JP2002333735A - Method for producing toner - Google Patents
Method for producing tonerInfo
- Publication number
- JP2002333735A JP2002333735A JP2001136784A JP2001136784A JP2002333735A JP 2002333735 A JP2002333735 A JP 2002333735A JP 2001136784 A JP2001136784 A JP 2001136784A JP 2001136784 A JP2001136784 A JP 2001136784A JP 2002333735 A JP2002333735 A JP 2002333735A
- Authority
- JP
- Japan
- Prior art keywords
- binder resin
- release agent
- kneading
- melting point
- toner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Developing Agents For Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、複数の搬送部と混
練部に分割された２軸混練機により離型剤及び結着樹脂
を含む原材料を搬送、混練してトナーを製造するトナー
製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing toner by transporting and kneading raw materials including a release agent and a binder resin by a twin-screw kneader divided into a plurality of transport sections and a kneading section. About.
【０００２】[0002]
【従来の技術】図２は粉砕トナーの製造工程を説明する
ための図、図３は電子写真用トナーの基本構成を示す図
である。図２において、１１は結着樹脂、１２は着色
剤、１３は電荷制御剤、１４は離型剤（ワックス）、１
５は外添剤を示す。2. Description of the Related Art FIG. 2 is a view for explaining a manufacturing process of a pulverized toner, and FIG. 3 is a view showing a basic structure of an electrophotographic toner. In FIG. 2, 11 is a binder resin, 12 is a colorant, 13 is a charge control agent, 14 is a release agent (wax), 1
Reference numeral 5 denotes an external additive.
【０００３】電子写真用トナーは、例えば図２に示すよ
うに結着樹脂１１、着色剤１２、電荷制御剤１３、離型
剤１４を含む原材料をヘンシェルミキサーやボールミル
などを用いてブレンドし、２軸混練機により熱をかけ、
材料がよく混ざるように溶融混練し、冷却されたトナー
ペレットをジェットミル、機械式粉砕装置などを用いて
任意の大きさに粉砕する。さらに、気流分級機などを用
いて粉砕されたトナーを任意の粒度分布に分級し、ヘン
シェルミキサーを用いてトナーと外添剤１５を混合し
て、任意の流動性、帯電性を付与し、さらに熱風処理、
機械式処理装置などにより粒子形状を制御することによ
り得られる。For example, as shown in FIG. 2, an electrophotographic toner is prepared by blending raw materials including a binder resin 11, a colorant 12, a charge control agent 13, and a release agent 14 using a Henschel mixer or a ball mill. Apply heat with a shaft kneader,
The toner pellets are melt-kneaded so that the materials are well mixed, and the cooled toner pellets are pulverized to an arbitrary size using a jet mill, a mechanical pulverizer, or the like. Further, the pulverized toner is classified into an arbitrary particle size distribution using an airflow classifier or the like, and the toner and the external additive 15 are mixed using a Henschel mixer to impart arbitrary fluidity and chargeability. Hot air treatment,
It is obtained by controlling the particle shape with a mechanical processing device or the like.
【０００４】近年の傾向として、トナーの小粒径化、オ
イルを用いない定着機に対応するため離型剤の添加量の
増加、結着樹脂の低融点化がある。これらトナーの小粒
径化により、より微細な分散が求められ、離型剤の添加
量により再凝集が起こりやすくなるため分散が困難にな
り、より強力な剪断力が必要となる。また、結着樹脂の
融点が低く低粘度であるため剪断力が弱くなるため、離
型剤の分散が困難となるなどの問題が発生している。さ
らには、離型剤として、離型剤の軟化点＞結着樹脂の融
点である材料を用いる場合には、分散が比較的容易であ
るが、離型剤として、離型剤の軟化点＜結着樹脂の融点
である材料を選択する場合には、より分散が困難とな
る。[0004] Recent trends include a reduction in toner particle size, an increase in the amount of a release agent added to cope with a fixing machine that does not use oil, and a reduction in the melting point of a binder resin. By reducing the particle size of these toners, finer dispersion is required, and reaggregation is likely to occur depending on the amount of the release agent added, so that dispersion becomes difficult and a stronger shearing force is required. Further, since the melting point of the binder resin is low and the viscosity is low, the shearing force is weakened, so that problems such as difficulty in dispersing the release agent occur. Further, when a material having a softening point of the release agent> the melting point of the binder resin is used as the release agent, the dispersion is relatively easy, but the softening point of the release agent < When a material that is the melting point of the binder resin is selected, dispersion becomes more difficult.
