JPS63106665A - Toner for magnetic image printing - Google Patents
Toner for magnetic image printingInfo
- Publication number
- JPS63106665A JPS63106665A JP61252423A JP25242386A JPS63106665A JP S63106665 A JPS63106665 A JP S63106665A JP 61252423 A JP61252423 A JP 61252423A JP 25242386 A JP25242386 A JP 25242386A JP S63106665 A JPS63106665 A JP S63106665A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- toner
- polyethylene wax
- weight
- magnetic head
- 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
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 90
- 238000007639 printing Methods 0.000 title claims abstract description 15
- 239000004698 Polyethylene Substances 0.000 claims abstract description 19
- -1 polyethylene Polymers 0.000 claims abstract description 19
- 229920000573 polyethylene Polymers 0.000 claims abstract description 19
- 239000003822 epoxy resin Substances 0.000 claims abstract description 10
- 239000006247 magnetic powder Substances 0.000 claims abstract description 10
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 10
- 239000004593 Epoxy Substances 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 15
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229930185605 Bisphenol Natural products 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- 241000257465 Echinoidea Species 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- CJPQIRJHIZUAQP-MRXNPFEDSA-N benalaxyl-M Chemical compound CC=1C=CC=C(C)C=1N([C@H](C)C(=O)OC)C(=O)CC1=CC=CC=C1 CJPQIRJHIZUAQP-MRXNPFEDSA-N 0.000 description 1
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007580 dry-mixing Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- UCNNJGDEJXIUCC-UHFFFAOYSA-L hydroxy(oxo)iron;iron Chemical compound [Fe].O[Fe]=O.O[Fe]=O UCNNJGDEJXIUCC-UHFFFAOYSA-L 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- G03G9/087—Binders for toner particles
- G03G9/08742—Binders for toner particles comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- G03G9/08753—Epoxyresins
-
- 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
- G03G9/087—Binders for toner particles
- G03G9/08775—Natural macromolecular compounds or derivatives thereof
- G03G9/08782—Waxes
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は磁気潜像を現像し、転写後間光定着を行う磁気
印写方法に使用するトナーに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a toner used in a magnetic printing method in which a magnetic latent image is developed and optically fixed after transfer.
［従来の技術］
画像再生方式の一つとして、磁気記録技術を応用した磁
気印写方式が開発され、実用化されている。磁気印写方
式は、記録媒体である磁気ドラム上に、情報信号を磁気
ヘッドにより占き込んで □磁気潜像を形成する工程と
、磁気潜像を一成分系の磁性トナーにより現象する工程
と、トナー像を転写シート上に転写する工程と、転写さ
れたトナー像を定着する工程と、転写後磁気ドラム上に
残留する磁性トナーをブレードなどによりクリーニング
する工程を含んでいる（特開昭５４−３２３２８号参照
）。この磁気印写方式は、電子写真方式におけるように
数万枚のコピー毎に感光体を交換する必要がなく、メイ
ンテナンスが容易であるという利点を有する。[Prior Art] As one of the image reproduction methods, a magnetic printing method that applies magnetic recording technology has been developed and put into practical use. The magnetic printing method involves two steps: □ a step in which information signals are captured by a magnetic head on a magnetic drum, which is a recording medium, to form a magnetic latent image; and a step in which the magnetic latent image is developed using a single-component magnetic toner. , a step of transferring the toner image onto a transfer sheet, a step of fixing the transferred toner image, and a step of cleaning the magnetic toner remaining on the magnetic drum after the transfer using a blade or the like (Japanese Patent Laid-Open No. 54 -32328). This magnetic printing method has the advantage that there is no need to replace the photoreceptor every time tens of thousands of copies are made, unlike in the electrophotographic method, and maintenance is easy.
磁気印写方式における定着は、電子写真方式におけると
同球に熱Ｏ−ル定着方式、オーブン定着方式、閃光定着
方式あるいは圧力定着方式によりて行われる。これらの
うちｘｅもしくはハロゲンガスの光光スペクトルを利用
した閃光定着方式は、２００〜３００Ｊ程度の熱Φを１
００μｓｅｃ程度の短時間に照射するため、被照射物か
らの熱の損失が少なく効率よく加熱でき、火災の恐れが
ないことやクイックスタートが可能であることなどの利
点を有する。Fixing in the magnetic printing method is carried out in the same sphere as in the electrophotographic method by a hot oil fixing method, an oven fixing method, a flash fixing method, or a pressure fixing method. Among these, the flash fixing method that utilizes the light spectrum of xe or halogen gas uses a heat
Since the irradiation is performed in a short time of about 0.000 μsec, there is less heat loss from the irradiated object and it can be heated efficiently, and has advantages such as there is no risk of fire and quick start is possible.
［発明が解決しようとする問題点］
上記の磁気印写方式においては、磁気ヘッドに通電する
ことにより生じた磁力線の一部が、磁気ヘッドのギャッ
プ部から記録媒体に漏洩して、磁化パターン（潜像）が
形成される。そのため磁気ヘッドと磁気ドラムとの間の
スペースはできるだけ狭いほうがよく、一般に５μｍ以
下（実用上は１μｍ位）と極めて狭くされている。[Problems to be Solved by the Invention] In the above-mentioned magnetic printing method, some of the magnetic lines of force generated by energizing the magnetic head leak into the recording medium through the gap of the magnetic head, resulting in a magnetized pattern ( latent image) is formed. Therefore, the space between the magnetic head and the magnetic drum should be as narrow as possible, and is generally very narrow, less than 5 μm (in practice, about 1 μm).
ところが磁性トナーとして閃光定着可能な磁性トナーを
用いて磁気印写を行なう場合、磁気ヘッドにトナー等が
付着するという現象が生ずる。詳述すると、磁気ヘッド
により磁気ドラムに情報を古き込むときには、クリーニ
ングブレードが磁気ドラムから離間されるので、ブレー
ドの先端にたまっていたトナーや磁気ドラム表面被覆材
の微粉及び紙粉等が飛散し、磁気ヘッドに付着する。こ
のうち閃光定着用のトナーは熱により容易に溶融する性
質を持っているので、磁気ヘッドに融着した状態となり
容易に離れない。またブレードでクリーニングを行なっ
ても多少のトナー等は磁気ドラム上に残留するので、情
報信号の出き込み時に磁気ヘッドが磁気ドラム上を走査
することによっても、磁気ヘッドにトナー等が付着づる
。このＪ：うに磁気ヘッドによる情報信号の出き込み回
数の増加に伴なって磁気ヘッドへのトナー等の付着量が
増加する。However, when performing magnetic printing using a flash-fixable magnetic toner, a phenomenon occurs in which toner and the like adhere to the magnetic head. To be more specific, when the magnetic head writes information to the magnetic drum, the cleaning blade is separated from the magnetic drum, so that the toner, fine particles of the magnetic drum surface coating material, paper dust, etc. that have accumulated on the tip of the blade are scattered. , adheres to the magnetic head. Among these toners, the toner for flash fixing has a property of being easily melted by heat, so that it is fused to the magnetic head and cannot be easily separated. Further, even if cleaning is performed with a blade, some toner remains on the magnetic drum, so toner and the like adhere to the magnetic head when the magnetic head scans the magnetic drum during input and output of information signals. As the number of inputs and outputs of information signals by the J: sea urchin magnetic head increases, the amount of toner etc. adhering to the magnetic head increases.
そして磁気ヘッドにトナー等が付着でると、見かけ上磁
気ドラムと磁気ヘッドとの間のスペースが拡がることに
なるので、磁気潜像が磁性トナーを吸引する力が弱まり
、画像濃度が低下してしまう。When toner etc. adheres to the magnetic head, the space between the magnetic drum and the magnetic head appears to expand, which weakens the ability of the magnetic latent image to attract the magnetic toner and reduces image density. .
したがって本発明の目的は、磁気ヘッドへの付着が少な
く、もって高濃度の画椴が得られる磁気印写用トナーを
提供することである。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a toner for magnetic printing that has less adhesion to a magnetic head and can thereby provide a high-density image.
［問題点を解決するための手段１
本発明者等は、磁気ヘッドへのトナー等の付着を防止ず
べく種々検討した結渠、定着用樹脂と磁性粉を主体とす
るトナー粒子にポリエチレンワックスを添加することに
より上記目的が達成されることを発見し、本発明に到達
した。[Means for Solving the Problems 1] The present inventors have conducted various studies to prevent toner from adhering to the magnetic head, and have applied polyethylene wax to toner particles mainly composed of fixing resin and magnetic powder. The inventors have discovered that the above object can be achieved by adding the above-mentioned substances, and have arrived at the present invention.
木光明の磁気印写用トナーは、７００〜１０００のエポ
キシ当量を有するエポキシ樹脂と、磁性粉５０〜７０重
量％と、分子量が７０００〜１２０００の範囲にあるポ
リエチレンワックス１〜５重量％とを含み、閃光定着方
式に適する磁性トナーであることを特徴とする。Kikomei's magnetic printing toner contains an epoxy resin having an epoxy equivalent of 700 to 1000, 50 to 70% by weight of magnetic powder, and 1 to 5% by weight of polyethylene wax having a molecular weight in the range of 7000 to 12,000. , a magnetic toner suitable for a flash fixing method.
ポリエチレンワックスを添加した磁性トナーを用いて磁
気印写を行なうと、前述した通り磁気ヘッドによる情報
信号の震き込み時にトナーが一時的に磁気ヘッドに付着
するが、ポリエチレンワックスは加熱後冷却すると収縮
する性質をもっているので、トナーは容易に磁気ヘッド
から離脱し、融着することはほとんどない。When performing magnetic printing using magnetic toner containing polyethylene wax, the toner temporarily adheres to the magnetic head when the information signal is transmitted by the magnetic head, as described above, but polyethylene wax shrinks when cooled after heating. Therefore, the toner easily separates from the magnetic head and is hardly fused.
トナー粒子に添加づるポリエチレンワックスは、７００
０〜１２０００の範囲の分子量を有する。分子量が７０
００未満であると、ポリエチレンワックスが軟らかいの
で磁気ヘッドの汚れが発生しやすい。また分子量が１２
０００を越えると、ポリエチレンワックスが固くなって
定着性が低下する。The polyethylene wax added to the toner particles is 700
It has a molecular weight ranging from 0 to 12,000. Molecular weight is 70
If it is less than 00, the polyethylene wax is soft and the magnetic head is likely to become dirty. Also, the molecular weight is 12
If it exceeds 000, the polyethylene wax becomes hard and the fixing properties deteriorate.
このようなポリエチレンワックスはトナー粒子中に１〜
５重量％添加する。添加量が１重量％未満ではその効果
が不十分であり、添加量が５車量％を越えると定着性が
低下する。Such polyethylene wax is contained in toner particles from 1 to
Add 5% by weight. If the amount added is less than 1% by weight, the effect will be insufficient, and if the amount added exceeds 5% by weight, the fixing properties will be reduced.
本発明のトナー粒子は必須成分として次のような定着用
樹脂と磁性粉を含有する。The toner particles of the present invention contain the following fixing resin and magnetic powder as essential components.
閃光定着型トナーにあっては、定着用樹脂として、保存
性及び定着性の点から比較的軟化点の低いエポキシ樹脂
を使用するが、特にビスフェノールをエポキシ樹脂が有
効である。このようなエポキシ樹脂のうちでもエポキシ
当市が７００未満では、樹脂が軟らかくなりすぎて保存
安定性が低く、またエポキシ当量が１０００を越えると
定着性が低下する。従って、エポキシ樹脂のエポキシ当
市は７００〜１０００の範囲である。For flash fixing type toners, an epoxy resin having a relatively low softening point is used as the fixing resin from the viewpoint of storage stability and fixing properties, and epoxy resins are particularly effective for bisphenol. Among such epoxy resins, if the epoxy equivalent weight is less than 700, the resin becomes too soft and the storage stability is low, and if the epoxy equivalent weight exceeds 1000, the fixing properties are decreased. Therefore, the epoxy value of the epoxy resin ranges from 700 to 1000.
磁性粉としては、フェライト、マグネタイトをはじめと
する鉄、コバルト、ニッケルなどの強磁性を示す元素を
含む合金あるいは化合物からなる粒径０．１〜３μｍ程
度の粒子を用いることができる。磁性粉の含有量は５０
〜７０Φ量％の範囲がよい。As the magnetic powder, particles having a particle size of about 0.1 to 3 μm made of an alloy or compound containing ferromagnetic elements such as ferrite, magnetite, iron, cobalt, and nickel can be used. The content of magnetic powder is 50
The range of 70 Φ amount % is preferable.
５０重量％未満であると、トナーの磁力が低く、カプリ
が生じやづい上、搬送性も低い。また７０重量％を越え
ると定着性が低下する。If it is less than 50% by weight, the toner has low magnetic force, tends to cause capri, and has poor conveyance. Moreover, if it exceeds 70% by weight, fixing properties will deteriorate.
本発明のトナー粒子は上記成分のほかに、流動性改質剤
（例えば疎水性シリカ）・、抵抗調節剤（例えばカーボ
ンブラック）、荷電制御剤（例えばニグロシン染料）等
の公知の添加物を１種又は２種以上含んでもよい。これ
らの添加剤の含有量は、定着性を阻害しないために１０
重量％以下がよい。In addition to the above components, the toner particles of the present invention contain known additives such as a fluidity modifier (for example, hydrophobic silica), a resistance modifier (for example, carbon black), a charge control agent (for example, nigrosine dye), etc. It may contain one species or two or more species. The content of these additives is 10
It is preferable that the amount is less than % by weight.
本発明の磁性トナーは、例えば上記各原料を乾式混合し
、加熱温練後冷却固化してから粉砕し、熱５１！Ｌ理を
施し、そして分級することにより製造することができる
。The magnetic toner of the present invention can be prepared, for example, by dry mixing the above-mentioned raw materials, heating and kneading, cooling and solidifying, and then pulverizing. It can be produced by subjecting it to L treatment and then classifying it.
本発明の磁性トナーは、普通紙への転写を容易にするた
めに１０ Ω・α以上の体積抵抗を有することが望まし
い。この体積抵抗は試料を数１０ｒＲｇ計り取り、ダイ
アルゲージを改良した内Ｎ３．０５ｉｍ（断面積＝０．
０７３ｍ）のテフロン（商品名）製絶縁シリンダー中に
充填し、ｏ、ｉｘｙの荷重を印加し、ＤＣ４にＶ／ｃｍ
の電場で抵抗を測定することにより篩用される。測定に
は横河ヒューレットパツカード製絶縁抵抗計（４３２９
Ａ型）を用いる。The magnetic toner of the present invention desirably has a volume resistivity of 10 Ω·α or more in order to facilitate transfer to plain paper. This volume resistance was determined by measuring several tens of rRg of the sample and improving the dial gauge to N3.05im (cross-sectional area = 0.
073m) was filled in a Teflon (trade name) insulating cylinder, and a load of o, ixy was applied to DC4 at V/cm.
Sieving is performed by measuring the resistance in an electric field. For measurement, Yokogawa Hewlett Packard Card insulation resistance meter (4329) was used.
Type A) is used.
また本発明の磁性トナーは、カブリを少なくするために
±２５Ｖ以内の帯電電圧を有することが望ましい。この
帯電電圧は第１図に示す装置によって測定する。同図に
おいて、１は非磁比スリーブ、２は永久磁石部材、３は
表面電位計、４は測定子である。具体的には、非磁性ス
リーブ１は外径５０順であり、永久磁石部材２は外径４
６順および長さ１５０Ｍで１２極対称１ｍされており、
スリーブ上の磁束密度は１０００Ｇである。また表面電
位計３としてトレツク３４４を使用する。スリーブ１と
測定子４との間隙９を５鰭に調整した後、スリーブ１上
にトナーを３ｇ供給し、永久磁石部材２を７００Ｏｒ＋
１１で１分間回転させることにより、トナーの表面電位
を測定する。Further, the magnetic toner of the present invention desirably has a charging voltage within ±25 V in order to reduce fog. This charging voltage is measured by the apparatus shown in FIG. In the figure, 1 is a non-magnetic sleeve, 2 is a permanent magnet member, 3 is a surface electrometer, and 4 is a probe. Specifically, the non-magnetic sleeve 1 has an outer diameter of 50, and the permanent magnet member 2 has an outer diameter of 4.
It is 1m in 12 pole symmetry with 6 order and length 150M,
The magnetic flux density on the sleeve is 1000G. In addition, a Trec 344 is used as the surface electrometer 3. After adjusting the gap 9 between the sleeve 1 and the probe 4 to 5 fins, 3g of toner is supplied onto the sleeve 1, and the permanent magnet member 2 is heated to 700Or+.
The surface potential of the toner is measured by spinning at 11 for 1 minute.
［実施例］
以下本発明を実施例によってさらに詳細に説明するが、
本発明はこれらの例に限定されるものではない。[Examples] The present invention will be explained in more detail by Examples below.
The present invention is not limited to these examples.
実施例１
ビスフェノール型エポキシ樹ｒＦＪ（シェル化学製エピ
コート１００４Ｋ、エポキシ樹脂＝ ８８０）３２重量
％、カーボンブラック２重量％、マグネタイト（戸田工
業製Ｅ Ｐ Ｔ ５００）６５重量％、高密度ポリエチ
レンワックス（分子ｆｆ１８０００） １重量％を乾式
混合し、バンバリーにて１００℃の温度で混練した。混
練物を冷却固化後ジェットミルにて粉砕し、分級して平
均粒径１５μｍの磁性トナー（ｔ４ｏ、１）を得た。こ
のトナーの体積抵抗は１×１００・α、帯電電圧は一１
０Ｖであった。Example 1 32% by weight of bisphenol-type epoxy tree rFJ (Epicoat 1004K manufactured by Shell Chemical Co., Ltd., epoxy resin = 880), 2% by weight of carbon black, 65% by weight of magnetite (EPT 500 manufactured by Toda Kogyo Co., Ltd.), high-density polyethylene wax (Molecular ff18000) were dry mixed and kneaded at a temperature of 100°C in a Banbury. The kneaded material was cooled and solidified, then pulverized with a jet mill and classified to obtain a magnetic toner (t4o, 1) with an average particle size of 15 μm. The volume resistivity of this toner is 1×100・α, and the charging voltage is -1
It was 0V.
実施例２
ポリエチレンワックスの添加量を変えた以外は実施例１
と同様の条件（但し、磁性粉の含有量はそのままで、エ
ポキシ樹脂の含有量を変えて全体を１００重量％とした
）で、３種類の磁性トナー（Ｎｏ、２〜４）をｇ Ｂし
た。ポリエチレンワックスの添加量は、ＮＯ１２のトナ
ーが２！Ｔ！吊％、ＮＯ６３のトナーが３重量％、Ｎ０
０４のトナーが５重量％とした。Example 2 Example 1 except that the amount of polyethylene wax added was changed
Under the same conditions as (however, the content of magnetic powder remained the same and the content of epoxy resin was changed to make the total 100% by weight), three types of magnetic toners (No. 2 to 4) were prepared in g B. . The amount of polyethylene wax added is 2 for NO12 toner! T! Hanging%, NO63 toner is 3% by weight, N0
The amount of toner No. 04 was 5% by weight.
実施例３
分子間が１ｉｏｏｏの高密度ポリエチレンワックスを用
いた以外は実施例１と同様の条件で磁性トナー（Ｎｏ、
５）を製造した。Example 3 Magnetic toners (No.
5) was manufactured.
比較例１
ポリエチレンワックスの添加量を０．５重量％および６
重量％に変えた以外は実施例１と同様の条件で（但し、
磁性粉の含有量はそのままで、エポキシ１ｆｆｉの含有
量を変えて全体を１００ｆｆｉ％とした）、２種類の磁
性トナー（Ｎｏ、６．７）を製造した。Comparative Example 1 The amount of polyethylene wax added was 0.5% by weight and 6% by weight.
The conditions were the same as in Example 1 except that the weight percentage was changed (however,
Two types of magnetic toners (No. 6.7) were produced (the content of magnetic powder remained the same, but the content of epoxy 1ffi was changed to make the total 100ffi%).
比較例２
分子間が４０００の中密度ポリエチレンワックスを用い
た以外は実施例１と同様の条件で磁性トナー（Ｎｏ。８
）を製造した。Comparative Example 2 Magnetic toner (No. 8
) was manufactured.
上記の各磁性トナーを用いて、次の条件で画像を作成し
た。Images were created using each of the above magnetic toners under the following conditions.
アルミニウム合金製ドラム上にＣｏ−Ｎ１−ＰのＮ１性
層を形成し、さらにその上に旧−Ｐの非磁性層をメッキ
により形成した磁気ドラム（外径８６關）を、周速ｉｓ
ｍ／ｓｅｃの条件で回転させ、磁気ヘッドにより画像の
田き込みを行なって、磁気潜像を形成した。磁気ヘッド
はＨｎ−２ｎフエライトにより形成されており、突き合
わせギャップは４μｍで、磁気ドラムとのスペースは記
録時に約２μｍであった。アルミニウム製スリーブの内
部に４＃Ａ！磁ゴムフ工ライト磁石（スリーブ上の磁束
密度は現像磁極が５０Ｇ１他は４００Ｇ）を有するマグ
ネットロールを備えた現像装置により、磁気潜像の現像
を行なった。現像トナー像は誘電体転写ローラを用いて
１．５ＫＶの転写電圧で普通紙上に転写した。定着は、
Ｘｅランプ定着（コンデンサー容量２５０μＦ、２００
０Ｖ）により約６００Ｊのエネルギーを照射して行なっ
た。磁気ドラムのクリーニングは厚さ５０μｍの黄銅ブ
レードと空気吸引により行った。A magnetic drum (outer diameter 86 mm), in which an N1 layer of Co-N1-P is formed on an aluminum alloy drum, and a non-magnetic layer of old-P is further formed on it by plating, is heated at a circumferential speed of
It was rotated under conditions of m/sec, and an image was imprinted with a magnetic head to form a magnetic latent image. The magnetic head was made of Hn-2n ferrite, the butt gap was 4 μm, and the space with the magnetic drum was about 2 μm during recording. 4#A inside the aluminum sleeve! The magnetic latent image was developed using a developing device equipped with a magnet roll having a magnetic rubber foil magnet (the magnetic flux density on the sleeve was 50 G for the developing magnetic pole and 400 G for the other). The developed toner image was transferred onto plain paper using a dielectric transfer roller at a transfer voltage of 1.5 KV. The establishment is
Xe lamp fixation (capacitor capacity 250 μF, 200
This was carried out by irradiating energy of about 600 J with 0 V). The magnetic drum was cleaned using a 50 μm thick brass blade and air suction.
画像は、初期および出き込みを１万回繰返した後に評価
した。その結果を表１に示す。Images were evaluated initially and after 10,000 repetitions. The results are shown in Table 1.
表１から、分子量が７０００〜１２０００の範囲にある
ポリエチレンワックスを１〜５重量％含む磁性トナー（
Ｎｏ、１〜５）を用いた場合は、出き込みを［！！に行
っても磁気ヘッドの汚れはなく、高い画＠濃度が得られ
るとともにその低下もほと／νどないことがわかる。From Table 1, it can be seen that magnetic toner (
No. 1 to 5), enter and exit [! ! It can be seen that the magnetic head is not contaminated even when the magnetic head is used, high image density is obtained, and there is almost no deterioration in image density.
これに対してポリエチレンワックスの少ない磁性トナー
（Ｎｏ、６）では、画像濃度が著しく低下し、またポリ
エチレンワックスの多い磁性トナー（Ｎ。On the other hand, with the magnetic toner (No. 6) containing less polyethylene wax, the image density decreased significantly, and with the magnetic toner (No. 6) containing more polyethylene wax.
、７〕では定着性が小さいことがわかる。ぞしてポリエ
チレンワックスの分子量が小さいと（Ｎｏ、８）、磁気
ヘッドの汚れが発生することが確認された。, 7], it can be seen that the fixability is low. On the other hand, it was confirmed that when the molecular weight of the polyethylene wax was small (No. 8), staining of the magnetic head occurred.
「発明の効果」
本発明の磁性トナーは、ポリエチレンワックスを含むの
で、磁気ヘッドへの付着を防止できるとともに良好な両
件を得ることができる。"Effects of the Invention" Since the magnetic toner of the present invention contains polyethylene wax, it is possible to prevent adhesion to the magnetic head and to obtain both favorable conditions.
第１図はトナーの表面電位の測定装置を示す図である。 FIG. 1 is a diagram showing an apparatus for measuring the surface potential of toner.
Claims (3)
７００〜１０００のエポキシ当量を有するエポキシ樹脂
と、磁性粉５０〜７０重量％と、分子量が７０００〜１
２０００の範囲にあるポリエチレンワックス１〜５重量
％とを含む粒子からなることを特徴とする磁気印写用ト
ナー。(1) In toner for magnetic printing using flash fixing,
An epoxy resin having an epoxy equivalent of 700 to 1000, 50 to 70% by weight of magnetic powder, and a molecular weight of 7000 to 1
1 to 5% by weight of polyethylene wax in the range of 2,000% by weight.
において、１０＾１＾４Ω・ｃｍ以上の体積抵抗を有す
ることを特徴とする磁気印写用トナー。(2) The toner for magnetic printing according to claim 1, which has a volume resistivity of 10^1^4 Ω·cm or more.
写用トナーにおいて、±２５Ｖ以内の帯電電圧を有する
ことを特徴とする磁気印写用トナー。(3) The toner for magnetic printing according to claim 1 or 2, characterized in that it has a charging voltage within ±25V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61252423A JPH0719077B2 (en) | 1986-10-23 | 1986-10-23 | Toner for magnetic printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61252423A JPH0719077B2 (en) | 1986-10-23 | 1986-10-23 | Toner for magnetic printing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63106665A true JPS63106665A (en) | 1988-05-11 |
| JPH0719077B2 JPH0719077B2 (en) | 1995-03-06 |
Family
ID=17237152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61252423A Expired - Lifetime JPH0719077B2 (en) | 1986-10-23 | 1986-10-23 | Toner for magnetic printing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0719077B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5238789A (en) * | 1988-10-03 | 1993-08-24 | Fuji Photo Film Co., Ltd. | Color photographic image formation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55129358A (en) * | 1979-03-28 | 1980-10-07 | Hitachi Metals Ltd | Magnetic toner for electrophotography |
| JPS565560A (en) * | 1979-06-27 | 1981-01-21 | Hitachi Metals Ltd | Magnetic toner |
| JPS58203456A (en) * | 1982-05-24 | 1983-11-26 | Fujitsu Ltd | Electrophotographic flash fixing toner |
-
1986
- 1986-10-23 JP JP61252423A patent/JPH0719077B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55129358A (en) * | 1979-03-28 | 1980-10-07 | Hitachi Metals Ltd | Magnetic toner for electrophotography |
| JPS565560A (en) * | 1979-06-27 | 1981-01-21 | Hitachi Metals Ltd | Magnetic toner |
| JPS58203456A (en) * | 1982-05-24 | 1983-11-26 | Fujitsu Ltd | Electrophotographic flash fixing toner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5238789A (en) * | 1988-10-03 | 1993-08-24 | Fuji Photo Film Co., Ltd. | Color photographic image formation method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0719077B2 (en) | 1995-03-06 |
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