JPS6115153A - Developer for positive charge image - Google Patents
Developer for positive charge imageInfo
- Publication number
- JPS6115153A JPS6115153A JP59134097A JP13409784A JPS6115153A JP S6115153 A JPS6115153 A JP S6115153A JP 59134097 A JP59134097 A JP 59134097A JP 13409784 A JP13409784 A JP 13409784A JP S6115153 A JPS6115153 A JP S6115153A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- carrier
- developer
- powder
- rubbing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- G03G9/097—Plasticisers; Charge controlling agents
- G03G9/09708—Inorganic compounds
- G03G9/09716—Inorganic compounds treated with organic compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Developing Agents For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は電子写真法で用いる正電荷像現像用の現像剤に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a developer for developing positively charged images used in electrophotography.
周知のようにPPC電子写真においては光導電体面に所
要の静電荷潜像を形成し、この静電潜像上にこれと反対
の電荷を有するトナーを含む現像剤を接触させトナー画
像を作製したのち、転写紙に転写、定着して可視画像を
得る。As is well known, in PPC electrophotography, a required electrostatic latent image is formed on the surface of a photoconductor, and a developer containing a toner having an opposite charge is brought into contact with this electrostatic latent image to produce a toner image. The image is then transferred to transfer paper and fixed to obtain a visible image.
ところで、このようなトナー転写型電子写真法において
は、転写工程後感光体上に残留したトナーは感光体を再
使用するためにクリーニングしなければならない。この
クリーニングにはブラシ、ブレード、磁気ブラシなどを
使った方法や特殊転写材を使った方法がある。このうち
ブラシクリーニングは原理的には直径10cm位の円筒
状ブラシを高速回転させ感光体上の残留トナーをはたき
落す方法であり、ゼログラフィーによる複写機が開発さ
れた当初から長い間利用されている。By the way, in such a toner transfer type electrophotographic method, the toner remaining on the photoreceptor after the transfer process must be cleaned in order to reuse the photoreceptor. This cleaning can be done using a brush, blade, magnetic brush, or a special transfer material. Brush cleaning is a method in which a cylindrical brush with a diameter of about 10 cm is rotated at high speed to brush off residual toner on the photoreceptor, and has been used for a long time since the development of xerographic copying machines. .
しかしながらこのブラシクリーニングは、他のクリーニ
ング方法と同様、感光体表面への力学的負荷が避けられ
ず、しかも感光体表面には繰り返し使用によりトナー被
ll!(フィルミング)が形成され、クリーニング不良
を生じ電子写真性能を低下させるものであった。However, like other cleaning methods, this brush cleaning inevitably places a mechanical load on the surface of the photoreceptor, and moreover, the surface of the photoreceptor gets coated with toner due to repeated use! (filming) was formed, resulting in poor cleaning and deterioration of electrophotographic performance.
そのためブラシクリーニング性を向上させるために、従
来、マシンおよびトナー材料面より多くの試みがなされ
てきた。すなわちマシンザイドからは感光体表面へのト
ナーフィルミングを防止するだめに、ファーを長くする
。ブラシの回転数を早くする、ファーの材料を工夫する
等の手段が構じられたが、その一方で感光体表面をきす
っけ、好ましい成果が得られなかった。Therefore, many attempts have been made in the past to improve brush cleaning performance in terms of machines and toner materials. In other words, the fur of machinzide is made longer in order to prevent toner filming on the surface of the photoreceptor. Measures have been taken, such as increasing the number of rotations of the brush and changing the material of the fur, but these methods scratch the surface of the photoreceptor, and the desired results have not been obtained.
又、トナー材料面からはトナーの帯電位や固定抵抗を変
動したり、粒子径を大きくしたり、流動性を向上するこ
とによりクリーニング性の改良が試みられたが、その反
面、画質の低下、トナー飛散等を生し電子写真性能を総
合的に満足する手段を欠くものであった。In addition, attempts have been made to improve the cleaning properties of toner materials by varying the charge potential and fixed resistance of the toner, increasing the particle size, and improving fluidity. This caused toner scattering, etc., and lacked a means to satisfy overall electrophotographic performance.