【０００５】従来、２軸混練機における混練時の温度条
件（バレル設定温度及び押出し物の温度）と離型剤の軟
化点、結着樹脂の融点の関係は、例えば送りスクリュー
部と混練部での設定温度と結着樹脂の融点の関係や、排
出直後の混練物の温度と離型剤の軟化点の関係での検討
（特許第２９３９６０９号参照）、あるいは混練部・搬
送部のシリンダー温度と結着樹脂の粘度・温度の関係
や、混練部・搬送部のシリンダー温度、吐出物の温度と
離型剤の軟化点の関係での検討（特開平８−３０５０７
８号公報参照）がある程度にすぎない。[0005] Conventionally, the relationship between the temperature conditions (barrel setting temperature and extrudate temperature) during kneading in a twin-screw kneader, the softening point of the release agent, and the melting point of the binder resin is determined, for example, in the feed screw section and the kneading section. On the relationship between the set temperature of the binder resin and the melting point of the binder resin, the relationship between the temperature of the kneaded material immediately after discharge and the softening point of the release agent (see Japanese Patent No. 2939609), or the relationship between the cylinder temperature of the kneading unit and the transporting unit. A study was made on the relationship between the viscosity and temperature of the binder resin, the cylinder temperature of the kneading unit and the transporting unit, and the relationship between the temperature of the discharged material and the softening point of the release agent (JP-A-8-30507).
No. 8).
【０００６】[0006]
【発明が解決しようとする課題】しかし、これらは、混
練部までの搬送部において、原料を溶融状態にする、混
練部での結着樹脂の粘度を所望の範囲に保つことによ
り、必要十分な剪断力をかける、混練部においては、離
型剤を液体状にした方が良好な分散を得るのに好まし
い、混練部通過後の搬送部での離型剤の再凝集を防止す
る、押出し後の離型剤の再凝集を防止する、といった観
点から検討された結果である。However, these are required and sufficient by keeping the viscosity of the binder resin in the kneading section in a desired range by bringing the raw material into a molten state in the transport section to the kneading section. Applying shearing force, in the kneading section, it is preferable to make the release agent in a liquid state to obtain better dispersion, to prevent reaggregation of the release agent in the transport section after passing the kneading section, after extrusion This is a result of study from the viewpoint of preventing re-aggregation of the release agent.
【０００７】従来、離型剤の軟化点＞結着樹脂の融点が
一般的であり、これは、離型剤の軟化点を結着樹脂の融
点より高く設定し、混練中の離型剤の粘度を高く保つこ
とで、分散をよくするための手法である（例えば特開平
６−９５４３３号公報参照）。上記従来例も、このよう
な離型剤の軟化点＞結着樹脂の融点といった実施例にお
いては、良好な結果が得られている。Conventionally, the softening point of the release agent is generally higher than the melting point of the binder resin. This is because the softening point of the release agent is set higher than the melting point of the binder resin, and the melting point of the release agent during kneading is set. This is a technique for improving the dispersion by keeping the viscosity high (see, for example, JP-A-6-95433). Also in the above-mentioned conventional examples, good results are obtained in the examples in which the softening point of the release agent is higher than the melting point of the binder resin.
【０００８】しかし、離型剤の軟化点＜結着樹脂の融点
の場合には、結着樹脂の粘度を適切な範囲に設定する
と、離型剤の軟化点＞結着樹脂の融点の場合と比較して
離型剤の粘度が低くなり、結着樹脂に剪断をかけても離
型剤に分散がしにくくなってしまい、良好な分散状態を
得ることが困難となる。However, when the softening point of the release agent is smaller than the melting point of the binder resin, the viscosity of the binder resin is set in an appropriate range. In comparison, the viscosity of the release agent is low, and even if the binder resin is sheared, it becomes difficult to disperse the release agent, and it is difficult to obtain a good dispersion state.
