156885A JPH0629979B2 JP H0629979 B2 JPH0629979 B2 JP H0629979B2 JP 60121568 A JP60121568 A JP 60121568A JP 12156885 A JP12156885 A JP 12156885A JP H0629979 B2 JPH0629979 B2 JP H0629979B2
- Authority
- JP
- Japan
- Prior art keywords
- toner
- present
- image
- shape
- charge
- 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.)
- Expired - Lifetime
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
- G03G9/0827—Developers with toner particles characterised by their shape, e.g. degree of sphericity
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Developing Agents For Electrophotography (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は静電荷像現像用トナーに関し、詳しくは、電子
写真法、静電印刷法、静電記録法などにおいて形成され
る静電荷像を現像するためのトナーに関する。The present invention relates to a toner for developing an electrostatic charge image, and more specifically, to an electrostatic charge image formed by an electrophotographic method, an electrostatic printing method, an electrostatic recording method or the like. It relates to toner for developing.
上記した用途に使用されるトナーにおいて、粉砕法によ
るトナーはその形状が角張つているというこから帯電性
が不均一であつたりあるいは長時間使用した場合スペン
トトナーの発生といつた数々の欠点を有する。Among the toners used for the above-mentioned purposes, the toner obtained by the pulverization method has various irregularities because of its uneven charging property or the generation of spent toner when used for a long time. .
そこで、懸濁重合法あるいはスプレードライ法などによ
り、球形トナーを製造する技術が数多く提案されてい
る。しかし、球形トナーは流動性が良好であるがために
２成分系現像剤の場合、トナー補給ボツクスからのトナ
ーはキヤリアとの摩耗性が低く、それ故、摩擦帯電の立
ち上りが悪く帯電性が一定しないという現象が起る。ま
た、トナークリーニング方法がブレード方式の場合球形
なるが故に、クリーニングブレードをかいくぐり、クリ
ーニングされにくいという欠点もある。Therefore, many techniques for producing spherical toners by the suspension polymerization method, the spray drying method, or the like have been proposed. However, since the spherical toner has a good fluidity, in the case of a two-component developer, the toner from the toner replenishing box has a low abrasion property with respect to the carrier, and therefore the frictional charge rises poorly and the charging property is constant. The phenomenon of not doing occurs. In addition, when the toner cleaning method is a blade method, the toner has a spherical shape, so that there is a drawback that it is difficult to clean the toner by passing through the cleaning blade.
本発明はかかる従来技術の有する欠点を解消し、優れた
トナー特性を有する静電荷像現像用トナーを得ることを
目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to solve the above drawbacks of the prior art and obtain an electrostatic image developing toner having excellent toner characteristics.
〔問題点を解決するための手段〕及び〔作用〕 本発明者らは、粉砕法によるトナーや球形トナーがそれ
ぞれ有する欠点を解消でき、しかも、トナーとして優れ
た特性を有する静電荷像現像用トナーについて鋭意検討
したところ、特定の形状係数をもち、表面に凹凸が形成
されかつ歪みのあるトナーによれば、帯電における立ち
上りが早く、帯電量が一定し、従来の球形トナーの有す
る欠点を解消するとともに、粉砕法トナーのごとき帯電
性の不均一がなく、多数枚の連続コピーでもカブリの発
生が認められず、画質の低下も防止され、クリーニング
性も良好で、その他、優れたトナー特性を備えた静電荷
像現像用トナーを得ることに成功した。[Means for Solving Problems] and [Operation] The inventors of the present invention can eliminate the drawbacks of the toner and the spherical toner obtained by the pulverization method, respectively, and have excellent characteristics as a toner. As a result, a toner having a specific shape factor, unevenness formed on the surface and distorted has a quick rise in charging, the charge amount is constant, and the drawbacks of the conventional spherical toner are solved. At the same time, there is no non-uniformity of chargeability like pulverized toner, no fog is observed even in continuous copying of many sheets, deterioration of image quality is prevented, cleaning property is also good, and other excellent toner characteristics are provided. We succeeded in obtaining a toner for developing an electrostatic image.
すなわち、本発明は形状係数ＳＦ１を、 と定義し、また、 形状係数ＳＦ２を と定義した場合、 ＳＦ１が１２０〜１８０ ＳＦ２が１１０〜１３０ なる値をもつ、 表面に凹凸が形成され、かつ、歪みのある静電荷像現像
用トナーに存する。That is, in the present invention, the shape factor SF1 is And shape factor SF2 When SF1 is defined as follows, SF1 has a value of 120 to 180, SF2 has a value of 110 to 130, and an electrostatic charge image developing toner having irregularities formed on the surface and having distortion is present.
次に、本発明のトナーについて詳述する。Next, the toner of the present invention will be described in detail.
本発明のトナーは、トナー表面に従来トナーと異なり凹
凸が形成され、かつ、完全球形でなく歪みを有するもの
である。The toner of the present invention has irregularities formed on the surface of the toner unlike the conventional toner, and is not perfectly spherical but has distortion.
本発明において形状係数とは、トナーの形状などの形態
を表現する係数として使用され、光学顕微鏡などがとら
えた画像の面積、長さ、形状などを高精度に定量解析す
ることができる、画像解析という統計的手法に基づくも
ので、イメージアナライザー〔日本レギュレータ社製、
機種ルーゼツクス５０００〕により測定した場合の当該
形状係数がＳＦ１＝１２０〜１８０、ＳＦ２＝１１０〜
１３０なる範囲の値を示すことが必要である。In the present invention, the shape coefficient is used as a coefficient for expressing the shape such as the shape of toner, and the area, length, shape, etc. of an image captured by an optical microscope or the like can be quantitatively analyzed with high accuracy. It is based on a statistical method called image analyzer [made by Nippon Regulator Co.,
Model Rozex 5000], the shape factors are SF1 = 120 to 180, SF2 = 110.
It is necessary to show values in the range of 130.
ここに、ＳＦ１とはトナー粒子の最大長を２乗したもの
を当該トナー粒子の面積で割った値にπ／４を掛けさら
に１００倍したもので、トナー粒子の形状が円に近い程
１００に近い値になり、逆に細長い程大きな値になるも
ので、すなわち、トナーの長径／短径を差（歪み性）
を、また、ＳＦ２とはトナー粒子の周囲の長さを２乗し
たものを当該トナー粒子の面積で割った値に１／４πを
掛けさらに１００倍したもので、トナー粒子の形状が円
に近い程１００に近い値になり、周囲の形状が複雑なも
の程大きな値になるもので、すなわち、トナー表面積
（凹凸性）を表現するものであり、完全球形であればＳ
Ｆ１＝ＳＦ２＝１００である。Here, SF1 is a value obtained by squaring the maximum length of toner particles divided by the area of the toner particles and multiplying it by π / 4, and further multiplying it by 100. The values are close to each other, and conversely, the longer the slender, the larger the value. That is, the difference between the major axis and the minor axis of the toner (distortion).
Further, SF2 is a value obtained by squaring the length of the circumference of the toner particle, divided by the area of the toner particle, and multiplied by 1 / 4π, and further multiplied by 100, and the shape of the toner particle is close to a circle. The value is close to 100, and the more complex the surrounding shape is, the larger the value is, that is, the toner surface area (unevenness) is expressed.
F1 = SF2 = 100.
ＳＦ１が上記１２０〜１８０の範囲より逸脱するとき
は、帯電量の安定性、カブリ発生の阻止、画像の安定
性、クリーニング特性などの本発明所望の目的を達成で
きないし、ＳＦ２が上記１１０〜１３０なる範囲を逸脱
することも同様に本発明所望の目的を達成できない。When SF1 deviates from the above range of 120 to 180, the desired objects of the present invention such as stability of charge amount, prevention of fog generation, image stability, and cleaning property cannot be achieved, and SF2 of 110 to 130. Departures from the range cannot similarly achieve the desired object of the present invention.
