JPS6361266A - Flash fixing type magnetic toner for developing magnetic latent image - Google Patents
Flash fixing type magnetic toner for developing magnetic latent imageInfo
- Publication number
- JPS6361266A JPS6361266A JP61205642A JP20564286A JPS6361266A JP S6361266 A JPS6361266 A JP S6361266A JP 61205642 A JP61205642 A JP 61205642A JP 20564286 A JP20564286 A JP 20564286A JP S6361266 A JPS6361266 A JP S6361266A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- toner
- resin
- image
- latent image
- 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 85
- 239000002245 particle Substances 0.000 claims abstract description 35
- 239000006247 magnetic powder Substances 0.000 claims abstract description 9
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 6
- 229920013716 polyethylene resin Polymers 0.000 claims description 8
- 230000005389 magnetism Effects 0.000 claims 1
- 229920005989 resin Polymers 0.000 abstract description 9
- 239000011347 resin Substances 0.000 abstract description 9
- 230000007423 decrease Effects 0.000 abstract description 4
- 238000010186 staining Methods 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 17
- -1 polyethylene Polymers 0.000 description 16
- 239000004698 Polyethylene Substances 0.000 description 15
- 229920000573 polyethylene Polymers 0.000 description 15
- 239000001993 wax Substances 0.000 description 13
- 239000003822 epoxy resin Substances 0.000 description 8
- 229920000647 polyepoxide Polymers 0.000 description 8
- 238000012546 transfer Methods 0.000 description 7
- 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 6
- 239000004593 Epoxy Substances 0.000 description 5
- 229930185605 Bisphenol Natural products 0.000 description 4
- 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 4
- 238000004140 cleaning Methods 0.000 description 3
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 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
- 239000006229 carbon black Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 244000208060 Lawsonia inermis Species 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910002065 alloy metal Inorganic materials 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 239000000987 azo dye Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007580 dry-mixing Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000000295 emission spectrum Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000002209 hydrophobic effect Effects 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
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Developing Agents For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、磁気印字方式に使用される閃光定着が可能な
磁気潜像現像用磁性トナーに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic toner for developing a magnetic latent image which is used in a magnetic printing system and is capable of flash fixing.
７ 〔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
気印字方式が開発され、実用化されている。磁気印字方
式は、記録媒体である磁気ドラム上に、情報信号を磁気
ヘットにより書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像する工程と。7 [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 the steps of writing information signals onto a magnetic drum, which is a recording medium, using a magnetic head to form a magnetic latent image, and developing the magnetic latent image using a one-component magnetic toner.
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、同５５−１０８６８
１号参照）この磁気印字方式は、電子写真方式における
ような数万枚コピー毎の感光体の交換が不要であり、メ
インテナンスが容易であるという利点を有する。The method includes a step of transferring the toner image onto a transfer sheet, a step of fixing the transferred toner image, and a step of cleaning with the magnetic toner remaining on the magnetic drum after the transfer. (Unexamined Japanese Patent Publication No. 54-32328, No. 55-10868
(See No. 1) This magnetic printing method has the advantage that it is not necessary to replace the photoreceptor every tens of thousands of copies as in the electrophotographic method, and maintenance is easy.
磁気印字方式における定着方式は、電子写真方式におけ
ると同様に熱ロール定着方式、オーブン定着、閃光定着
方式あるいは圧力定着方式によって行なわれる。これら
のうちＸｅもしくはハロゲンガスの発光スペクトルを利
用した閃光定着方式は、２００〜３００Ｊ程度の熱量を
１００μｓｅｃ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。閃光定着方式に使用される磁性トナーは
、少ないエネルギーで良好な定着性を得るために、エポ
キシ樹脂等の軟化点の低い熱可塑性樹脂を用いている。The fixing method in the magnetic printing method is the same as in the electrophotographic method, such as a hot roll fixing method, an oven fixing method, a flash fixing method, or a pressure fixing method. Among these, the flash fixing method that uses the emission spectrum of Xe or halogen gas irradiates a heat amount of about 200 to 300 J in a short time of about 100 μsec, so it can heat efficiently with less heat loss from the irradiated object. It has advantages such as no fear of fire and quick start. The magnetic toner used in the flash fixing method uses a thermoplastic resin with a low softening point, such as an epoxy resin, in order to obtain good fixing properties with less energy.