【０００９】[0009]
【課題を解決するための手段】本発明は、上記課題を解
決するものであって、結着樹脂の融点より低い離型剤の
軟化点の原材料でも離型剤の良好な分散状態が容易に得
られるようにするものである。DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a good dispersion state of a release agent can be easily achieved even with a raw material having a softening point of the release agent lower than the melting point of the binder resin. To be obtained.
【００１０】そのために本発明は、複数の搬送部と混練
部に分割された２軸混練機により離型剤及び結着樹脂を
含む原材料を搬送、混練してトナーを製造するトナー製
造方法において、離型剤の軟化点が結着樹脂の融点より
低い原材料を用いると共に、前記２軸混練機における第
１混練部で粉砕・混練する工程の前に前記離型剤の軟化
点より高く前記結着樹脂の融点より低い設定温度により
離型剤を溶融させ結着樹脂を混合する工程を有すること
を特徴とし、前記２軸混練機の原材料を投入するフィー
ドから第１混練部までの搬送部を前記設定温度とするこ
とを特徴とするものである。[0010] For this purpose, the present invention relates to a toner production method for producing a toner by transporting and kneading raw materials including a release agent and a binder resin by a biaxial kneader divided into a plurality of transport sections and a kneading section. The raw material having a softening point of the release agent lower than the melting point of the binder resin is used, and the binder is higher than the softening point of the release agent before the step of pulverizing and kneading in the first kneading section in the biaxial kneader. A step of melting the release agent at a set temperature lower than the melting point of the resin and mixing the binder resin, wherein the conveying section from the feed for charging the raw materials of the biaxial kneader to the first kneading section is The temperature is set to a set temperature.
【００１１】[0011]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照しつつ説明する。図１は本発明に係るトナー製造
方法の実施の形態を説明するための図であり、１は２軸
混練機、２は第１搬送部、３は第１混練部、４は第２搬
送部、５は第２混練部、６は第３搬送部、７はフィード
口、８は押し出し口を示す。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view for explaining an embodiment of a toner production method according to the present invention, wherein 1 is a twin-screw kneader, 2 is a first conveying section, 3 is a first kneading section, and 4 is a second conveying section. Reference numeral 5 denotes a second kneading unit, 6 denotes a third transport unit, 7 denotes a feed port, and 8 denotes an extrusion port.
【００１２】図１において、２軸混練機１は、シリンダ
ーの中に２本のパドル（回転軸）が通り、Ｓ旋状スクリ
ューで構成し原材料を混合・搬送する第１搬送部２、搬
送されてきた原材料を粉砕・混練する第１混練部３、さ
らにその混練物を混合搬送、粉砕・混練する第２搬送部
４、第２混練部５、第３搬送部６からなる複数の搬送
部、混練部で構成されるものである。トナーは、この２
軸混練機１のフィード口７から結着樹脂、着色剤、電荷
制御剤、離型剤を含む原材料が第１搬送部２に投入さ
れ、混合・搬送、粉砕・混練を繰り返す混練工程を経て
製造され押し出し口８から取り出される。Referring to FIG. 1, a twin-screw kneader 1 has two paddles (rotating shafts) passing through a cylinder, is constituted by an S spiral screw, and has a first transfer section 2 for mixing and transferring raw materials. A first kneading unit 3 for pulverizing and kneading the raw materials, a plurality of conveying units including a second conveying unit 4 for mixing and conveying the kneaded material, a second kneading unit 5 and a third conveying unit 6 for pulverizing and kneading, It is composed of a kneading section. The toner is
Raw materials including a binder resin, a colorant, a charge control agent, and a release agent are charged into the first transport unit 2 from a feed port 7 of the shaft kneader 1 and manufactured through a kneading process in which mixing, transporting, pulverizing, and kneading are repeated. Then, it is taken out from the extrusion opening 8.
