JP3670023B2 - Method for producing toner for developing electrostatic image - Google Patents
Method for producing toner for developing electrostatic image Download PDFInfo
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- JP3670023B2 JP3670023B2 JP05569593A JP5569593A JP3670023B2 JP 3670023 B2 JP3670023 B2 JP 3670023B2 JP 05569593 A JP05569593 A JP 05569593A JP 5569593 A JP5569593 A JP 5569593A JP 3670023 B2 JP3670023 B2 JP 3670023B2
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- 239000000843 powder Substances 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 24
- 238000005469 granulation Methods 0.000 claims description 16
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- 239000002245 particle Substances 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 11
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- 239000002994 raw material Substances 0.000 description 10
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- 238000004898 kneading Methods 0.000 description 5
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- 108091008695 photoreceptors Proteins 0.000 description 5
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
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- 239000000696 magnetic material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
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- 238000006116 polymerization reaction Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910002012 Aerosil® Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 1
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- 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 1
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- NYGZLYXAPMMJTE-UHFFFAOYSA-M metanil yellow Chemical group [Na+].[O-]S(=O)(=O)C1=CC=CC(N=NC=2C=CC(NC=3C=CC=CC=3)=CC=2)=C1 NYGZLYXAPMMJTE-UHFFFAOYSA-M 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
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Description
【０００１】
【産業上の利用分野】
本発明は電子写真法、静電記録等において使用される静電荷像現像用トナーの製造方法に関するものである。
【０００２】
【従来の技術】
電子複写機等で使用される現像剤は、その現像工程において、例えば静電荷像が形成されている感光体等の像担持体に一旦付着され、次に転写工程において感光体から転写紙に転写された後、定着工程においてコピー紙面に定着される。その際、潜像保持面上に形成される静電荷像を現像するための現像剤として、キャリアとトナーから成る二成分現像剤及びキャリアを必要としない一成分現像剤（磁性トナー、非磁性トナー）が知られている。
【０００３】