上記の磁気印字方式においては、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ギャ
ップはできるだけ狭い方がよく、一般に５μｍ以下（実
用上１μｍ以下）とされている。In the above-mentioned magnetic printing method, a part of the magnetic lines of force generated by energizing the magnetic head leaks into the recording medium from the gap portion of the magnetic head, forming a magnetization pattern (latent image). Therefore, the gap between the magnetic head and the magnetic drum should be as narrow as possible, and is generally 5 μm or less (in practice, 1 μm or less).
ところが上述した低軟化点の熱可塑性樹脂と磁性粉とを
主体とする閃光定着可能な磁性トナーを使用した場合、
磁気ヘッドにトナーが付着し、トナーがそのまま融着す
るという現象が生ずる。これは、磁気印字を行なう際に
転写後クリーニングプレー１〜を磁気ドラムに押圧して
残留磁性トナーを除去し、次いでクリーニングブレード
を磁気ドラムから離間せしめて磁気ヘッドを走査して潜
像を形成することに起因する。However, when using a flash-fixable magnetic toner that is mainly composed of a thermoplastic resin with a low softening point and magnetic powder, as described above,
A phenomenon occurs in which toner adheres to the magnetic head and is fused as it is. When performing magnetic printing, after the transfer, the cleaning blade 1 is pressed against the magnetic drum to remove residual magnetic toner, and then the cleaning blade is separated from the magnetic drum and the magnetic head is scanned to form a latent image. This is due to this.
すなわちブレードがドラムから離れる時にブレードに溜
ったトナーがこぼれ落ちることによる。That is, when the blade separates from the drum, the toner accumulated on the blade spills out.
このように磁気ヘッドにトナーが付着したままで印字を
行なうと、見掛は上磁気ドラムと磁気ヘッドとのギャッ
プが拡がることになり、磁性トナーを吸引する力が弱ま
って画像濃度が低下してしまう。If you print with toner still attached to the magnetic head in this way, the gap between the magnetic drum and the magnetic head will apparently widen, which weakens the force that attracts the magnetic toner and lowers the image density. Put it away.
したがって、本発明の目的は、磁気ヘッドへの１〜ナー
の付着が少なくでき、もって高い濃度の画像が得られる
閃光定着型磁性１−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 flash fixing type magnetic 1-toner that can reduce the amount of 1-toner attached to a magnetic head and thereby produce images with high density.
本発明の磁性トナーは、磁気潜像を現像し。 The magnetic toner of the present invention develops a magnetic latent image.
転写してから閃光定着を行なうことにより最終画像を得
る磁気印字方式に用いられる磁性トナーであって、熱可
塑性樹脂と磁性粉を含有するトナー粒子の表面に１，５
００〜１２，０００の範囲の分子量を有するポリエチレ
ン樹脂を固着させたことを特徴とするものである。A magnetic toner used in a magnetic printing method that obtains a final image by performing flash fixing after transfer.
It is characterized by being fixed with a polyethylene resin having a molecular weight in the range of 00 to 12,000.
本発明者は、磁気印字方式における磁気ヘッドの汚れを
防止すべく種々検討した結果、定着用樹脂と磁性粉を含
むトナー粒子の表面にポリエチレン樹脂を固着させるこ
とが有効であることを見出した。As a result of various studies to prevent staining of the magnetic head in a magnetic printing system, the present inventor found that it is effective to adhere a polyethylene resin to the surface of toner particles containing a fixing resin and magnetic powder.
表面にポリエチレン樹脂を固着した磁性トナーを用いて
磁気潜像の現像を行なうと、トナーが磁気ヘッドに一時
的に付着するが、ポリエチレンは冷却面収縮する性質を
持っているので、容易に剥離し、磁気ヘッドへの融着は
解消される。When a magnetic latent image is developed using magnetic toner with polyethylene resin adhered to its surface, the toner temporarily adheres to the magnetic head, but since polyethylene has the property of shrinking on the cooling surface, it is easily peeled off. , the fusion to the magnetic head is eliminated.