本発明は上記の事情l″−鑑みてなされたもので、鉄粉
キャリヤーとの摩擦で正に帯電する化合物で処理した金
属酸化物粉末を上記キャリヤーとの摩擦で負に帯電する
トナーに外部混合することを特徴とする正電荷像用現像
剤を提供するものであり、これによりトナー材料面から
ブラシクリーニング性を改良し、すぐれた画質を得るこ
とを可能ならしめるものである。The present invention has been made in view of the above-mentioned circumstances. Metal oxide powder treated with a compound that becomes positively charged by friction with an iron powder carrier is externally mixed into a toner which becomes negatively charged by friction with the carrier. The object of the present invention is to provide a developer for positively charged images, which is characterized by the following characteristics, and thereby improves brush cleaning properties from the viewpoint of toner materials and makes it possible to obtain excellent image quality.
本発明でいう鉄粉キャリヤーとの摩擦で正に帯電する化
合物で処理した金属酸化物粉末とは、シリカ、アルミナ
、二酸化チタン、チタンノ・リウム、酸化亜鉛、ケイ砂
、クレー、酸化鉄、フ■−ライトなどの金属酸化物粉末
の表面をアミノシラン、ヒニルビリシン、アミノピリジ
ン等の正帯電性化合物で処理したものである。この中で
もとく(こシリカにアミノシランもしくはアミノシラン
とへセリメチルジシラザン(HMDS)の混成物で表面
処理したものが好適である。In the present invention, metal oxide powder treated with a compound that becomes positively charged by friction with an iron powder carrier includes silica, alumina, titanium dioxide, titanium oxide, zinc oxide, silica sand, clay, iron oxide, fluoride, etc. - The surface of a metal oxide powder such as light is treated with a positively charged compound such as aminosilane, hinylbilycine, or aminopyridine. Among these, silica surface-treated with aminosilane or a mixture of aminosilane and helimethyldisilazane (HMDS) is preferred.
金属酸化物粉末の表面処理に用いるアミノンランはいわ
ゆるアミノファンクシヨリ−ルシランで一般式、
m5iYn
(Xはアルコキシ基又はクロル原子、鏑は1〜3の整数
、Yは1級〜3級アミノ基を有する炭化水素基、口は3
〜lの整数である)で示され、例えば次のような化合物
CH3
□
82N−CH2C)(2N)(C)(2CH2C)12
s ヒ−(OCI−13)2
82N−CONI(−CH2C)12C)I2−3i−
(OC2H6)3
H2N CH2CH2CH25I (OCH2CH3
)al−12Nc)I2C82N)lcH2c)]2C
H2Si(OCH3)3
なとか挙げられ、これらは1種又は2種属上の混合系て
用いてもよい。Aminonlan used for surface treatment of metal oxide powder is a so-called aminofunxiolyl silane, and has the general formula m5iYn (X is an alkoxy group or a chlorine atom, ``Kabura'' is an integer from 1 to 3, and Y is a primary to tertiary amino group. Hydrocarbon group with 3 openings
), for example, the following compound CH3 □ 82N-CH2C)(2N)(C)(2CH2C)12
s H-(OCI-13)2 82N-CONI(-CH2C)12C)I2-3i-
(OC2H6)3 H2N CH2CH2CH25I (OCH2CH3
)al-12Nc)I2C82N)lcH2c)]2C
Examples include H2Si(OCH3)3, and these may be used alone or in a mixed system of two types.