本発明において、これらＳＦ１及びＳＦ２の片方のみこ
れら条件を満足しても本発明所望の目的は達成できず、
例えば、後述する比較例にも示すように、ＳＦ１が１２
０でＳＦ２が108のときすなわちＳＦ１のみが本発明の
ＳＦ１の範囲内の数値であるときは、カブリが目立ち、
画質が乱れ、クリーニング性が不充分で、帯電量も安定
性を欠如しており、また、ＳＦ１が１８８でＳＦ２が１
２０のときすなわちＳＦ２のみが本発明のＳＦ２の範囲
内の数値であるときはクリーニング性が良好であつても
帯電量のバラツキが目立ち、カブリも認められる。In the present invention, even if only one of these SF1 and SF2 satisfies these conditions, the desired object of the present invention cannot be achieved,
For example, as shown in a comparative example described later, SF1 is 12
When 0 and SF2 is 108, that is, when only SF1 is a numerical value within the range of SF1 of the present invention, fog is conspicuous,
The image quality is disturbed, the cleaning property is insufficient, the charge amount is not stable, and SF1 is 188 and SF2 is 1
When it is 20, that is, when only SF2 is a numerical value within the range of SF2 of the present invention, even if the cleaning property is good, the variation in the charge amount is conspicuous and the fog is also recognized.
本発明によるトナーは、例えば、懸濁重合法によるトナ
ーの製法において、(A)界面活性剤と(B)分散剤との混合
比率を(A)／(B)＝２０／1000〜１００／１０００とする
ことにより得ることができる。The toner according to the present invention has a mixing ratio of (A) surfactant and (B) dispersant of (A) / (B) = 20/1000 to 100/1000, for example, in the method of producing a toner by suspension polymerization. It can be obtained by
懸濁重合法は、一般に、重合性単量体や重合開始剤や着
色剤などの混合物を水中に懸濁し、重合を行ないトナー
を得る方法である。The suspension polymerization method is generally a method in which a mixture of a polymerizable monomer, a polymerization initiator, a colorant and the like is suspended in water to carry out polymerization to obtain a toner.
本発明によるトナーの製法の一例は、分散剤とアニオン
系界面活性剤とを水または水を主体とする水分散媒中に
存在せしめ、この分散媒中に、重合性単量体、電荷調整
剤、重合開始剤、着色剤及びその他の添加剤より成るト
ナー組成物を分散懸濁せしめ、重合を行ない、得られた
重合性粉末粒子を希酸処理し、分散剤を水に可溶化せし
め、水洗して分散剤を除去する主要工程を経て得ること
ができる。An example of the method for producing a toner according to the present invention is that a dispersant and an anionic surfactant are allowed to exist in water or an aqueous dispersion medium containing water as a main component, and the polymerizable monomer and the charge control agent are contained in the dispersion medium. A toner composition comprising a polymerization initiator, a colorant and other additives is dispersed and suspended, polymerization is performed, the obtained polymerizable powder particles are treated with a dilute acid, the dispersant is solubilized in water, and washed with water. It can be obtained through the main steps of removing the dispersant.
上記界面活性剤の例としてはアニオン系界面活性剤が挙
げられ、その具体例としては、ドデシルベンゼンスルホ
ン酸ナトリウム、テトラデシル硫酸ナトリウム、ペンタ
デシル硫酸ナトリウム、オクチル硫酸ナトリウムが挙げ
られる。Examples of the surfactant include anionic surfactants, and specific examples thereof include sodium dodecylbenzenesulfonate, sodium tetradecyl sulfate, sodium pentadecyl sulfate, and sodium octyl sulfate.
これら界面活性剤は１種又は２種以上を使用することが
できる。These surfactants may be used either individually or in combination of two or more.
分散剤としては第三リン酸カルシウム（以下TCPとい
う）を使用することが好ましい。As a dispersant, it is preferable to use tricalcium phosphate (hereinafter referred to as TCP).
他に、TCPと塩化カルシウムとの付加生成物Ca3(PO4)2′
Ca(OH)2や各種の正リン酸塩、ピロリン酸塩、ポリリン
酸塩などを使用することができ、これら金属塩の例には
Ca,Mg,Ba,Fe,Srなどの塩が挙げられる。In addition, the addition product of TCP and calcium chloride Ca 3 (PO 4 ) 2 ′
Ca (OH) 2 and various orthophosphates, pyrophosphates, polyphosphates, etc. can be used. Examples of these metal salts are
Examples include salts of Ca, Mg, Ba, Fe, Sr and the like.
これら分散剤は１種又は２種以上を使用することができ
る。These dispersants may be used alone or in combination of two or more.
上記重合性単量体の例としては、次のものが挙げられ、
これらを単独あるいは共重合の組合せで用いることがで
きる。Examples of the polymerizable monomer include the following,
These can be used alone or in combination of copolymerization.
スチレン、ｏ−メチルスチレン、ｍ−メチルスチレン、
ｐ−メチルスチレン、α−メチルスチレン、ｐ−メトキ
シスチレン、ｐ−tertブチルスチレン、ｐ−フエニルス
チレン、ｏ−クロルスチレン、ｍ−クロルスチレン、ｐ
−クロルスチレン等のスチレン系モノマー；アクリル酸
メチル、アクリル酸エチル、アクリル酸ｍ−ブチル、ア
クリル酸イゾブチル、アクリル酸ドデシル、アクリル酸
ステアリル、アクリル酸２−エチルヘキシル、メタクリ
ル酸メチル、メタクリル酸エチル、メタクリル酸プロピ
ル、メタクリル酸ｎ−ブチル、メタクリル酸イソブチ
ル、メタクリル酸ｎ−オクチル、メタクリル酸ドデシ
ル、メタクリル酸２−エチルヘキシル、メタクリル酸ス
テアリル等のアクリル酸あるいはメタクリル酸系セノマ
ー；エチレン、プロピレン、ブチレン、塩化ビニル、酢
酸ビニル、アクリロニトリル 電荷調整の目的で使用される電荷調整剤には当分野で電
荷調整剤と呼ばれている染料を用いることができ、目的
に応じて極性あるいは極性用の染料を使い分けるこ
とができる。Styrene, o-methylstyrene, m-methylstyrene,
p-methylstyrene, α-methylstyrene, p-methoxystyrene, p-tert-butylstyrene, p-phenylstyrene, o-chlorostyrene, m-chlorostyrene, p
-Styrene-based monomers such as chlorostyrene; methyl acrylate, ethyl acrylate, m-butyl acrylate, isobutyl acrylate, dodecyl acrylate, stearyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, ethyl methacrylate, methacryl Propyl acid, n-butyl methacrylate, isobutyl methacrylate, n-octyl methacrylate, dodecyl methacrylate, 2-ethylhexyl methacrylate, stearyl methacrylate, and other acrylic acid or methacrylic acid-based senomers; ethylene, propylene, butylene, vinyl chloride. , Vinyl acetate, acrylonitrile As the charge control agent used for the purpose of charge control, a dye called a charge control agent in the art can be used, and a polar or polar dye is used depending on the purpose. be able to.
重合開始剤（ラジカル開始剤）としては、例えば、ベン
ゾイルパーオキサイド、ラウロイルパーオキサイド、ス
テアリルパーオキサイドのようなパーオキサイド系開始
剤や2,2′−アゾビスイソブチロニトリル、2,2′−アゾ
ビス−（2,4-ジメチルバレロニトリル）のようなアゾビ
ス系開始剤が用いられる。Examples of the polymerization initiator (radical initiator) include peroxide initiators such as benzoyl peroxide, lauroyl peroxide, and stearyl peroxide, and 2,2′-azobisisobutyronitrile, 2,2′- Azobis-based initiators such as azobis- (2,4-dimethylvaleronitrile) are used.