トナー粒子の表面に固着するポリエチレン樹脂は、１，
５００〜１２，０００の範囲の分子量を有することが必
要である。分子量が １，５００未満であると、ポリエ
チレンが軟らかいので、トナーの凝集が生じ易くなり、
保存安定性の低下を招く。分子量が１２，０００を越え
ると。The polyethylene resin that adheres to the surface of the toner particles is 1,
It is necessary to have a molecular weight in the range of 500 to 12,000. If the molecular weight is less than 1,500, the polyethylene is soft and the toner tends to aggregate.
This results in decreased storage stability. When the molecular weight exceeds 12,000.
ポリエチレンが固いので、１〜ナーの定着が困難となる
。Since polyethylene is hard, it is difficult to fix 1 to 3 toner.
このようなポリエチレンは、トナー粒子１゜０重量部当
り０．１〜５重量部の範囲でトナー粒子の表面に固着さ
せることが望ましい。固着量が０．１重量部未満ではそ
の効果が少なく。Such polyethylene is preferably fixed to the surface of the toner particles in an amount of 0.1 to 5 parts by weight per 10 parts by weight of the toner particles. If the amount of adhesion is less than 0.1 part by weight, the effect will be small.
固着量が５重量部を越えると定着性が低下する。If the amount of adhesion exceeds 5 parts by weight, the fixing performance will decrease.
またポリエチレンは、トナー粒子の内部に添加してもよ
く、これにより磁気ヘッドへの付着は更に防止できる。Further, polyethylene may be added inside the toner particles, thereby further preventing adhesion to the magnetic head.
添加量は一般に５重量部以下がよい。The amount added is generally 5 parts by weight or less.
次に、トナー粒子は必須成分として定着用樹脂および磁
性粉を含有する。Next, the toner particles contain a fixing resin and magnetic powder as essential components.
定着用樹脂は、フラッシュランプによる定着を可能とす
るために、比較的軟化点の熱可塑性樹脂、例えば、ビス
フェノール型エポキシ樹脂。The fixing resin is a thermoplastic resin with a relatively softening point, such as a bisphenol type epoxy resin, in order to enable fixing with a flash lamp.
スチレン変性エポキシ樹脂、オイル変性エポキシ樹脂等
のエポキシ樹脂、シリコン添加アミドワックスが使用で
きる。これらの内ではエポキシ樹脂、特にビスフェノー
ル型エポキシ樹脂が一般に使用されている。エポキシ樹
脂の内でもエポキシ当量が７００〜４，０００の範囲に
あるものが望ましい。エポキシ当量が７００未満では、
樹脂が軟らかくなりすぎて保存安定性が低下し、エポキ
シ当量が４，０００ を越えると定着性が低下する。Epoxy resins such as styrene-modified epoxy resins and oil-modified epoxy resins, and silicone-added amide waxes can be used. Among these, epoxy resins, particularly bisphenol type epoxy resins, are generally used. Among epoxy resins, those having an epoxy equivalent in the range of 700 to 4,000 are desirable. When the epoxy equivalent is less than 700,
If the resin becomes too soft, the storage stability will be reduced, and if the epoxy equivalent exceeds 4,000, the fixing performance will be reduced.
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１−、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が使用できるが、トナー中
に含有せしめるために平均粒径０．１〜３μｍ程度の粒
子がよい。As the magnetic powder, alloys or compounds containing ferromagnetic elements such as ferrite, magnetite, iron, cobal 1-, nickel, etc. can be used, but in order to incorporate them into the toner, an average particle size of 0.1 Particles of about 3 μm are preferable.
磁性粉の含有量は４０〜７５重景％の重量が適当である
。４０重量％未満では、トナーの磁力が弱まってスリー
ブから離脱し易くなり、カブリが増大し、また搬送性が
低下する。７５重重量を越えると、定着性が低下する。The content of the magnetic powder is suitably 40 to 75% by weight. If it is less than 40% by weight, the magnetic force of the toner will be weakened and the toner will easily separate from the sleeve, resulting in increased fog and poor conveyance. If the weight exceeds 75 weight, fixing performance will decrease.
