JPS59166968A - Coated carrier - Google Patents
Coated carrierInfo
- Publication number
- JPS59166968A JPS59166968A JP58041161A JP4116183A JPS59166968A JP S59166968 A JPS59166968 A JP S59166968A JP 58041161 A JP58041161 A JP 58041161A JP 4116183 A JP4116183 A JP 4116183A JP S59166968 A JPS59166968 A JP S59166968A
- Authority
- JP
- Japan
- Prior art keywords
- carrier
- iron powder
- resin
- coated carrier
- coated
- 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
- G03G9/097—Plasticisers; Charge controlling agents
- G03G9/09708—Inorganic compounds
Abstract
Description
【発明の詳細な説明】
本発明は電子写真用現像剤の被覆キャリヤーに関し、詳
しくはZnOを含んだ樹脂でキャリヤーを被覆した被覆
キャリヤーに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coated carrier for an electrophotographic developer, and more particularly to a coated carrier in which the carrier is coated with a resin containing ZnO.
従来、電子写真法としては、米国特許第2297691
号、特公昭42−23910号、特公昭45−2474
8号公報に記載されているが、これらの方法は光導電層
上に一様に帯電を行い、原稿に応じた元像露ブCするこ
とにより光像部外の電荷を消滅させ潜像形成を行いトナ
ー粉末で現像し、必要に応じて紙又は布等に転写を行い
、加熱、加圧により永久定着するものである。Conventionally, as an electrophotographic method, US Pat. No. 2,297,691
No., Special Publication No. 42-23910, Special Publication No. 45-2474
These methods are described in Publication No. 8, but these methods uniformly charge the photoconductive layer and perform original image exposure C according to the original to eliminate the charge outside the optical image area and form a latent image. The image is developed with toner powder, transferred to paper or cloth as necessary, and permanently fixed by heating and pressure.
R像を現像する方法としては磁気ブラシ、カスケード、
ファーブラシタッチダウン、パウダークラウド等の各現
像方法により現1まし可視化される。Methods for developing R images include magnetic brush, cascade,
It can be visualized using various developing methods such as fur brush touchdown and powder cloud.
本発明に用いられる磁気ブラシ現像法においては、キャ
リヤー鉄粉とトナーを混合したものを現像剤として用い
る。この現像剤は多数枚連続複写はキャリヤー表面への
トナーの融着を誘う。もう一つは連続複写中にキャリヤ
ー表面が微細なトナーの蓄積により覆われる。In the magnetic brush development method used in the present invention, a mixture of carrier iron powder and toner is used as a developer. Continuous copying of a large number of sheets of this developer causes the toner to fuse to the surface of the carrier. Another is that during continuous copying, the carrier surface becomes covered with fine toner accumulation.
この様な劣化は通常1oooo枚〜20000枚付近で
起るため高速複写機では不向きである。Such deterioration usually occurs after 1000 to 20,000 sheets are printed, making it unsuitable for high-speed copying machines.
そこで前述の如き欠点を改良すべく提案されるものとし
て樹脂被覆を施したキャリヤーがある。Therefore, a carrier coated with a resin has been proposed to improve the above-mentioned drawbacks.
これらは前述した様な劣化を解決するものであるが、被
覆に用いる樹脂の多くが電気抵抗が高いために現像剤と
して用いた場合、エッヂ現象、画像濃度低下、若しくは
画像が出なくなることもあり好ましくな〜・。These are intended to solve the aforementioned deterioration, but many of the resins used for coating have high electrical resistance, so when used as a developer, they may cause edge phenomena, reduced image density, or no images. I like it...
このような現象を防ぐためには電気抵抗を調節しなけれ
ばならす、従来より使用されているものにカーボンブラ
ックがあるが、有り脂に分散させたカーボンブラックの
ぬれは悪く耐久性にも乏しい。In order to prevent such a phenomenon, the electrical resistance must be adjusted. Carbon black is a conventionally used material, but carbon black dispersed in grease has poor wettability and poor durability.
更には均一に分散してもカーボンのある局所では所望の
効果が得られるが、全体的に見ると抵抗の高低の部分が
生じる為好ましくない。Furthermore, even if the carbon is uniformly dispersed, the desired effect can be obtained in a localized area where the carbon is present, but when viewed as a whole, it is not preferable because there will be areas with high and low resistance.