かくして得られたアミノシラン処理の金属酸化物粉末は
著しく強い均一な正帯電を有するものであり、これをキ
ャリヤー鉄粉との摩擦で負に帯電するトナーとともに、
ヘンシェルミキサー等機械的手段を用いて混合すること
により負帯電トナーの表面に正帯電の微粉末か担持され
た状態になる。The aminosilane-treated metal oxide powder thus obtained has an extremely strong uniform positive charge, and this is combined with the toner, which becomes negatively charged by friction with the carrier iron powder.
By mixing using a mechanical means such as a Henschel mixer, positively charged fine powder is supported on the surface of the negatively charged toner.
この場合の混合比は負帯電トナー100瓜量部に対し正
帯電微粉末0.05〜2%、好ましくは0.1〜0.5
%で混合されるが、この際重要なことは、正帯電微粉末
粒子により表面がおおわれたl・ナー粒子の摩擦帯電極
性が、結果的にキャリヤー鉄粉との摩擦で負帯電性を維
持することであり、これlこよりセレン等の感光体上の
正電荷像の現像がなされる。又、キャリヤーとの摩擦で
負に帯電するトナーとは、通常の二成分系現像剤の負帯
電性トナー全てが対象となる。すなわち結着剤樹脂とし
てはアクリル系樹脂、スチレンアクリル共重合体、ポリ
エステル、エポキシ樹脂等が使用され、これに負帯電性
を有する各種の含金染料、カーボンブラックその他の着
色顔料や添加剤を配合して、溶融混練、粉砕して得られ
る。In this case, the mixing ratio is 0.05 to 2%, preferably 0.1 to 0.5%, of the positively charged fine powder to 100 parts of the negatively charged toner.
%, but what is important at this time is that the frictionally charged polarity of the L-ner particles whose surfaces are covered with positively charged fine powder particles maintains their negative chargeability through friction with the carrier iron powder. This is the reason why a positively charged image on a photoreceptor such as selenium is developed. Further, the toner that becomes negatively charged due to friction with the carrier includes all negatively charged toners of ordinary two-component developers. In other words, acrylic resin, styrene-acrylic copolymer, polyester, epoxy resin, etc. are used as the binder resin, and various negatively charged metal-containing dyes, carbon black, and other coloring pigments and additives are blended with this resin. It is obtained by melt-kneading and pulverizing.
正帯電粒子により表面がおおわれたトナーは、通常二成
分現像剤に使用される導電性キャリヤー鉄粉あるいはコ
ーティングキャリヤーと混合され、本発明の正電荷像用
現像剤を得ることができる。The toner whose surface is covered with positively charged particles is mixed with a conductive carrier iron powder or a coating carrier that is normally used in two-component developers to obtain the positively charged image developer of the present invention.
かくして得られた本発明の現像剤をブラシクリーニング
機構を有するPPC電子複写機に適用したところ、感光
体表面のクリーニング性はきわめて良好でトナーのフィ
ルミングらなく、現像に際して常にカブリのない鮮明な
画像を得ることができた。When the thus obtained developer of the present invention was applied to a PPC electronic copier having a brush cleaning mechanism, the cleaning performance of the photoreceptor surface was extremely good, there was no toner filming, and clear images without fog were always produced during development. was able to obtain.
又、本発明は現像剤自体にクリーニング性向りの機能が
付与されているので、ファーブラシの材質やブラシの回
転条件等の選択許容範囲も広がり、クリーニングシステ
ムとしての利点も多い。Further, in the present invention, since the developer itself has a cleaning function, the range of selection of the material of the fur brush, the rotation conditions of the brush, etc. is widened, and there are many advantages as a cleaning system.
次に本発明の実施例および比較例を記載する。Next, Examples and Comparative Examples of the present invention will be described.