本発明のトナー粒子は上記成分の他に、流動性改ｉ剤（
例えば疎水性シリカ）、導電性粒子（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、合金属
アゾ染料）等の公知の添加物の１種又は２種以上を１〜
ナ一粒子の内部および／又は表面に添加してもよい。添
加量は、定着性を阻害しないために１０重量％以下が適
当である。In addition to the above-mentioned components, the toner particles of the present invention contain a fluidity modifier (
One or more of known additives such as hydrophobic silica), conductive particles (e.g. carbon black), charge control agents (e.g. nigrosine dye, alloy metal azo dye), etc.
It may be added inside and/or on the surface of the particles. The amount added is suitably 10% by weight or less so as not to impair fixing properties.
本発明の磁性トナーは１例えば次のようにして製造する
ことができる。The magnetic toner of the present invention can be manufactured, for example, as follows.
まず定着用樹脂と磁性粉を含む原料を乾式混合し、加熱
混練後冷却固化してから粉砕する。First, raw materials including fixing resin and magnetic powder are dry mixed, heated, kneaded, cooled and solidified, and then pulverized.
得られた粉砕粉を熱処理し次いで分級して所定粒度のト
ナー粒子を得る。The obtained pulverized powder is heat treated and then classified to obtain toner particles of a predetermined particle size.
次に上記トナー粒子と粒状のポリエチレン樹脂とを乾式
混合することにより、トナー粒子の表面にポリ；チレン
使脂が固着した磁性トナーが得られる。Next, by dry mixing the toner particles and granular polyethylene resin, a magnetic toner in which polyethylene resin is adhered to the surface of the toner particles is obtained.
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１０１４Ω・１以上の体積抵抗を有することが好ま
しい。この抵抗値は、試料を少量（数１０■）計り取り
、ダイアルゲージを改良した内径３．０５ａｍ（断面積
＝０．０７３ａｌｌ）のテフロン（商品名）製絶縁シリ
ンダー中に充填し、Ｏ，１ｋｇの荷重を印加し、Ｄ、Ｃ
４ＫＶ／ａｎの電場で測定したものである。測定には横
河ヒューレットパッカード製絶縁抵抗計（４３２９Ａ型
）を用いた。The magnetic toner of the present invention preferably has a volume resistivity of 10 14 Ω·1 or more in order to facilitate transfer to plain paper. This resistance value was determined by weighing a small amount of the sample (several tens of square meters), filling it in a Teflon (trade name) insulating cylinder with an inner diameter of 3.05 am (cross-sectional area = 0.073 all) equipped with an improved dial gauge, and weighing O, 1 kg. Apply a load of D, C
It was measured in an electric field of 4KV/an. For the measurement, an insulation resistance meter (Model 4329A) manufactured by Yokogawa Hewlett-Packard was 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（表面電位）は第１図に示す装置によって測定
する。同図において、１は非磁性スリーブ（外径５０Ｉ
ＩｆｆｉＩφ）、２は永久磁石部材（外径４６ｍ、長さ
１５０Ｉ、１２ｍ対称着磁、スリーブ上の磁束密度１，
０００Ｇ）、３は表面電位計（トレック３４４）。Further, the magnetic toner of the present invention desirably has a charging voltage within ±25 V in order to reduce fog. This charging voltage (surface potential) is measured by the apparatus shown in FIG. In the same figure, 1 is a non-magnetic sleeve (outer diameter 50I)
IffiIφ), 2 is a permanent magnet member (outer diameter 46m, length 150I, 12m symmetrical magnetization, magnetic flux density on sleeve 1,
000G), 3 is a surface electrometer (Trek 344).
４は測定子である。而してスリーブ１と測定子４との間
の間隙ｇを５ｍ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１ 、 ＯＯＯｒ、ｐ、
ｍ、で１分間回転させた時のトナーの表面電位を測定す
る。4 is a measuring head. After adjusting the gap g between the sleeve 1 and the probe 4 to 5 m, 3 g of toner is supplied onto the sleeve 1, and the permanent magnet member 2 is set to 1, OOOr,p,
The surface potential of the toner is measured when the toner is rotated for 1 minute at m.
以下本発明の詳細を実施例によって説明するが１本発明
はこれらの例に限定されるものではない。The details of the present invention will be explained below with reference to examples, but the present invention is not limited to these examples.
λ１肛
ビスフェノール型エポキシ槓脂（シェル化学製エピコー
ト１００４Ｋ、エポキシ当量＝９５０）４０重量部とマ
グネタイト（戸田工業製ＥＰＴ５００）６０重量部を乾
式混合し、パンバリにて１００℃の温度で混練した。混
線物を冷却固化した後ジェットミルにて２０μｍ以下の
粒子に粉砕し、分級して平均粒径１５μｒｎのトナー粒
子を得た。このトナー粒子に中密度余りエチレンワック
ス（分子量４，０００）の粒子を加えて混合することに
より、トナー粒子の表面にポリエチレンワックス０．２
重量部を固着した。またｊｌＦｉ！像性を調整するた
めにカーボンブラック（三菱化成製３４４）０．１ 重
量部を同時に添加混合した。40 parts by weight of λ1 bisphenol type epoxy resin (Epicoat 1004K manufactured by Shell Chemical Co., Ltd., epoxy equivalent weight = 950) and 60 parts by weight of magnetite (EPT500 manufactured by Toda Kogyo Co., Ltd.) were dry mixed and kneaded at a temperature of 100° C. in a panburi machine. The mixed material was cooled and solidified, then ground into particles of 20 μm or less using a jet mill, and classified to obtain toner particles with an average particle size of 15 μrn. By adding and mixing particles of medium-density ethylene wax (molecular weight 4,000) to the toner particles, 0.2% of the polyethylene wax is coated on the surface of the toner particles.
The weight part was fixed. jlFi again! In order to adjust image quality, 0.1 part by weight of carbon black (Mitsubishi Kasei 344) was added and mixed at the same time.
得られた磁性１ヘナーの体積抵抗は、 １ｘ１０１４Ω
・■であり、又スリーブ上での帯電電圧は一１２Ｖであ
った。The volume resistivity of the obtained magnetic 1 henna is 1x1014Ω
・■, and the charging voltage on the sleeve was -12V.
Ｋ皿
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
と同様の条件で４種類の磁性トナー（Ｎα２〜５）を製
造した。ポリエチレンワックスの固着量は、Ｎα２のト
ナーが０．５ 重量部。Example 1 except that the amount of K-dish polyethylene wax added was changed.
Four types of magnetic toners (Nα2 to 5) were produced under the same conditions as above. The amount of polyethylene wax fixed to the Nα2 toner was 0.5 parts by weight.
Ｎα３の１−ナーが１重量部、Ｎα４のトナーが３重量
部、Ｎα５のトナーが５重量部であった。The Nα3 1-toner was 1 part by weight, the Nα4 toner was 3 parts by weight, and the Nα5 toner was 5 parts by weight.
割（性１
ビスフェノール型エポキシ樹脂（シェル化学製エピコー
ト１００７．エポキシ当ｆｆ１＝１９２０）３０重量部
、マグネタイト（戸田工業ｆｆＥＰＴ５００）６８重量
部、ポリエチレンワックス（分子ｆｆ１８，０００）２
重量部を乾式混合し、パンバリにて１００℃の温度で混
練した。混練物を冷却固化した後ジェノ１−ミルにて２
０μｍ以下の粒子に粉砕し、分級して平均粒径１５μｍ
のトナー粒子を得た。このトナー粒子に低密度ポリエチ
レンワックス（分子ｉ２，０００）の粒子を加えて混合
することにより、トナー粒子の表面にポリエチレンワッ
クス２重量部が固着した磁性トナー（Ｎα６）を得た。30 parts by weight of bisphenol type epoxy resin (Shell Chemical Co., Ltd. Epicoat 1007.Epoxy ff1=1920), 68 parts by weight of magnetite (Toda Kogyo ffEPT500), polyethylene wax (molecule ff18,000) 2
Parts by weight were dry mixed and kneaded at a temperature of 100°C in a panburi. After the kneaded material was cooled and solidified, it was heated in a Geno 1-mill.
Grind into particles of 0 μm or less and classify to obtain an average particle size of 15 μm.
toner particles were obtained. By adding particles of low density polyethylene wax (molecule i2,000) to the toner particles and mixing them, a magnetic toner (Nα6) in which 2 parts by weight of polyethylene wax was fixed to the surface of the toner particles was obtained.
政３ｕ」［
トナー粒子の表面にポリエチレンワックスを添加しない
以外は実施例１と同様の条件で磁性トナー（Ｎα６）を
得た。Magnetic toner (Nα6) was obtained under the same conditions as in Example 1 except that polyethylene wax was not added to the surface of the toner particles.
比較例２
１〜ナ一粒子の表面にポリエチレンワックスを６重量部
添加した以外は実施例１と同様の条件で磁性トナー（Ｎ
α８）を得た。Comparative Example 2 Magnetic toner (N
α8) was obtained.
上記の各磁性トナーを用いて、次のような条件で連続１
万枚の画像評価を行なった。Using each of the above magnetic toners, one continuous test was carried out under the following conditions.
We evaluated 10,000 images.
アルミニウム合金製ドラム上ににｏ−Ｎ１ｒを形成した
磁気ドラム（外径２５０Ｔｒｎ）を周速１５０ ｎｕ／
ｓｅｃの条件で回転させ、磁気ヘッドにより画像の書き
込みを行なって磁気潜像を形成した。外径５０ｍのステ
ンレスｆｆ製スリーブの内部に外径４８ｍｍのバリウム
フェライト磁石（４極着磁、スリーブ上の磁束密度は現
像ｍ極が６０Ｇ、他は５００Ｇ）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。ここでドクターギャップは０．８ｍに、現像ギャッ
プは０．６ｍに設定し、スリーブを現像部で磁気ドラム
と同方向に８０ｒ、ｐ。A magnetic drum (outer diameter 250 Trn) with o-N1r formed on an aluminum alloy drum was set at a circumferential speed of 150 nu/
It was rotated under the conditions of 1.0 sec and an image was written by a magnetic head to form a magnetic latent image. The developing device is equipped with a magnet roll that has a barium ferrite magnet with an outer diameter of 48 mm (magnetized with 4 poles, the magnetic flux density on the sleeve is 60 G for the developing m pole, and 500 G for the others) inside a stainless steel FF sleeve with an outer diameter of 50 m. , developed the magnetic latent image. Here, the doctor gap was set to 0.8 m, the developing gap was set to 0.6 m, and the sleeve was rotated 80 r, p in the same direction as the magnetic drum in the developing section.
Ｊ、で回転させた６現像して得られたトナー像は６ＫＶ
の転写電圧で杼道紙上にコロナ転写した。The toner image obtained by developing 6 with rotation at J is 6KV.
Corona transfer was carried out on the shuttle paper at a transfer voltage of .
Ｘｅランプ定着機（コンデンサー容量１，２００μＦ、
７４０Ｖ）により約２５０Ｊのエネルギーを照射して定
着を行なった。得られた画像のＪ￥価結果を表−１に示
す。Xe lamp fixing machine (capacitor capacity 1,200μF,
Fixing was performed by irradiating energy of about 250 J with 740 V). Table 1 shows the J value results of the obtained images.
以下余白
表−１から、特定の分子量を有するポリエチレンワック
スを５重量部までの範囲でトナー粒子の表面に固着した
磁性トナー（Ｎα１〜６）では、１万枚の連続印字でも
磁気ヘッドの汚れは極めて少なく、高い画像濃度が得ら
れることがわかる。これに対して、ポリエチレンワック
スを添加しない磁性トナー（Ｎα７）では、磁気ヘッド
の汚れが目立ち１画像１度が低下してしまう。またポリ
エチレンワックスの添加量が多い磁性トナー（＆８）で
は定着性が低下してしまう。From the Margin Table 1 below, it can be seen that with magnetic toner (Nα1 to 6) in which up to 5 parts by weight of polyethylene wax having a specific molecular weight is fixed to the surface of the toner particles, the magnetic head is not contaminated even after continuous printing of 10,000 sheets. It can be seen that high image density can be obtained with extremely little amount. On the other hand, with the magnetic toner (Nα7) to which polyethylene wax is not added, stains on the magnetic head become noticeable and the image quality per image decreases. Furthermore, in the case of magnetic toner (&8) containing a large amount of polyethylene wax, the fixing performance is lowered.
以上に記述の如く１本発明の磁性トナーは。 As described above, one of the magnetic toners of the present invention is as follows.
１−ナー粒子の表面にポリエチレンワックスを添加して
いるので、磁気ヘッドの汚れを防止し。Polyethylene wax is added to the surface of the 1-ner particles to prevent staining of the magnetic head.
高品質の画像を得ることができる。High quality images can be obtained.
第１図はトナーの表面電位測定装置を示す断面図である
。FIG. 1 is a sectional view showing a toner surface potential measuring device.
Claims (2)
面に１，５００〜１２，０００の範囲の分子量を有する
ポリエチレン樹脂を固着させたことを特徴とする閃光定
着型磁気潜像現像用磁性トナー。(1) Magnetism for flash fixing type magnetic latent image development characterized by fixing a polyethylene resin having a molecular weight in the range of 1,500 to 12,000 on the surface of toner particles containing a thermoplastic resin and magnetic powder. toner.
ポリエチレン樹脂をトナー粒子の表面に固着させる特許
請求の範囲第１項記載の閃光定着型磁気潜像現像用磁性
トナー。(2) The flash fixing type magnetic toner for developing magnetic latent images according to claim 1, wherein 0.1 to 5 parts by weight of polyethylene resin per 100 parts by weight of toner particles is fixed to the surface of the toner particles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61205642A JP2564522B2 (en) | 1986-09-01 | 1986-09-01 | Magnetic toner for developing flash latent magnetic latent image |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61205642A JP2564522B2 (en) | 1986-09-01 | 1986-09-01 | Magnetic toner for developing flash latent magnetic latent image |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6361266A true JPS6361266A (en) | 1988-03-17 |
| JP2564522B2 JP2564522B2 (en) | 1996-12-18 |
Family
ID=16510272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61205642A Expired - Lifetime JP2564522B2 (en) | 1986-09-01 | 1986-09-01 | Magnetic toner for developing flash latent magnetic latent image |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2564522B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02235067A (en) * | 1989-03-09 | 1990-09-18 | Sharp Corp | Toner for electrophotography |
| US5062519A (en) * | 1989-05-31 | 1991-11-05 | Mitsubishi Denki Kabushiki Kaisha | Escalator system with convertible step unit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5779957A (en) * | 1980-11-07 | 1982-05-19 | Canon Inc | Developing powder for flash fixing |
| JPS5784460A (en) * | 1980-11-13 | 1982-05-26 | Matsushita Electric Ind Co Ltd | Dry type developer |
| JPS57111542A (en) * | 1980-12-27 | 1982-07-12 | Canon Inc | Flash fixing toner |
-
1986
- 1986-09-01 JP JP61205642A patent/JP2564522B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5779957A (en) * | 1980-11-07 | 1982-05-19 | Canon Inc | Developing powder for flash fixing |
| JPS5784460A (en) * | 1980-11-13 | 1982-05-26 | Matsushita Electric Ind Co Ltd | Dry type developer |
| JPS57111542A (en) * | 1980-12-27 | 1982-07-12 | Canon Inc | Flash fixing toner |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02235067A (en) * | 1989-03-09 | 1990-09-18 | Sharp Corp | Toner for electrophotography |
| US5062519A (en) * | 1989-05-31 | 1991-11-05 | Mitsubishi Denki Kabushiki Kaisha | Escalator system with convertible step unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2564522B2 (en) | 1996-12-18 |
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