本発明は上記の如き欠点を改良した電子写真現像用の被
覆キャリヤーを提供するもので、その目的とするところ
(は下記の如くである。The purpose of the present invention is to provide a coated carrier for electrophotographic development which improves the above-mentioned drawbacks, and its objects are as follows.
(1)被覆樹脂の抵抗を下げる
(2)現像剤の長寿命化を計る
(6)転写残りのトナーを再使用用能とする(ランニン
グコストを低T8せる)
(4)種々の環境下において画像が鮮明であることすな
わち本発明は、ギヤリヤーを導電性亜鉛華微粉末(Zn
O)を含有する被覆用樹脂で被覆した被覆キャリヤーに
ある。(1) Lower the resistance of the coating resin (2) Extend the life of the developer (6) Make the toner remaining after transfer available for reuse (reduce running costs to T8) (4) Under various environments In other words, the present invention is characterized by the fact that the image is clear.
The coating carrier is coated with a coating resin containing O).
本発明に用いる導電性亜鉛華(ZnO、)は粒径が10
μm、!−1,下で電気抵抗率が1oooΩ・cm以下
のものが良い。The conductive zinc white (ZnO) used in the present invention has a particle size of 10
μm! -1, the electrical resistivity is preferably 100Ω·cm or less.
通常樹脂のみの被覆キャリヤーはパエツヂ現象“が強く
、画像品質は%めで貧弱なものであるから電気抵抗の調
節をしなければならないことを既に述べたが、本発明の
導7L性亜鉛華(ZnO)の微粉末は被覆キャリヤー抵
抗調節として以下の効果を存する特徴がある。It has already been mentioned that carriers coated with resin only have a strong "Paedzage" phenomenon, and the image quality is poor in the % range, so the electrical resistance must be adjusted. The fine powder of ) has the following effects as a coated carrier resistance adjuster.
1、樹脂バインダーに対して極めて分散性が良い。1. Extremely good dispersibility in resin binders.
2、鉄粉キャリヤーへの接着強度を阻害しない。2. Does not inhibit adhesive strength to iron powder carrier.
この導電性亜鉛華微粉末(’Zn0)は被覆樹脂100
部に対して0.1重量部〜10重量部間で使用出来、好
ましくは0.6Mが:部〜7重量部が好ましい。This conductive zinc oxide fine powder ('Zn0) is coated with resin 100%.
0.1 to 10 parts by weight, preferably 0.6 to 7 parts by weight.
本発明に使用てる被覆樹脂と−しては公知の材料を含め
多数のものが使用されるが、代表的なものを示すと、フ
ッ素樹脂、各種フン化ポリマー、メラニン樹脂、キシレ
ンエポキシ樹脂、ポリフェニレンオキサイド樹脂、シリ
コーン樹脂、ポリエステル樹脂、ポリアミド樹脂、スチ
レン−塩化ビニル共重合体樹脂、スチレン−メタクリル
酸メチル共重合体樹脂、スチレン−メタクリル酸−ブチ
ル共重合樹脂、スチレンーブクジエン共重合樹脂等が使
用される。A large number of coating resins are used in the present invention, including known materials, but representative ones include fluororesins, various fluorinated polymers, melanin resins, xylene epoxy resins, and polyphenylene resins. Oxide resin, silicone resin, polyester resin, polyamide resin, styrene-vinyl chloride copolymer resin, styrene-methyl methacrylate copolymer resin, styrene-butyl methacrylate copolymer resin, styrene-bucdiene copolymer resin, etc. used.
本発明における被覆キャリヤーの製法は被チ樹脂と前述
の導電性亜鉛華微粉末を溶剤(トルエン。The method for producing the coated carrier in the present invention is to mix the resin to be coated and the above-mentioned conductive zinc white powder in a solvent (toluene).
キシレン、MEK)等に分散させ、この分散液にキャリ
ヤーを混合しスプレードライヤー法、流動化ベッド法等
によりキャリヤーに被覆し乾燥、造粒を行い、篩分して
通過分を被覆キャリヤーとしてイ史用する。xylene, MEK), etc., mix a carrier with this dispersion, coat it on the carrier by a spray dryer method, fluidized bed method, etc., dry it, granulate it, sieve it, and use the passed-through as a coated carrier. use
以下実施例に従い効果の具体例を示す。Specific examples of effects will be shown below according to Examples.