実施例
上記組成分をエクストルーダーにて溶融混練後、粉砕分
級して平均粒子径14μmであって、ブローオフ帯電量
が一24μc/gの負帯電性l・ナーを作成した。該ト
ナー100M量部に対しアミノシランとHMDSで表面
処理したBET表面積約130nt/gの正帯電シリカ
微粉末(アエロジルRA 20011、日本アエロジル
社製)0.2重量部をヘンシェルミキザーにて混合し、
正帯電シリカが表面積に担持された負帯電トナーを得た
。このトナー6重量部を導電性キャリヤー鉄分(T E
F V2O0/:+00、日本鉄粉社製) 100重
量部と混合することによリブローオフ帯電量が一21μ
c/gの本発明の現像剤を得た。EXAMPLE The above components were melt-kneaded in an extruder and then pulverized and classified to prepare a negatively chargeable l-ner having an average particle diameter of 14 μm and a blow-off charge amount of 124 μc/g. 0.2 parts by weight of positively charged silica fine powder (Aerosil RA 20011, manufactured by Nippon Aerosil Co., Ltd.) having a BET surface area of about 130 nt/g that has been surface-treated with aminosilane and HMDS is mixed with 100 M parts of the toner using a Henschel mixer;
A negatively charged toner having positively charged silica supported on its surface area was obtained. 6 parts by weight of this toner is mixed with conductive carrier iron (TE
By mixing with 100 parts by weight of F V2O0/: +00, manufactured by Nippon Tetsuko Co., Ltd., the rib blow-off charge amount is 121μ
A developer of the present invention of c/g was obtained.
この現像剤をセレン感光体、ブラシクリーニング機構を
有するPPC電子複写機に適用し、50.000枚以上
の連続コピーをしたところ、カブリ、地汚れのない鮮明
な画像を維持することができた。さらにこの鮮明な画像
が感光体表面のクリーニング性向」二に起因づ−るもの
であることも確認された。When this developer was applied to a PPC electronic copying machine equipped with a selenium photoreceptor and a brush cleaning mechanism and more than 50,000 copies were made continuously, clear images without fogging or scumming could be maintained. Furthermore, it was confirmed that this clear image was due to the cleaning tendency of the surface of the photoreceptor.
比較例
上記組成分をエクストルーダーにて溶融混練後、粉砕分
級して、平均粒子径14(tm、ブローオフ帯電ik
−14ltc/g hナーヲ作製シタ。d h チー1
O0!量部に対しキャリヤー鉄粉との摩擦で強度に負に
帯電する疎水性シリツノ(ア]−ロシルR972、日本
アJ−ロシル社製)0.2重量部をヘンシエルミギサー
にて混合し、負帯電シリツノか表面に担持された負帯電
トナーを得た。このトナ−6瓜量部を導電性キャリヤー
鉄分(TEFV200/300)100重量部と混合す
ることによりブローオフ帯電量か一2luc/gの現像
剤を得た。Comparative Example The above components were melt-kneaded in an extruder, then pulverized and classified to obtain an average particle size of 14 (tm, blow-off charge ik
-14ltc/gh nawo production site. d h Chi 1
O0! 0.2 parts by weight of hydrophobic Silituno (A]-Rosil R972, manufactured by Japan AJ-Rosil Co., Ltd.), which is strongly negatively charged by friction with carrier iron powder, is mixed in a Henschel Migisser, A negatively charged toner supported on the surface of the negatively charged toner was obtained. By mixing 6 parts of this toner with 100 parts by weight of conductive carrier iron (TEFV200/300), a developer having a blow-off charge amount of 12 luc/g was obtained.
この現像剤をセレン感光体、ブラシクリーニング機構を
有するI) P C電子複写機に適用し連続コピーをお
こなったところ、初期画像は鮮明で良好な0のであった
が、5.000枚以上の繰返しコピーによりクリーニン
グ不良に起因する感光体表面・\のl−3−−フィルミ
ングが生じ、地汚れの多い不鮮明な画像を1ひた。When this developer was applied to an I)PC electronic copying machine with a selenium photoreceptor and a brush cleaning mechanism for continuous copying, the initial images were clear and good. During copying, filming occurred on the photoreceptor surface due to poor cleaning, resulting in an unclear image with a lot of scumming.