トナー粒子の製造方法には、大きく分類してトナーを混練後粉砕する機械式粉砕法とトナー粒子を重合時に造粒する重合法とが知られているが、一般的には前者の製造方法が製造効率、各種トナーへの適用範囲が広いなどの理由で主流を占めている。このトナーの製造方法の一例を図１に示す。原料配合・混合工程、混練工程、冷却工程を経て得られたペレット状トナーは、その後粉砕工程で１０数μｍ程度にまで粉砕され、所定の粒径のトナーのみ製品化するため分級される。この分級工程で分離されるトナー微粉は従来のトナー製造方法では再利用されていなかったが、近年、経済性及び環境性などの理由で再利用される事が望まれる様になり、例えば、トナー微粉は原料配合・混合工程にリサイクルされ使用されていた。
【０００４】
【発明が解決しようとする課題】
しかしなから、近年は複写物・印刷物等の高画質化に伴いトナー粒子径が小粒径化すること、及び低エネルギー定着を達成するためにトナーの軟化（粘性が低下）による過粉砕化などでトナー微粉発生量が多くなる為に、従来よりトナー微粉リサイクル量が多量になることでトナー生産性及びトナー性能への影響が大きくなる傾向にある。つまり、トナー微粉を再利用しない場合に比べて、再利用する場合にはトナー微粉の嵩密度が小さいことで、トナー原料を混ぜた時に原料全体の嵩密度も小さくなる。それにより連続式押出機などの混練機への原料食い込みが悪化するので、押出量の低下による生産性の悪化、混練時の負荷が低下し、トナー中添加剤と微粉自身の分散不良を招く。また、適度な帯電量の安定性を有せず、連続コピー時の画像安定性が悪く、更に、高温・高湿環境下で感光体にトナー成分が付着するフィルミング現象を生じるなどのトナー性能悪化の問題があった。
【０００５】
すなわち、本発明の目的は、トナー微粉が多量な場合でも作業環境を損なうことなくリサイクルでき、トナー生産性を低下しないトナー製造方法を提供することにある。他の目的は、トナー中内添剤と微粉が高度で安定した水準に分散したトナー製造方法を提供することにある。更に他の目的は、連続複写、印刷時の優れた画像安定性を示し、使用環境変化に対しても安定した性能を示すトナー製造方法を提供することにある。
【０００６】
【課題を解決するための手段】
しかしてかかる本発明の目的は、本発明者らが種々鋭意検討した結果、トナー微粉を適度に造粒した後リサイクルしてトナー原料と混合して再利用することにより達成されることを見いだした。
すなわち、本発明の要旨は、トナー製造過程で発生するトナー微粉を脱気して、加熱せず圧縮造粒した後、トナー製造工程にリサイクルすることを特徴とする静電荷像現像用トナーの製造方法に存する。
【０００７】
【作用】
以下、本発明を詳細に説明する。
まず、本発明のトナー製造方法について図２に従い説明するが、その要旨を超えない限り以下の説明に何等制限されるものではない。
トナーの内添剤としては、少なくとも樹脂、着色剤を所定量秤量して配合し、混合する。混合装置の一例としては、ダブルコン・ミキサー、Ｖ型ミキサー、ドラム型ミキサー、スーパーミキサー、ヘンシェルミキサー、ナウターミキサー等がある。
【０００８】
樹脂としては、トナーに適した公知の種々のものが使用できるが、例えばスチレン・アクリル系樹脂、飽和もしくは不飽和のポリエステル系樹脂、エポキシ樹脂等を挙げることができる。
着色剤としては公知の顔料、染料を用いればよく、例えば、カーボンブラック、フタロシアニンブルー、フタロシアニングリーン、ローダミン系染料、モノアゾ及びジスアゾ系染顔料などを相当するトナーの色に着色剤を単独または混合して併用し、着色剤の含有量は樹脂１００重量部に対して１〜２０重量部とするのが好ましく、更には、３〜１５重量部が好適である。
【０００９】
更に、必要に応じてその他内添剤を単独または併用して使用してもよく、例えば正・負の公知の帯電制御剤、離型剤の低分子量オレフィン重合体等を挙げることができる。
次に、混練工程では、バッチ式（例えば、加圧ニーダー、バンバリィミキサー等）または連続式の練り機を用いるが、特に連続式練り機を用いた時に本発明は有効に作用する。連続式練り機は、連続生産できる等の優位性から、近年は１軸または２軸押出機が主流であり、例えば、神戸製鋼所社製ＫＴＫ型２軸押出機、東芝機械社製ＴＥＭ型押出機、ケイ・シー・ケイ社製２軸押出機、池貝鉄工社製ＰＣＭ型２軸押出機、ブス社製コ・ニーダー等がよい。
【００１０】
練り後、トナーは２本ロール等で圧延され、水冷等で冷却する冷却工程を経る。
次いで、粉砕工程では、クラッシャー、ハンマーミル、フェザーミルー等で粗粉砕し、ジェットミル、高速ローター回転式ミル等で細粉砕し、段階的に所定トナー粒度まで粉砕する。
【００１１】
粉砕後、慣性分級方式のエルボジェット、遠心力分級方式のミクロプレックス、ＤＳセパレーター等でトナーを分級し、平均粒子径３〜２０μｍのトナーを得る。分級工程で分離されたトナー粗粉は粉砕工程に戻し、トナー微粉は造粒工程を経て再利用する。
更に、トナーに外添処理する場合には、分級トナーと公知の各種外添剤を所定量配合して、ヘンシェルミキサー、スーパーミキサー等の高速撹拌機などで撹拌・混合すればよい。
【００１２】