着色剤の代表例にはカーボンブラツクがあげられる。A typical example of the colorant is carbon black.
その他の添加剤として、例えば離型剤として知られてい
る低分子量オレフイン重合体や磁性着色剤などを用いる
ことができる。As other additives, for example, a low molecular weight olefin polymer known as a release agent, a magnetic colorant, or the like can be used.
懸濁重合法により本発明に係るトナーを得る場合の界面
活性剤と分散剤との混合比率(A)／(B)は、２０／１００
０〜１００／１０００好ましくは６０／１０００〜８０
／１０００である。When the toner according to the present invention is obtained by the suspension polymerization method, the mixing ratio (A) / (B) of the surfactant and the dispersant is 20/100.
0-100 / 1000, preferably 60 / 1000-80
/ 1000.
この(A)／(B)が２０／１０００以下では得られるトナー
が完全球形に近く、又１００／１０００以上では分散が
くずれ凝集及び洗浄が困難となり帯電量が低下したりす
る。If this (A) / (B) is 20/1000 or less, the toner obtained is close to a perfect sphere, and if it is 100/1000 or more, the dispersion deteriorates and aggregation and washing become difficult and the charge amount decreases.
上記のごとく、界面活性剤と分散剤との比率を特定比率
とすることにより、トナー表面に従来トナーと異なり凹
凸が形成され、かつ、その粒子形状が完全球形でなくじ
やがいもの様に歪みを有したトナーが得られる。As described above, by setting the ratio of the surfactant to the dispersant to be a specific ratio, unevenness is formed on the toner surface unlike the conventional toner, and the particle shape is not a perfect spherical shape and distorts like a wrinkle-like thing. A toner having
次に、本発明の実施例を示す。 Next, examples of the present invention will be described.
製造例１ トナー組成物として、カーボンブラツク（キヤボツト社
製モーガルＬ）５部、スチレン７０部、ｎ−ブチルアク
リレート３０部、電荷調整剤（保土谷化学社製スピロン
ブラツクＴＲＨ）２部、アゾビスイソブチロニトリル２
部及びあらかじめ微細化処理したポリプロピレンワツク
ス（三洋化成社製ビスコール５５０Ｐ）５部を調整し、
その３００ｇを第三リン酸カルシウム３部、ドデシルベ
ンゼンスルホン酸ソーダ0.2部、蒸留水１００部からな
る組成の分散媒１０００ｇと混合し、ホモミキサーにて
3000rpm、１分間の高速撹拌にて５〜２０μｍの油滴を
得た。次に、このものを通常の撹拌翼を備えている２
のオートクレーブに移し、６５℃にて８時間懸濁重合を
ない反応を完結させた。得られたトナーを水洗、乾燥し
た後、風力分級機にて細粒、粗粒をカツトし、平均粒径
１２μｍの凹凸があり、かつ、歪んでいるトナーを得
た。このトナーの粒径分布は５μ以下１％、２０μ以上
０％なる分布であつた。また、このトナーのイメージア
ナライザー（×４００倍、以下同じ）による形状係数の
測定結果を第１表に示す。Production Example 1 As a toner composition, 5 parts of carbon black (Mogar L manufactured by KYOTOBOT Co., Ltd.), 70 parts of styrene, 30 parts of n-butyl acrylate, 2 parts of charge control agent (Spilon Black TRH manufactured by Hodogaya Chemical Co., Ltd.), Azobis Isobutyronitrile 2
Parts and 5 parts of polypropylene wax (Viscole 550P manufactured by Sanyo Kasei Co., Ltd.) that has been subjected to microfabrication in advance,
300 g thereof was mixed with 1000 g of a dispersion medium composed of 3 parts of tricalcium phosphate, 0.2 part of sodium dodecylbenzenesulfonate and 100 parts of distilled water, and then mixed with a homomixer.