〔実施例1〕
平均粒径40μの海綿状鉄粉(日本鉄粉社製EFV )
1kgに対し、シリコーン樹脂ス(東しシリコーン製
S R−2406) 100 gと導電性亜鉛華(粒径
5μm、抵抗率100Ω・am)5gを混合した10係
トルエン溶液200 gを85〜90℃の条件下でWu
r s t e r型循環流動化ベッドにおいて鉄粉
表面にスプレーし、ついで200℃で炉内において20
分間硬化し、炉から取出し冷却したのち150メツシユ
のふるいに通して凝集体を除去し、低表面エネルギー樹
脂被覆キャリヤーを得た。[Example 1] Spongy iron powder with an average particle size of 40μ (EFV manufactured by Nippon Iron Powder Co., Ltd.)
For 1 kg, 200 g of a 10% toluene solution containing 100 g of silicone resin (SR-2406 manufactured by Toshi Silicone Co., Ltd.) and 5 g of conductive zinc white (particle size 5 μm, resistivity 100 Ω・am) was heated at 85 to 90°C. Under the conditions of Wu
The surface of the iron powder was sprayed in a circulating fluidized bed, and then heated in a furnace at 200°C for 20 minutes.
It was cured for minutes, removed from the oven, cooled, and passed through a 150 mesh sieve to remove agglomerates, yielding a low surface energy resin coated carrier.
このキャリヤーとNP8500スーパー用トナー8wt
φを混合した現1JJ mlを用いて、NP8500ス
ーパー材で画出しを行ったところ、荀られた画像はエッ
チ効果のない美しい画像であり、地肌部へのトナーの付
着は見られなかった、
〔実施例2〕
シリコーン樹脂スの変わりにエポキシ変性テフロンエナ
メルテフo ンS 954 101 (Du Pont
社製150gを用いた他は実施例1と同様に両出し実験
を行った結果、コピー画像は黒ベタ部が均一に現像され
たエッヂ効果のない美しい画像が得られた。This carrier and NP8500 super toner 8wt
When an image was printed using NP8500 super material using 1JJ ml of φ mixed, the resulting image was a beautiful image with no etch effect, and no toner adhesion to the background was observed. [Example 2] Epoxy-modified Teflon enamel Teflon S 954 101 (Du Pont
As a result of carrying out a double-extraction experiment in the same manner as in Example 1 except that a 150 g product manufactured by Co., Ltd. was used, a beautiful copy image was obtained in which the black solid areas were uniformly developed and there was no edge effect.
出願人 キャノン株式会社Applicant: Canon Co., Ltd.
Claims (1)
ヤーを被覆した電子写真用被覆キャリヤー −)Coated carrier for electrophotography in which the carrier is coated with a resin containing conductive zinc oxide fine powder (ZnO) -)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58041161A JPS59166968A (en) | 1983-03-11 | 1983-03-11 | Coated carrier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58041161A JPS59166968A (en) | 1983-03-11 | 1983-03-11 | Coated carrier |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS59166968A true JPS59166968A (en) | 1984-09-20 |
Family
ID=12600695
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58041161A Pending JPS59166968A (en) | 1983-03-11 | 1983-03-11 | Coated carrier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59166968A (en) |
Cited By (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61204643A (en) * | 1985-03-08 | 1986-09-10 | Ricoh Co Ltd | Carrier for electrostatic latent image developer |
JPH01209455A (en) * | 1988-02-17 | 1989-08-23 | Mitsubishi Kasei Corp | Electrophotographic developer |
JPH01211770A (en) * | 1988-02-19 | 1989-08-24 | Mitsubishi Kasei Corp | Electrophotographic developer |
JPH0286A (en) * | 1987-11-14 | 1990-01-05 | Ricoh Co Ltd | Electrophotographic copying device |
US5316882A (en) * | 1991-08-16 | 1994-05-31 | Eastman Kodak Company | Ferrite green beads and method of producing carrier particles |
JPH09152749A (en) * | 1995-11-29 | 1997-06-10 | Fuji Xerox Co Ltd | Carrier for electrostatic latent image developer, electrostatic latent image developer and image forming method |
US6500595B1 (en) | 1999-10-20 | 2002-12-31 | Ricoh Company, Ltd. | Carrier for electrophotographic developer, method for manufacturing the carrier, and coating liquid for the method |
US6904244B2 (en) | 2001-11-26 | 2005-06-07 | Ricoh Company, Ltd | Developing device for suppressing variations in bulk density of developer, and an image forming apparatus including the developing device |
US7020421B2 (en) | 2002-12-27 | 2006-03-28 | Ricoh Company, Ltd. | Magnetic carrier, two-component developer, development method, development device and image forming apparatus of electrophotography |
US7226713B2 (en) | 2003-01-31 | 2007-06-05 | Ricoh Company, Ltd. | Carrier, developer including the carrier and image forming apparatus using the developer |
US7381513B2 (en) | 2004-07-29 | 2008-06-03 | Ricoh Company, Ltd. | Carrier, developer, image forming method and process cartridge for electrostatic image development |
US7384719B2 (en) | 2004-03-02 | 2008-06-10 | Ricoh Company Ltd. | Carrier, developer including the carrier, and image forming apparatus using the developer |
EP1965261A2 (en) | 2007-03-02 | 2008-09-03 | Ricoh Company, Ltd. | Toner for developing electrostatic image, method for producing the toner, image forming method, image forming apparatus and process cartridge using the toner |
US7527908B2 (en) | 2005-04-06 | 2009-05-05 | Ricoh Company, Ltd. | Carrier, developer, developer container, image forming method and process cartridge |
US7553598B2 (en) | 2005-03-18 | 2009-06-30 | Ricoh Company, Limited | Electrophotographic carrier, developer, developer container, process cartridge, image forming apparatus and image forming method |
EP2090934A1 (en) | 2008-02-13 | 2009-08-19 | Ricoh Company, Ltd. | Carrier, two-component developer containing carrier and toner, and image forming method |
US7592116B2 (en) | 2004-11-12 | 2009-09-22 | Ricoh Company, Ltd. | Indium-containing carrier for electrophotography, developer using the same, and developer container |
US7687216B2 (en) | 2004-06-18 | 2010-03-30 | Sharp Kabushiki Kaisha | Two-component developer and two-component developing apparatus using the same |
US8247149B2 (en) | 2007-12-03 | 2012-08-21 | Ricoh Company, Ltd. | Electrophotographic developer carrier, electrophotographic developer, image forming method, process cartridge and image forming apparatus |
US8247150B2 (en) | 2008-09-17 | 2012-08-21 | Ricoh Company, Ltd. | Carrier for developing electrostatic latent image, two-component developer, supplemental developer, process cartridge, and image forming method |
US8263302B2 (en) | 2008-09-11 | 2012-09-11 | Ricoh Company, Ltd. | Carrier for electrophotography and two-component developer |
US8512929B2 (en) | 2009-09-14 | 2013-08-20 | Ricoh Company, Ltd. | Latent electrostatic image developing carrier, two-component developer and image forming method |
US10025214B2 (en) | 2015-12-28 | 2018-07-17 | Ricoh Company, Ltd. | Carrier, developing agent, image forming apparatus, image forming method, replenishment toner, and process cartridge |
US10444651B2 (en) | 2017-03-17 | 2019-10-15 | Ricoh Company, Ltd. | Carrier, developer, supplemental developer, image forming apparatus, image forming method, and process cartridge |
WO2021094957A1 (en) | 2019-11-15 | 2021-05-20 | Ricoh Company, Ltd. | Carrier for forming electrophotographic image, developer for forming electrophotographic image, electrophotographic image forming method, electrophotographic image forming apparatus, and process cartridge |
US11106150B2 (en) | 2018-11-22 | 2021-08-31 | Ricoh Company, Ltd. | Carrier, developer, method, and apparatus for forming electrophotographic image, and process cartridge |
-
1983
- 1983-03-11 JP JP58041161A patent/JPS59166968A/en active Pending
Cited By (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61204643A (en) * | 1985-03-08 | 1986-09-10 | Ricoh Co Ltd | Carrier for electrostatic latent image developer |
JPH0286A (en) * | 1987-11-14 | 1990-01-05 | Ricoh Co Ltd | Electrophotographic copying device |
JPH01209455A (en) * | 1988-02-17 | 1989-08-23 | Mitsubishi Kasei Corp | Electrophotographic developer |
JPH01211770A (en) * | 1988-02-19 | 1989-08-24 | Mitsubishi Kasei Corp | Electrophotographic developer |
US5316882A (en) * | 1991-08-16 | 1994-05-31 | Eastman Kodak Company | Ferrite green beads and method of producing carrier particles |
JPH09152749A (en) * | 1995-11-29 | 1997-06-10 | Fuji Xerox Co Ltd | Carrier for electrostatic latent image developer, electrostatic latent image developer and image forming method |
US6500595B1 (en) | 1999-10-20 | 2002-12-31 | Ricoh Company, Ltd. | Carrier for electrophotographic developer, method for manufacturing the carrier, and coating liquid for the method |
US7003235B2 (en) | 2001-11-26 | 2006-02-21 | Ricoh Company, Ltd. | Developing device for suppressing variations in bulk density of developer, and an image forming apparatus including the developing device |
US6904244B2 (en) | 2001-11-26 | 2005-06-07 | Ricoh Company, Ltd | Developing device for suppressing variations in bulk density of developer, and an image forming apparatus including the developing device |
US7020421B2 (en) | 2002-12-27 | 2006-03-28 | Ricoh Company, Ltd. | Magnetic carrier, two-component developer, development method, development device and image forming apparatus of electrophotography |
US7474867B2 (en) | 2002-12-27 | 2009-01-06 | Ricoh Company, Ltd. | Magnetic carrier, two-component developer, development method, development device and image forming apparatus of electrophotography |
US7226713B2 (en) | 2003-01-31 | 2007-06-05 | Ricoh Company, Ltd. | Carrier, developer including the carrier and image forming apparatus using the developer |
US7272347B2 (en) | 2003-01-31 | 2007-09-18 | Ricoh Company, Ltd. | Carrier, developer including the carrier, and image forming apparatus using the developer |
US7384719B2 (en) | 2004-03-02 | 2008-06-10 | Ricoh Company Ltd. | Carrier, developer including the carrier, and image forming apparatus using the developer |
US7687216B2 (en) | 2004-06-18 | 2010-03-30 | Sharp Kabushiki Kaisha | Two-component developer and two-component developing apparatus using the same |
US7381513B2 (en) | 2004-07-29 | 2008-06-03 | Ricoh Company, Ltd. | Carrier, developer, image forming method and process cartridge for electrostatic image development |
US7592116B2 (en) | 2004-11-12 | 2009-09-22 | Ricoh Company, Ltd. | Indium-containing carrier for electrophotography, developer using the same, and developer container |
US7553598B2 (en) | 2005-03-18 | 2009-06-30 | Ricoh Company, Limited | Electrophotographic carrier, developer, developer container, process cartridge, image forming apparatus and image forming method |
US7527908B2 (en) | 2005-04-06 | 2009-05-05 | Ricoh Company, Ltd. | Carrier, developer, developer container, image forming method and process cartridge |
EP1965261A2 (en) | 2007-03-02 | 2008-09-03 | Ricoh Company, Ltd. | Toner for developing electrostatic image, method for producing the toner, image forming method, image forming apparatus and process cartridge using the toner |
US8247149B2 (en) | 2007-12-03 | 2012-08-21 | Ricoh Company, Ltd. | Electrophotographic developer carrier, electrophotographic developer, image forming method, process cartridge and image forming apparatus |
EP2090934A1 (en) | 2008-02-13 | 2009-08-19 | Ricoh Company, Ltd. | Carrier, two-component developer containing carrier and toner, and image forming method |
US8263302B2 (en) | 2008-09-11 | 2012-09-11 | Ricoh Company, Ltd. | Carrier for electrophotography and two-component developer |
US8247150B2 (en) | 2008-09-17 | 2012-08-21 | Ricoh Company, Ltd. | Carrier for developing electrostatic latent image, two-component developer, supplemental developer, process cartridge, and image forming method |
US8512929B2 (en) | 2009-09-14 | 2013-08-20 | Ricoh Company, Ltd. | Latent electrostatic image developing carrier, two-component developer and image forming method |
US10025214B2 (en) | 2015-12-28 | 2018-07-17 | Ricoh Company, Ltd. | Carrier, developing agent, image forming apparatus, image forming method, replenishment toner, and process cartridge |
US10444651B2 (en) | 2017-03-17 | 2019-10-15 | Ricoh Company, Ltd. | Carrier, developer, supplemental developer, image forming apparatus, image forming method, and process cartridge |
US11106150B2 (en) | 2018-11-22 | 2021-08-31 | Ricoh Company, Ltd. | Carrier, developer, method, and apparatus for forming electrophotographic image, and process cartridge |
WO2021094957A1 (en) | 2019-11-15 | 2021-05-20 | Ricoh Company, Ltd. | Carrier for forming electrophotographic image, developer for forming electrophotographic image, electrophotographic image forming method, electrophotographic image forming apparatus, and process cartridge |
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