トナー微粉の造粒工程は、一例を図５、図６に示すが、給送工程と圧縮造粒工程から構成され、給送工程或いは／並びに圧縮造粒工程に脱気機構を具備してなり、所定供給速度で給送されるトナー微粉を十分に脱気させながら任意の圧力に設定されたロール等の間隙を通過することで適度な造粒度に圧縮造粒される。
圧縮造粒装置の一例を図７に示す。
【００１３】
脱気給送部１０の構成において、被処理物を供給口１２から筒状本体１１内に供給させ、回転する給送スクリュー１５によって排出口１４側へ圧送されると共に、途中に設けられた多孔質部１６を通過する時点で、真空ポンプなどの排気装置で真空室１３内を排気することで、被処理物の内部に含まれている気体がフィルターを介して真空室１３内に吸引脱気される。フィルターとしては、通常の場合金属粉、金属繊維、セラミックなどの焼結体が多く用いられる。脱気された被処理物が、一旦給送ホッパー２０を介して、その供給スクリュー２３によって供給され、圧縮造粒ロール３１により所定造粒度に造粒される。造粒度は各ロール３１相互の間隔、加圧力及び回転速度、並びに供給される被処理物の性状、供給速度などに対応して設定変更可能である。圧縮造粒ロール３１は必要に応じて濾過筒状に構成し、その内部から前記と同様に真空吸引することで脱気させることも可能である。
【００１４】
なお、圧縮造粒工程は図３、図４に示すようにトナー微粉以外の原料の造粒、トナー微粉と他の微細原料との混在での造粒にも応用してもよいが、本発明では少なくともトナー微粉を単独或いは他の微細原料混在での圧縮造粒することが必須である。原料にリサイクルするトナー微粉量は分級効率により変動するが、発生するトナー微粉の全量をリサイクルすることが可能である。トナー微粉の造粒度とは、造粒前に対する造粒後の嵩密度比率を意味し、１．１倍以上が好ましく、更に１．２倍以上、更には１．５倍以上が好適である。
【００１５】
得られたトナーは、キャリアを使用しない１成分系現像剤（マグネタイト等の磁性物を含有した磁性１成分トナー、または磁性物を含有しない非磁性１成分トナー）、或いは、鉄粉、フェライト、マグネタイト、磁性樹脂キャリア等の磁性キャリアと混合した２成分系現像剤として用いることができる。
【００１６】
【実施例】
下記実施例中、単に「部」とあるのはいずれも「重量部」を意味するものとする。
＜実施例１＞
リサイクル用造粒トナー微粉は、図７に示す圧縮造粒装置で造粒した。
【００１７】
【表１】
を配合し、Ｖ型ミキサーで混合し、連続２軸押出機を用いて混練し、冷却し、ジェットミル粉砕、風力分級して平均粒子径９μｍの黒色トナーを得た。この黒色トナー１００部に対してシリカ粉末（日本アエロジル（株）Ｒ９７２）０．２５部をヘンシェルミキサーにて外添してトナーＡを得た。得られたトナーＡ４部とメチルシリコーン含有樹脂で表面コートされた平均粒径１００μｍのフェライト粉キャリア１００部を混合、撹拌し現像剤を作製した。
【００１９】
次に、この現像剤について有機光導電体を感光体とし、ウレタン材質のブレートを設けたクリーニング装置を装着した、複写速度４０枚／分の複写機を用いて、高温高湿環境（温度３５℃、湿度８５％ＲＨ）下で５０，０００枚の実写テストを実施した。その結果、５０，０００枚を通じて画像濃度が安定して高く、カブリの増加もなく、感光体の汚れもなく、耐久性能に優れた現像剤、トナーであった。
【００２０】
＜比較例１＞
実施例１の造粒トナー微粉にかえて造粒なしのトナー微粉２５部とした以外は実施例１と同様にトナー、現像剤を作製して、同様の実写テストを実施した。その結果、約３０，０００枚過ぎより感光体にフィルミングが発生し、カブリも増加して、機内のトナー飛散が目立ちだし、問題あった。
【００２１】
【発明の効果】
本発明の静電荷像現像用トナーの製造方法を用いることにより、トナー生産性、作業環境等が改善され、トナー中の添加剤や微粉の分散性がよくなり、トナーの画質が連続使用時でも安定しており、機内汚染や感光体汚染がなく優れたトナー性能を与えるなど多大な工業的利益を提供するものである。
【図面の簡単な説明】
【図１】従来のトナー製造方法を示した製造フローの一例
【図２】本発明のトナー製造方法を示した製造フローの一例
【図３】本発明のトナー製造方法の一例
【図４】本発明のトナー製造方法の一例
【図５】本発明のトナー製造工程の内で造粒工程を示した一例
【図６】本発明のトナー製造工程の内で造粒工程を示した一例
【図７】実施例１での圧縮造粒装置の一例であり、縦断面図
【符号の説明】
１０ 脱気給送部
１１ 筒状粉体
１２ 供給口
１３ 真空室
１４ 排出口
１５ 給送スクリュー
１６ 多孔質部
２０ 給送ホッパー部
２１ ホッパー
２２ 撹拌羽根
２３ 供給スクリュー
３０ 圧縮造粒成形部
３１ 圧縮造粒ロール[0001]
[Industrial application fields]
The present invention relates to a method for producing an electrostatic charge image developing toner used in electrophotography, electrostatic recording and the like.
[0002]
[Prior art]
The developer used in an electronic copying machine or the like is temporarily attached to an image carrier such as a photoreceptor on which an electrostatic charge image is formed in the development process, and then transferred from the photoreceptor to transfer paper in the transfer process. Then, it is fixed on the copy paper surface in the fixing step. At that time, as a developer for developing an electrostatic charge image formed on the latent image holding surface, a two-component developer composed of a carrier and a toner and a one-component developer not requiring a carrier (magnetic toner, non-magnetic toner) )It has been known.
[0003]
The toner particle production methods are broadly classified into a mechanical pulverization method in which the toner is kneaded and then pulverized, and a polymerization method in which the toner particles are granulated at the time of polymerization, and the former production method is generally used. It dominates for reasons such as manufacturing efficiency and wide application range to various toners. An example of this toner manufacturing method is shown in FIG. The pellet-like toner obtained through the raw material blending / mixing step, kneading step, and cooling step is then pulverized to about a few tens of μm in the pulverization step, and classified to produce only a toner having a predetermined particle diameter. The toner fine powder separated in the classification process has not been reused in the conventional toner manufacturing method, but recently, it has been desired to be reused for reasons of economy and environment. The fine powder was recycled and used in the raw material blending and mixing process.
[0004]
[Problems to be solved by the invention]
However, in recent years, the toner particle size has been reduced with the increase in image quality of copies and printed materials, and over-pulverization due to toner softening (decrease in viscosity) to achieve low energy fixing. Therefore, since the amount of toner fine powder generated increases, the amount of toner fine powder recycled becomes larger than before, and the influence on toner productivity and toner performance tends to increase. In other words, when the toner fine powder is reused, the bulk density of the toner fine powder is small. Therefore, when the toner raw materials are mixed, the bulk density of the whole raw material is also reduced. As a result, the raw material bite into a kneading machine such as a continuous extruder deteriorates, so that the productivity deteriorates due to a decrease in the amount of extrusion and the load during kneading decreases, leading to poor dispersion of the additive in the toner and the fine powder itself. In addition, the toner performance does not have an appropriate charge amount stability, the image stability during continuous copying is poor, and the filming phenomenon that the toner component adheres to the photoreceptor in a high temperature and high humidity environment. There was a problem of deterioration.
[0005]
That is, an object of the present invention is to provide a toner manufacturing method that can be recycled without impairing the working environment even when the amount of toner fine powder is large, and that does not reduce toner productivity. Another object is to provide a toner production method in which the internal additives and fine powder in the toner are dispersed at a high and stable level. Still another object is to provide a toner production method that exhibits excellent image stability during continuous copying and printing, and exhibits stable performance against changes in the use environment.
[0006]
[Means for Solving the Problems]
Thus, as a result of various studies by the present inventors, it has been found that the toner fine powder is appropriately granulated, recycled, mixed with the toner raw material and reused. .
That is, the gist of the present invention is to produce a toner for developing an electrostatic charge image, wherein the toner fine powder generated in the toner production process is degassed, compressed and granulated without heating, and then recycled to the toner production process. Lies in the way.
[0007]
[Action]
Hereinafter, the present invention will be described in detail.
First, the toner manufacturing method of the present invention will be described with reference to FIG. 2, but the present invention is not limited to the following description as long as the gist thereof is not exceeded.
As an internal additive for the toner, at least a resin and a colorant are weighed and mixed in a predetermined amount and mixed. Examples of the mixing apparatus include a double-con mixer, a V-type mixer, a drum-type mixer, a super mixer, a Henschel mixer, and a Nauter mixer.
[0008]
Various known resins suitable for toner can be used as the resin, and examples thereof include styrene / acrylic resins, saturated or unsaturated polyester resins, and epoxy resins.
Known pigments and dyes may be used as the colorant. For example, carbon black, phthalocyanine blue, phthalocyanine green, rhodamine dyes, monoazo and disazo dyes and the like may be used alone or mixed with the corresponding toner color. The content of the colorant is preferably 1 to 20 parts by weight, more preferably 3 to 15 parts by weight, based on 100 parts by weight of the resin.
[0009]
Further, if necessary, other internal additives may be used alone or in combination, and examples thereof include positive and negative known charge control agents and low molecular weight olefin polymers of release agents.
Next, in the kneading process, a batch type (for example, a pressure kneader, a Banbury mixer, etc.) or a continuous kneader is used, but the present invention works effectively when a continuous kneader is used. Due to the advantage of continuous production, continuous kneaders have been mainly single-screw or twin-screw extruders in recent years. For example, KTK type twin screw extruder manufactured by Kobe Steel, TEM type extruder manufactured by Toshiba Machine Co., Ltd. A machine, a twin-screw extruder manufactured by Kay Sea Kay, a PCM type twin-screw extruder manufactured by Ikekai Tekko, and a co-kneader manufactured by Buss are preferable.
[0010]
After kneading, the toner is rolled with a two-roll or the like, and is subjected to a cooling step of cooling with water cooling or the like.
Next, in the pulverization step, coarse pulverization is performed with a crusher, hammer mill, feather mill, or the like, fine pulverization is performed with a jet mill, a high-speed rotor rotary mill, or the like, and then pulverized to a predetermined toner particle size step by step.
[0011]
After pulverization, the toner is classified with an inertia class elbow jet, a centrifugal classification microplex, a DS separator, or the like to obtain a toner having an average particle diameter of 3 to 20 μm. The toner coarse powder separated in the classification process is returned to the pulverization process, and the toner fine powder is reused through the granulation process.
Further, when externally adding to the toner, a predetermined amount of the classified toner and various known external additives may be blended and stirred and mixed with a high-speed stirrer such as a Henschel mixer or a super mixer.
[0012]
An example of the granulation process of the toner fine powder is shown in FIGS. 5 and 6, and is composed of a feeding process and a compression granulation process, and a degassing mechanism is provided in the feeding process and / or the compression granulation process. The toner fine powder fed at a predetermined supply speed is compressed and granulated to an appropriate particle size by passing through a gap such as a roll set at an arbitrary pressure while sufficiently degassing.
An example of the compression granulator is shown in FIG.
[0013]
In the configuration of the degassing /
[0014]
The compression granulation step may be applied to the granulation of raw materials other than the toner fine powder as shown in FIGS. 3 and 4, and the granulation in a mixture of the toner fine powder and other fine raw materials. Then, it is essential to at least compress and granulate the toner fine powder alone or in a mixture of other fine raw materials. Although the amount of toner fine powder recycled to the raw material varies depending on the classification efficiency, it is possible to recycle the total amount of toner fine powder generated. The particle size of the toner fine powder means a bulk density ratio after granulation with respect to before granulation, preferably 1.1 times or more, more preferably 1.2 times or more, and further preferably 1.5 times or more. .
[0015]
The obtained toner is a one-component developer not using a carrier (a magnetic one-component toner containing a magnetic material such as magnetite or a non-magnetic one-component toner containing no magnetic material), or iron powder, ferrite, magnetite. And a two-component developer mixed with a magnetic carrier such as a magnetic resin carrier.
[0016]
【Example】
In the following examples, “parts” simply means “parts by weight”.
<Example 1>
Granulated toner fine powder for recycling was granulated with a compression granulator shown in FIG.
[0017]
[Table 1]
Were mixed using a V-type mixer, kneaded using a continuous twin-screw extruder, cooled, jet mill pulverized and air-classified to obtain a black toner having an average particle size of 9 μm. To 100 parts of this black toner, 0.25 part of silica powder (Nippon Aerosil Co., Ltd. R972) was externally added with a Henschel mixer to obtain toner A. 4 parts of the toner A obtained and 100 parts of a ferrite powder carrier having an average particle diameter of 100 μm and surface-coated with a methylsilicone-containing resin were mixed and stirred to prepare a developer.
[0019]
Next, a high temperature and high humidity environment (temperature 35 ° C.) was used using a copying machine with a copying speed of 40 sheets / min. , A real-life test of 50,000 sheets under a humidity of 85% RH. As a result, it was a developer and a toner having a stable and high image density through 50,000 sheets, no increase in fog, no contamination of the photoreceptor, and excellent durability.
[0020]
<Comparative Example 1>
A toner and a developer were prepared in the same manner as in Example 1 except that the granulated toner fine powder of Example 1 was replaced with 25 parts of non-granulated toner fine powder, and the same actual shooting test was performed. As a result, filming occurred on the photoconductor from over about 30,000 sheets, fogging increased, and toner scattering in the apparatus was noticeable, causing a problem.
[0021]
【The invention's effect】
By using the method for producing an electrostatic charge image developing toner of the present invention, the toner productivity, the working environment, etc. are improved, the dispersibility of additives and fine powder in the toner is improved, and the image quality of the toner is improved even when used continuously. It is stable and provides great industrial benefits such as excellent toner performance without in-machine contamination and photoreceptor contamination.
[Brief description of the drawings]
1 is an example of a manufacturing flow showing a conventional toner manufacturing method. FIG. 2 is an example of a manufacturing flow showing a toner manufacturing method of the present invention. FIG. 3 is an example of a toner manufacturing method of the present invention. FIG. 5 shows an example of the granulation process in the toner production process of the present invention. FIG. 6 shows an example of the granulation process in the toner production process of the present invention. ] An example of a compression granulator in Example 1, and a longitudinal sectional view [Explanation of symbols]
DESCRIPTION OF
Claims (3)
造粒した後、トナー製造工程にリサイクルすることを特徴とする静電荷像現像用トナーの製造方法。A method for producing a toner for developing an electrostatic charge image, wherein the toner fine powder generated in the toner production process is sucked and degassed, compressed and granulated without heating, and then recycled to the toner production process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05569593A JP3670023B2 (en) | 1993-03-16 | 1993-03-16 | Method for producing toner for developing electrostatic image |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05569593A JP3670023B2 (en) | 1993-03-16 | 1993-03-16 | Method for producing toner for developing electrostatic image |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2005077957A Division JP2005215697A (en) | 2005-03-17 | 2005-03-17 | Method for producing toner for developing electrostatic image |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06266158A JPH06266158A (en) | 1994-09-22 |
| JP3670023B2 true JP3670023B2 (en) | 2005-07-13 |
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ID=13006035
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05569593A Expired - Lifetime JP3670023B2 (en) | 1993-03-16 | 1993-03-16 | Method for producing toner for developing electrostatic image |
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| Country | Link |
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| JP (1) | JP3670023B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8114565B2 (en) | 2008-02-29 | 2012-02-14 | Ricoh Company, Ltd. | Toner production method and toner granulating apparatus |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4938932B2 (en) * | 2001-03-09 | 2012-05-23 | 株式会社リコー | Masterbatch pigment, toner manufacturing method, color toner and manufacturing method thereof, image forming method, and image forming apparatus |
| JP2004033960A (en) * | 2002-07-04 | 2004-02-05 | Ricoh Co Ltd | Toner recycling method and toner recycling system |
-
1993
- 1993-03-16 JP JP05569593A patent/JP3670023B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8114565B2 (en) | 2008-02-29 | 2012-02-14 | Ricoh Company, Ltd. | Toner production method and toner granulating apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06266158A (en) | 1994-09-22 |
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