High-speed stirring at 3000 rpm for 1 minute gave oil droplets of 5 to 20 μm. Next, this one is equipped with a normal stirring blade 2
The reaction mixture was transferred to an autoclave (1), and the reaction without suspension polymerization was completed at 65 ° C for 8 hours. The obtained toner was washed with water and dried, and then fine and coarse particles were cut with an air classifier to obtain a toner having irregularities with an average particle diameter of 12 μm and being distorted. The particle size distribution of this toner was 5 μ or less 1% and 20 μ or more 0%. Table 1 shows the measurement results of the shape factor of this toner by an image analyzer (× 400 times, the same applies hereinafter).
製造例２ 製造例１においてドデシルベンゼンスルホン酸ソーダを
0.024部とした以外は製造例１と同様にして反応を行な
い、水洗、乾燥後、風力分級機にて細粒、粗粒をカツト
し、平均粒径１２μｍのトナーを得た。このトナーは、
光学顕微鏡（×７５０倍率）観察によると、ほとんど球
形であつた。このトナーの粒径分布は製造例１のトナー
と同様であつた。このトナーのイメージアナライザーに
よる形状係数の測定結果を第１表に示す。Production Example 2 In Production Example 1, sodium dodecylbenzenesulfonate was added.
The reaction was carried out in the same manner as in Production Example 1 except that the amount was changed to 0.024 part. After washing with water and drying, fine particles and coarse particles were cut with an air classifier to obtain a toner having an average particle diameter of 12 μm. This toner is
According to observation with an optical microscope (× 750 magnification), it was almost spherical. The particle size distribution of this toner was similar to that of the toner of Production Example 1. Table 1 shows the measurement results of the shape factor of this toner by an image analyzer.
製造例３ 製造例１と同様処方にてトナーを多量に別途製造した。
これを、常法にて、溶融混合、粉砕し、平均粒径１５μ
ｍのトナーを得、このものを風力分級機にて細粒、粗粒
をカツトし、平均粒径１２μｍのトナーを得た。このト
ナーの粒径分布は製造例１に示すトナーと同様であつ
た。Production Example 3 A large amount of toner was separately produced by the same formulation as in Production Example 1.
This is melt-mixed and pulverized by an ordinary method to give an average particle size of 15 μ
m toner was obtained, and this was cut with an air classifier to cut fine particles and coarse particles to obtain a toner having an average particle diameter of 12 μm. The particle size distribution of this toner was similar to that of the toner shown in Production Example 1.
このトナーのイメージアナライザーによる形状係数の測
定結果を第１表に示す。Table 1 shows the measurement results of the shape factor of this toner by an image analyzer.
実施例１ 製造例１で得られたトナーを用いて画像評価を行なつ
た。東芝社製レオドライ４５１５機器を使用して行な
い、キヤリアに同和鉄粉社製ＤＳＰ１２８を用い、トナ
ー／キヤリア比を４／１００とした。その結果、当該ト
ナーは５０００枚連続コピーにおいてもカブリは認めら
れず、帯電量も初期１８μｃ／ｇ、５０００枚目1
7.5μｃ／ｇと安定しており、また、クリーニング性も
何ら支障がなかつた。 Example 1 Image evaluation was performed using the toner obtained in Production Example 1. This was carried out using a Rhodry 4515 device manufactured by Toshiba Corporation, and DSP128 manufactured by Dowa Iron Powder Co., Ltd. was used for the carrier, and the toner / carrier ratio was set to 4/100. As a result, no fog was observed even after continuous copying of 5,000 sheets of the toner, and the charge amount was 18 μc / g at the initial stage and 5,000 sheets on the 1st sheet.
It was stable at 7.5 μc / g, and the cleaning property was not hindered.
比較例１ 製造例２で得られたトナーを用い、同様にトナー特性を
テストしたところ、当該トナーはトナー飛散等によりカ
ブリが目立ち、画質を乱すものであつた。また、クリー
ニングが充分になされないため１００枚目よりクリーニ
ング不良による線が全面に現われた。帯電量も初期１
４μｃ／ｇ、５０００枚目１０μｃ／ｇであつた。Comparative Example 1 When the toner obtained in Production Example 2 was used and the toner properties were tested in the same manner, fog was noticeable due to toner scattering and the like, and the image quality was disturbed. In addition, since the cleaning was not sufficiently performed, a line due to defective cleaning appeared on the entire surface from the 100th sheet. Initial charge of 1
It was 4 μc / g, and 5000 μm was 10 μc / g.
比較例２ 製造例３で得られたトナーを用い、同様にトナー特性を
テストしたところ、当該トナーはクリーニング性は良好
であつたが、帯電量のバラツキが目立ち、１７μｃ／
ｇ±５μｃ／ｇの変動があり、カブリが認められた。Comparative Example 2 Using the toner obtained in Production Example 3, the toner characteristics were tested in the same manner. As a result, the toner had good cleaning property, but the variation in charge amount was noticeable, and 17 μc /
There was a fluctuation of g ± 5 μc / g, and fog was recognized.
本発明によれば、帯電における立ち上りが早く、帯電量
が安定し、多数枚の連続コピーでもカブリの発生が認め
らず、画質が鮮明で、クリーニング性も良く、かつ、ト
ナーとして要求されるその他の優れた特性を有する静電
荷像現像用トナーを得ることができた。According to the present invention, the rise in charging is fast, the amount of charge is stable, the occurrence of fog is not recognized even in the continuous copying of a large number of sheets, the image quality is clear, the cleaning property is good, and it is required as a toner. It was possible to obtain a toner for developing an electrostatic charge image having excellent characteristics.
Claims (1)
用トナー。1. Shape factor SF1 And shape factor SF2 , SF1 has a value of 120 to 180 and SF2 has a value of 110 to 130. An electrostatic charge image developing toner having irregularities formed on the surface and having distortion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60121568A JPH0629979B2 (en) | 1985-06-06 | 1985-06-06 | Toner for electrostatic image development |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60121568A JPH0629979B2 (en) | 1985-06-06 | 1985-06-06 | Toner for electrostatic image development |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61279864A JPS61279864A (en) | 1986-12-10 |
| JPH0629979B2 true JPH0629979B2 (en) | 1994-04-20 |
Family
ID=14814452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60121568A Expired - Lifetime JPH0629979B2 (en) | 1985-06-06 | 1985-06-06 | Toner for electrostatic image development |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0629979B2 (en) |
Families Citing this family (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0731419B2 (en) * | 1987-03-24 | 1995-04-10 | コニカ株式会社 | Method for producing toner for heat fixing type electrostatic image development |
| JPS63235953A (en) * | 1987-03-24 | 1988-09-30 | Konica Corp | One-component developer |
| JPH0738079B2 (en) * | 1987-03-24 | 1995-04-26 | コニカ株式会社 | Electrostatic latent image development method |
| JPS63235954A (en) * | 1987-03-24 | 1988-09-30 | Konica Corp | Electrostatic image developing heat-fixable toner |
| JPH01172972A (en) * | 1987-12-28 | 1989-07-07 | Ricoh Co Ltd | Toner for developing electrostatic charge image |
| JPH0820766B2 (en) * | 1989-03-29 | 1996-03-04 | バンドー化学株式会社 | Toner for developing electrostatic latent image and manufacturing method thereof |