Claims (2)
処理した金属酸化物粉末を、上記キャリヤーとの摩擦で
負に帯電するトナーに外部混合することを特徴とする正
電荷像用現像剤。(1) A developer for positively charged images, characterized in that a metal oxide powder treated with a compound that becomes positively charged by friction with an iron powder carrier is externally mixed with a toner which becomes negatively charged by friction with the carrier. .
アミノシランであることを特徴とする特許請求の範囲第
1項記載の正電荷像用現像剤。(2) The developer for positively charged images according to claim 1, wherein the compound that becomes positively charged by friction with the iron powder carrier is aminosilane.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59134097A JPS6115153A (en) | 1984-06-30 | 1984-06-30 | Developer for positive charge image |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59134097A JPS6115153A (en) | 1984-06-30 | 1984-06-30 | Developer for positive charge image |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6115153A true JPS6115153A (en) | 1986-01-23 |
JPH0352857B2 JPH0352857B2 (en) | 1991-08-13 |
Family
ID=15120367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59134097A Granted JPS6115153A (en) | 1984-06-30 | 1984-06-30 | Developer for positive charge image |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6115153A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62258472A (en) * | 1986-05-01 | 1987-11-10 | Sharp Corp | Developer for electrostatic copying machine |
JPH01232355A (en) * | 1988-03-11 | 1989-09-18 | Mita Ind Co Ltd | Toner for developing electrostatic latent image |
US5024915A (en) * | 1988-11-17 | 1991-06-18 | Canon Kabushiki Kaisha | Positively chargeable developer |
JPH03170950A (en) * | 1989-11-30 | 1991-07-24 | Tomoegawa Paper Co Ltd | Toner for developing electrostatic charge image |
FR2699297A1 (en) * | 1992-12-16 | 1994-06-17 | Seiko Epson Corp | A method and system for developing a toner image. |
JP2001109185A (en) * | 1999-10-08 | 2001-04-20 | Mitsubishi Chemicals Corp | Electrostatic charge image developing toner |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52135739A (en) * | 1976-05-10 | 1977-11-14 | Toshiba Corp | Developing agent for electrostatic image |
JPS58216252A (en) * | 1982-06-11 | 1983-12-15 | Nippon Aerojiru Kk | Dry type toner |
JPS59143161A (en) * | 1983-02-07 | 1984-08-16 | Hitachi Metals Ltd | Toner particles for developing electrostatic latent image |
-
1984
- 1984-06-30 JP JP59134097A patent/JPS6115153A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52135739A (en) * | 1976-05-10 | 1977-11-14 | Toshiba Corp | Developing agent for electrostatic image |
JPS58216252A (en) * | 1982-06-11 | 1983-12-15 | Nippon Aerojiru Kk | Dry type toner |
JPS59143161A (en) * | 1983-02-07 | 1984-08-16 | Hitachi Metals Ltd | Toner particles for developing electrostatic latent image |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62258472A (en) * | 1986-05-01 | 1987-11-10 | Sharp Corp | Developer for electrostatic copying machine |
JPH01232355A (en) * | 1988-03-11 | 1989-09-18 | Mita Ind Co Ltd | Toner for developing electrostatic latent image |
US5024915A (en) * | 1988-11-17 | 1991-06-18 | Canon Kabushiki Kaisha | Positively chargeable developer |
JPH03170950A (en) * | 1989-11-30 | 1991-07-24 | Tomoegawa Paper Co Ltd | Toner for developing electrostatic charge image |
FR2699297A1 (en) * | 1992-12-16 | 1994-06-17 | Seiko Epson Corp | A method and system for developing a toner image. |
JP2001109185A (en) * | 1999-10-08 | 2001-04-20 | Mitsubishi Chemicals Corp | Electrostatic charge image developing toner |
Also Published As
Publication number | Publication date |
---|---|
JPH0352857B2 (en) | 1991-08-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |