JPS60122958A - Electrostatic charge image developing toner - Google Patents

Electrostatic charge image developing toner

Info

Publication number
JPS60122958A
JPS60122958A JP58230554A JP23055483A JPS60122958A JP S60122958 A JPS60122958 A JP S60122958A JP 58230554 A JP58230554 A JP 58230554A JP 23055483 A JP23055483 A JP 23055483A JP S60122958 A JPS60122958 A JP S60122958A
Authority
JP
Japan
Prior art keywords
toner
image
sic
electrostatic charge
parts
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
Application number
JP58230554A
Other languages
Japanese (ja)
Other versions
JPH0623859B2 (en
Inventor
Hisao Murayama
久夫 村山
Toshiyasu Kawabata
川端　利保
Toshiki Minamitani
俊樹 南谷
Masami Tomita
正実 冨田
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP58230554A priority Critical patent/JPH0623859B2/en
Priority to GB08430534A priority patent/GB2151034B/en
Priority to DE19843444676 priority patent/DE3444676A1/en
Publication of JPS60122958A publication Critical patent/JPS60122958A/en
Publication of JPH0623859B2 publication Critical patent/JPH0623859B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • G03G9/09733—Organic compounds
    • G03G9/09741—Organic compounds cationic
    • 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
    • G03G9/0831—Chemical composition of the magnetic components
    • G03G9/0832—Metals
    • 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
    • G03G9/0831—Chemical composition of the magnetic components
    • G03G9/0833—Oxides
    • 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
    • G03G9/09—Colouring agents for toner particles
    • G03G9/0906—Organic dyes
    • 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

PURPOSE:To obtain a toner fixable with a heat roll superior in fixability, image quality, etc., by incorporating in the toner a specified amt. of >= one kind of particles selected from SiC, Si3N4, C3B4, ZrO2, and Cr2O3 in a specified particle diameter range. CONSTITUTION:The present toner is prepared by incorporating 0.1-20pts.wt. of >=one kind of particles selected from SiC, Si3N4, C3B4, ZrO2, and Cr2O3 in the particle diameter range of 0.1-20mum in 100pts.wt. of the toner contg. a binder resin, a colorant, such as carbon black or nigrosine dye, a electrostatic charge controller, etc., in a high-speed kneader, or the like. Since fine hard powder, such as SiC, having a Mohs' hardeness of >=8 is added, the toner is prevented from being pressed between a fixing roll and a toner support, crushed, smoothed, and made glossy, and a superior image is obtained without deteriorating fixability, and causing offset trouble.

Description

【発明の詳細な説明】 技術分野 この発明は、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を現像するためのトナーに関
する。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a toner for developing an electrostatic image formed in electrophotography, electrostatic printing, electrostatic recording, or the like.

従来技術 一般に静電荷像は、結着剤樹脂から成る微粒子体中に、
必要によって着色剤、極性−ＩＩ　Ｉｌｌ剤、磁性体な
どを含有し−Ｃいるトナーによって現像されるが、こう
してｍ−されたトナー像をその支持体に定着する必要が
ある。そして、この定着方法には種々の方法が知られて
いるが、特に加熱ロール定着装置等による接触加熱定着
法は、熱板定着装置等による無接触加熱法に比較して熱
効率が高い点で優れており、特に高速定着が可能になる
のが利点である。PRIOR ART In general, an electrostatic charge image is created by forming a fine particle body made of a binder resin.
If necessary, the toner image is developed with a toner containing a colorant, a polar II Ill agent, a magnetic material, etc., and it is necessary to fix the toner image thus obtained on its support. Various methods are known for this fixing method, but the contact heating fixing method using a heated roll fixing device is particularly superior in that it has higher thermal efficiency than the non-contact heating method using a hot plate fixing device. The advantage is that high-speed fixing is possible.

ところで、加熱ロール定着法によって定着するためには
、そのトナーの結着樹脂を加熱温度で確実に軟化させな
ければならない。また加熱ロールにトナーの一部が付着
しないように、１〜ナーとロールとの離型性を良好にし
なければならない。By the way, in order to fix the toner by the heating roll fixing method, the binder resin of the toner must be reliably softened at heating temperature. Furthermore, in order to prevent part of the toner from adhering to the heating roll, the releasability between the toner and the roll must be good.

しかし、従来、これらの条件を満足するトナーは、支持
体への定着性およびロールへの耐オフセット性は良好で
あるが、定着後の画像、特にベタ画像濃度が高くなり過
ぎ、光、沢のある画像となり、画像品質を損っていた。However, conventional toners that satisfy these conditions have good fixing properties to the support and good resistance to offset to the roll, but the image after fixing, especially the solid image density, is too high, and the toner has poor gloss and gloss. This resulted in a certain image, and the image quality was impaired.

この現象は定着ロールにフッ素樹脂を被覆した場合に顕
著であった。This phenomenon was remarkable when the fixing roll was coated with a fluororesin.

この原因は支持体に形成されたトナー像が定着のために
、加熱ロールを通過する時、加熱と同時にロール表面で
加圧され、トナー像表面がつぶれ、平滑になるために光
沢がでるからであった。The reason for this is that when the toner image formed on the support passes through a heating roll for fixing, it is heated and simultaneously pressurized by the roll surface, causing the toner image surface to collapse and become smooth, resulting in gloss. there were.

目　的 この発明は、トナーの定着性を低下さｌ！ないで、しか
も、定着後の画像濃度が必要以上に轟くならず、光沢の
少ない画像が得られる静電荷像現像用トナーを提供する
ことを目的とする。Purpose This invention reduces the fixing properties of toner! It is an object of the present invention to provide a toner for developing an electrostatic image, which does not cause the image density to increase more than necessary after fixing, and provides an image with less gloss.

構　成 上記目的を達成するために、この発明は、モース硬度が
８以上である硬い物質の微粉末をトナー中に配合してロ
ールによるトナー像の加圧作用を軽減しようとしたもの
であって、その禍成は、炭化珪素、窒化珪素、炭化硼素
、酸化ジルコニウムおにび酸化クロムのうち一種以上の
粒径０．１〜２０μｍの粒子を０．１〜２０重量部含有
する静電荷像現像用トナーである。Structure In order to achieve the above object, the present invention attempts to reduce the pressing effect of the toner image by the roll by incorporating fine powder of a hard substance having a Mohs hardness of 8 or more into the toner. , the problem is caused by electrostatic image development containing 0.1 to 20 parts by weight of particles of one or more of silicon carbide, silicon nitride, boron carbide, zirconium oxide, and chromium oxide with a particle size of 0.1 to 20 μm. It is a toner for use.

この発明のトナーは公知のトナーの製造法によって得る
ことができる。すなわち結着樹脂、荷電制御剤、必要に
よっては磁性体、着色剤等を溶融混練し、この混合物を
常温まで冷却後粉砕、分級し、公知のトナー粉体を得る
。このトナー粉体に、この発明の特徴である硬い微粉末
を混合分散することによって、この発明のトナーができ
る。The toner of this invention can be obtained by a known toner manufacturing method. That is, a binder resin, a charge control agent, and if necessary a magnetic material, a coloring agent, etc. are melt-kneaded, and this mixture is cooled to room temperature, then crushed and classified to obtain a known toner powder. The toner of the present invention is produced by mixing and dispersing hard fine powder, which is a feature of the present invention, into this toner powder.

この発明で用いる硬い物質の粒径は０．１〜２０μｍが
好適である。０．１μ鋼未満では、通常のトナーの粒径
より小さいから、ロールと支持体との間のスペーサーと
しての作用がなくなり、トナーがロールによって、平滑
にされ光沢をもってくる。上記粒径が２０μ−を越える
と、１−ナーの定着性が不十分になり、画像上に白抜け
が発生する原因になり適当でない。The particle size of the hard substance used in this invention is preferably 0.1 to 20 μm. If the particle size is less than 0.1μ, the grain size is smaller than the normal toner particle size, so it does not function as a spacer between the roll and the support, and the toner is smoothed by the roll and becomes glossy. If the particle size exceeds 20 .mu.--, the fixing properties of the 1-ner will be insufficient and white spots will appear on the image, which is not suitable.

また、上記硬い物質の含有量は０．１〜２０重量部が好
適である。ｏ、ｉｍｔｉ部未満では効果がなく、定着後
の画像に光沢が生じる。２０ｊ［ｌ山部を越えると、ト
ナーの定着性が不十分になる。Further, the content of the hard substance is preferably 0.1 to 20 parts by weight. There is no effect below the o and imti portions, and the image after fixing becomes glossy. If it exceeds the peak of 20j[l, the toner fixing performance will be insufficient.

この発明で使用する硬い物質は、上記粒径範囲および含
有量の範囲にあるモース硬度８以上の硬い物質であれば
使用可能であるが、すでにトナー用材料として公知の材
料である酸化珪素、酸化チタン、酸化アルミニウム等の
材料は下記のような欠点がある。The hard substance used in this invention can be any hard substance with a Mohs hardness of 8 or more within the above particle size range and content range, but silicon oxide, oxide Materials such as titanium and aluminum oxide have the following drawbacks.

例えば硬い物質として公知の酸化珪素、酸化チタンは帯
電極性が強いために、それをトナーの光沢防止に十分な
ｍを加えると、トナーの帯電量が低下し、時には極性が
反転してしまうこともある。この現象はトナーの帯電極
性がプラス極性であるときに顕著である。For example, silicon oxide and titanium oxide, which are known as hard substances, have strong charge polarity, so if enough m is added to prevent the gloss of the toner, the amount of charge on the toner will decrease, and sometimes the polarity will be reversed. be. This phenomenon is remarkable when the charging polarity of the toner is positive.

このために、得られた画像の光沢は防止できても、地肌
汚れが生じて実用に供し得ないｂのであった。For this reason, even if the gloss of the obtained image could be prevented, background staining occurred, making it impossible to put it to practical use.

また、酸化アルミニウムを用いた場合は、その電気抵抗
が小さいためにトナー全体の電気抵抗が極端に低下し、
帯電した電荷を保持できず、実質的には帯電量が低下し
、やはり地肌汚れが生じて実用的ではない。Additionally, when aluminum oxide is used, its low electrical resistance causes the electrical resistance of the entire toner to drop significantly.
It is not possible to retain the electric charge, and the amount of charge is substantially reduced, and the background stains occur, making it impractical.

結局、上記特許請求の範囲に記載したｖｌＪ買が実用に
耐える材料である。In the end, the vlJ material described in the claims above is a material that can withstand practical use.

以下、実施例によって、この発明を具体的に説明する。Hereinafter, the present invention will be specifically explained with reference to Examples.

実施例１ スチレン系樹脂　８０重Ｍ部 カーボンブラック　１５５重量 部ニグロシン系染料　５重量部 上記材料をヘンシエルミキザーで混合分散した後、熱ロ
ールにより混練し、冷却後、粉砕分級し、粒径５〜１５
μｌの粉体を得た。これに炭化珪素（不二具研磨工業製
、粒径２μｍモース硬度１３）３重社部をスピードニー
ダ−で混合分散し、この発明のトナーを製造した。この
トナーを下記の表の試料１とし、炭化珪素を混合しない
ものを比較試料１とする。Example 1 Styrenic resin 80 parts by weight Carbon black 155 parts by weight Nigrosine dye 5 parts by weight After mixing and dispersing the above materials in a Henschel mixer, kneading with hot rolls, cooling, pulverizing and classifying, particle size 5 ~15
μl of powder was obtained. A toner of the present invention was produced by mixing and dispersing silicon carbide (manufactured by Fujijuki Kogyo Co., Ltd., particle size 2 μm, Mohs hardness 13) with a speed kneader. This toner is designated as Sample 1 in the table below, and the toner not mixed with silicon carbide is designated as Comparative Sample 1.

実施例２ アクリル樹脂　９０重量部 カーボンブラック　８重量部 ニグロシン系染料　２重量部 上記材料を熱ロールにより混練し、冷却後、粉砕分級し
、粒径５〜１５μｍを得、これに酸化クロム（関東研磨
工業製、粒径３μｍ１モ一ス硬度９）、３重量部を加え
てスピードニーダ−で混合分散し、この発明のトナーを
製造した。このトナーを下記の表の試料２とし、酸化ク
ロムを混合しないしのを比較例２とする。Example 2 Acrylic resin 90 parts by weight Carbon black 8 parts by weight Nigrosine dye 2 parts by weight The above materials were kneaded with a hot roll, cooled, and then crushed and classified to obtain a particle size of 5 to 15 μm. A toner of the present invention was produced by adding 3 parts by weight of a commercially available product having a particle size of 3 μm and a moss hardness of 9) and mixing and dispersing it in a speed kneader. This toner is designated as Sample 2 in the table below, and the toner without chromium oxide is designated as Comparative Example 2.

実施例３ スチレン系樹１１８５重量部 カーボンブラック　１０重量部 四級アンモニウム塩　５重置部 以上の材料を熱ロールで混練し、冷却後、粉砕分級し、
５〜１２μ請にし、これに酸化ジルコニウム（関東研磨
１１Ｐ、！Ｉ！ｊ粒径０粒径０顔５混合分散し、この発
明のトナーを製造した。Example 3 Styrenic tree 1185 parts by weight Carbon black 10 parts by weight Quaternary ammonium salt 5 or more parts of the materials were kneaded with hot rolls, cooled, crushed and classified,
The toner of the present invention was produced by mixing and dispersing zirconium oxide (Kanto Polish 11P, !I!j particle size 0 particle size 0 face 5) into the powder.

これを下記の表の試料３とする。酸化ジル−１ニウムを
含有しないトナーを比較例３とする。This is designated as sample 3 in the table below. Comparative Example 3 is a toner that does not contain di-1 nium oxide.

実施例４ スチレン系樹脂　４５重量部 四三酸化鉄　５０重量部 ニグロシン系染料　５重量部 をヘンシェルミキサーで混合分散した後、連続混線機で
混練し、冷却後、粉砕分級し、５〜１２μｍにし、これ
に炭化珪素（不二具研磨工業製粒径５μｍモース硬度１
３）５重量部をスピードニーダ−で混合分散し、この発
明の１〜ナーを製造した。これを下記の表の試料４とす
る。炭化珪素を含有しないものを比較試料４とする。Example 4 Styrenic resin 45 parts by weight Triiron tetroxide 50 parts by weight Nigrosine dye 5 parts by weight were mixed and dispersed in a Henschel mixer, kneaded in a continuous mixer, cooled, pulverized and classified to 5 to 12 μm, Silicon carbide (manufactured by Fujigu Polishing Industry Co., Ltd., particle size: 5 μm, Mohs hardness: 1
3) 5 parts by weight were mixed and dispersed in a speed kneader to produce 1 to 3 of this invention. This is designated as sample 4 in the table below. Comparative sample 4 does not contain silicon carbide.

以上の実施例に記載の方法で製造した試料１乃ｆｉ４お
よび硬い物質の微粉末を含有しないトナーを比較試料１
乃至４としてその定着試験をした。定着試験は通常の電
子写真法により形成した静電荷像を現像し、得られたト
ナー像を転写紙上に転写し、転写紙上のトナー付着ｍが
１．０＋　０．２Ｉｌｌ（１／　０１に：　／ａ　’ｂ
　に　’５　’Ｘベタｍ像（３０膳−Φ）の未定着画像
をつくり、この未定着画像をリコー製複写ｍＦＴ４ｔａ
ｏ用熱ロール定着機（表向フッ素樹脂被覆ロール）で定
着し、マクベス！１度計で画像１ｒｊＬを測定した。そ
の結果は下記の表に示すとおりである。Samples 1 to fi4 manufactured by the method described in the above Examples and Comparative Sample 1 were toners containing no fine powder of hard substances.
The fixation test was conducted as 4 to 4. In the fixation test, an electrostatic image formed by a normal electrophotographic method is developed, the obtained toner image is transferred onto a transfer paper, and the toner adhesion m on the transfer paper is 1.0 + 0.2 Ill (on 1/01: / a'b
Create an unfixed image of '5' x solid m image (30mm-Φ), and copy this unfixed image with Ricoh Copy mFT4ta.
Macbeth! Image 1rjL was measured with a 1-degree meter. The results are shown in the table below.

この表から明らかなように、この発明の１〜ナーは適疫
な画像１１度であり、フッ素樹脂を被覆した加熱ロール
にありがちな光沢ができなかった。これに対して、比較
試料トナーは光沢があり、画像品質も劣っており、実用
に供し得ないものであった。As is clear from this table, the images of 1 to 2 of the present invention had an appropriate image of 11 degrees, and did not produce the gloss that is common with heating rolls coated with fluororesin. On the other hand, the comparative sample toner was glossy and had poor image quality, and could not be put to practical use.

転写紙への定着性は、この発明のトナーも比較試料のト
ナーも良好であった。Both the toner of the present invention and the comparative sample toner had good fixability to transfer paper.

旌−１ この発明のトナーを用いると、地肌汚れのない鮮明な画
像が得られ、現像、定着後の画一が適度な濃度を有し、
かつ、光沢のないものが得られる。楌-1 When using the toner of the present invention, a clear image without background stains can be obtained, and the image after development and fixing has an appropriate density;
Moreover, a product without gloss can be obtained.

特許出願人　株式会社リ　コ　ー 代理人　弁理士　小　松　秀　岳 代理人　弁理士　旭　宏Patent applicant Rico Co., Ltd. Agent Patent Attorney Hidetake Komatsu Agent Patent Attorney Hiroshi Asahi

Claims (1)

【特許請求の範囲】[Claims] 炭化珪素、窒化珪素、炭化硼素、酸化ジルコニウムおよ
び酸化クロムのうち一種以上の粒径０．１〜２０μ−の
粒子を０．１〜２０重量部含有する静電荷像現像用トナ
ー。A toner for developing electrostatic images containing 0.1 to 20 parts by weight of particles of one or more of silicon carbide, silicon nitride, boron carbide, zirconium oxide, and chromium oxide and having a particle size of 0.1 to 20 μ-.
JP58230554A 1983-12-08 1983-12-08 Toner for electrostatic image development Expired - Lifetime JPH0623859B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP58230554A JPH0623859B2 (en) 1983-12-08 1983-12-08 Toner for electrostatic image development
GB08430534A GB2151034B (en) 1983-12-08 1984-12-04 Toner for development latent electrostatic images
DE19843444676 DE3444676A1 (en) 1983-12-08 1984-12-07 TONER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58230554A JPH0623859B2 (en) 1983-12-08 1983-12-08 Toner for electrostatic image development

Publications (2)

Publication Number Publication Date
JPS60122958A true JPS60122958A (en) 1985-07-01
JPH0623859B2 JPH0623859B2 (en) 1994-03-30

Family

ID=16909572

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58230554A Expired - Lifetime JPH0623859B2 (en) 1983-12-08 1983-12-08 Toner for electrostatic image development

Country Status (3)

Country Link
JP (1) JPH0623859B2 (en)
DE (1) DE3444676A1 (en)
GB (1) GB2151034B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62164051A (en) * 1986-01-16 1987-07-20 Fujitsu Ltd Electrophotographic developer
JPH0192662U (en) * 1987-12-14 1989-06-16

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61183664A (en) * 1985-02-08 1986-08-16 Ricoh Co Ltd Electrostatic charge image developing toner
DE602004010483T2 (en) * 2004-03-05 2008-12-18 Eco-Cosmo Co., Ltd. Long-acting, general-purpose water-repellent

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3632337A (en) * 1970-02-02 1972-01-04 Ibm An electrostatic imaging process wherein the developer includes boron nitride
US3983045A (en) * 1971-10-12 1976-09-28 Xerox Corporation Three component developer composition
BE789987A (en) * 1971-10-12 1973-04-12 Xerox Corp COMPOSITION OF DEVELOPER AND METHOD FOR ITS USE
US4051077A (en) * 1974-02-25 1977-09-27 Xerox Corporation Non-filming dual additive developer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62164051A (en) * 1986-01-16 1987-07-20 Fujitsu Ltd Electrophotographic developer
JPH0192662U (en) * 1987-12-14 1989-06-16

Also Published As

Publication number Publication date
DE3444676A1 (en) 1985-06-20
GB8430534D0 (en) 1985-01-09
JPH0623859B2 (en) 1994-03-30
DE3444676C2 (en) 1987-07-30
GB2151034B (en) 1987-01-14
GB2151034A (en) 1985-07-10

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