| JPH04102861A (en) * | 1990-08-22 | 1992-04-03 | Hitachi Metals Ltd | Electrostatic charge image developing toner |
| JP2670468B2 (en) * | 1991-03-22 | 1997-10-29 | キヤノン株式会社 | Developer for developing electrostatic image, image forming method and heat fixing method |
| JP2880356B2 (en) * | 1991-10-30 | 1999-04-05 | 沖電気工業株式会社 | Image forming apparatus and image forming method |
| JPH06295099A (en) * | 1993-02-10 | 1994-10-21 | Hitachi Ltd | Toner, production of the toner and developing device using the toner |
| JP3066943B2 (en) * | 1993-11-29 | 2000-07-17 | キヤノン株式会社 | Image forming method |
| EP0715230B1 (en) * | 1994-11-28 | 2001-10-10 | Canon Kabushiki Kaisha | Image forming method |
| US5774771A (en) * | 1995-02-10 | 1998-06-30 | Canon Kabushiki Kaisha | Image forming method and apparatus using a particular toner |
| DE69630723T2 (en) * | 1995-02-10 | 2004-12-02 | Canon K.K. | Imaging method and apparatus |
| EP0744672B1 (en) * | 1995-05-23 | 2003-01-02 | Canon Kabushiki Kaisha | Image forming apparatus and method employing an intermediate transfer member |
| EP0791861B1 (en) * | 1996-02-20 | 2003-05-07 | Canon Kabushiki Kaisha | Image forming method |
| US6033817A (en) * | 1996-07-31 | 2000-03-07 | Canon Kabushiki Kaisha | Toner for developing electrostatic image and image forming method |
| JP3595631B2 (en) * | 1996-07-31 | 2004-12-02 | キヤノン株式会社 | Toner for developing electrostatic images |
| US6393250B1 (en) * | 1996-11-29 | 2002-05-21 | Canon Kabushiki Kaisha | Cleaning apparatus and image forming apparatus |
| EP0875795B1 (en) * | 1997-04-30 | 2002-03-06 | Canon Kabushiki Kaisha | Image forming method featuring a residual charge control property resulting from a selected toner formulation |
| JP3644208B2 (en) * | 1997-08-21 | 2005-04-27 | 富士ゼロックス株式会社 | Electrostatic latent image developing toner, electrostatic latent image developer, and image forming method |
| JP4000209B2 (en) * | 1997-12-17 | 2007-10-31 | 富士ゼロックス株式会社 | Toner for electrostatic latent image developer, method for producing toner for electrostatic latent image developer, electrostatic latent image developer, and image forming method |
| US6528224B2 (en) | 1998-04-02 | 2003-03-04 | Canon Kk | Toner for developing electrostatic images and image forming method |
| DE69926685T2 (en) | 1998-05-13 | 2006-01-19 | Canon K.K. | Toner and imaging process |
| US6447969B1 (en) | 1999-06-02 | 2002-09-10 | Canon Kabushiki Kaisha | Toner and image forming method |
| US6613490B2 (en) | 2000-10-31 | 2003-09-02 | Canon Kabushiki Kaisha | Toner, image forming method and process-cartridge |
| JP2002221826A (en) | 2001-01-29 | 2002-08-09 | Konica Corp | Toner, toner producing method and image forming method |
| US6544705B2 (en) * | 2001-05-18 | 2003-04-08 | Dpi Solutions, Inc. | Micro-serrated, dyed color toner particles and method of making same |
| JP2004198539A (en) * | 2002-12-16 | 2004-07-15 | Ricoh Co Ltd | Developing device, image forming apparatus, and process cartridge |
| JP2004271862A (en) * | 2003-03-07 | 2004-09-30 | Ricoh Co Ltd | Toner and image forming apparatus |
| EP1455238B1 (en) * | 2003-03-07 | 2009-04-29 | Ricoh Company, Ltd. | Toner, developer and image forming apparatus |
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Also Published As
| Publication number | Publication date |
|---|---|
| JPS61279864A (en) | 1986-12-10 |
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