【００１３】本発明に係るトナー製造方法は、結着樹
脂、着色剤、電荷制御剤、離型剤を含む原材料におい
て、結着樹脂は全体の８０％、離型剤は５％程度の割合
であるが、混練による離型剤の分散前に、樹脂粒子に離
型剤をコーティングする処理をするため、結着樹脂は溶
けず離型剤のみ溶ける設定温度Ｔ1 で前混合を行うもの
である。そのため２軸混練機１においては、フィード口
７から第１混練部３までの第１搬送部２の設定温度Ｔ1
を離型剤の軟化点ＴW より高くし、かつ結着樹脂の融点
ＴR よりは低く、つまりＴW ＜Ｔ1 ＜ＴR とする。In the method for producing a toner according to the present invention, in a raw material containing a binder resin, a colorant, a charge control agent, and a release agent, the binder resin accounts for about 80% of the whole and the release agent accounts for about 5%. However, before dispersing the release agent by kneading, in order to coat the resin particles with the release agent, pre-mixing is performed at a set temperature T 1 at which the binder resin does not melt and only the release agent dissolves. . Therefore, in the twin-screw kneader 1, the set temperature T 1 of the first transport unit 2 from the feed port 7 to the first kneading unit 3 is set.
The higher the softening point T W of the release agent, and lower than the melting point T R of the binder resin, namely a T W <T 1 <T R .
【００１４】この設定温度Ｔ1 で離型剤が溶けて固体の
状態を維持する結着樹脂の廻りをコーティングすること
になり、実質的に離型剤の表面積が大きくなる。したが
って、離型剤が十分に伸び表面積が大きくなった状態
で、第１混練部において粉砕・混練されることにより、
離型剤の分散状態が良好なものとなる。つまり、結着樹
脂の廻りをコーティングして離型剤の表面積を大きくし
た状態の原材料を混練部に搬送して混練することによ
り、離型剤の分散が容易になる。At this set temperature T 1 , the release agent dissolves and coats around the binder resin which maintains a solid state, and the surface area of the release agent is substantially increased. Therefore, in a state where the release agent is sufficiently extended and the surface area is increased, the release agent is pulverized and kneaded in the first kneading section,
The dispersion state of the release agent becomes good. That is, the raw material in a state where the surface area of the release agent is increased by coating the periphery of the binder resin is conveyed to the kneading section and kneaded, whereby the release agent can be easily dispersed.
【００１５】設定温度が結着樹脂の融点より低いため、
十分に高い粘度での高シェア混練が可能になる。結着樹
脂は、粘度が低いと剪断力が弱く、逆に粘度が高いと機
械の負荷が大きくなるので、混練部においては、十分な
剪断力が得られるように、設定温度を調整して、結着樹
脂の粘度をコントロールする。また、混練部以降の搬送
部においては、設定温度が高いと分散した離型剤が再凝
集するため、再凝集しないように、設定温度を混練部よ
り低く設定する。また、押し出し後に離型剤が再凝集し
ないように、結着樹脂の融点付近まで混練部を冷却し
て、低温で押し出す。Since the set temperature is lower than the melting point of the binder resin,
High shear kneading with sufficiently high viscosity is possible. The binder resin, when the viscosity is low, the shearing force is weak, and when the viscosity is high, the load on the machine increases, so in the kneading section, the set temperature is adjusted so that a sufficient shearing force is obtained, Controls the viscosity of the binder resin. Also, in the transport section after the kneading section, if the set temperature is high, the dispersed release agent reaggregates, so the set temperature is set lower than the kneading section so as not to reaggregate. In order to prevent the release agent from reaggregating after the extrusion, the kneading portion is cooled to a temperature near the melting point of the binder resin and extruded at a low temperature.
【００１６】例えば設定温度が結着樹脂の融点より低い
が、さらに離型剤の軟化点よりも低い場合には、結着樹
脂だけでなく離型剤ともに固体であるため、上記効果は
得られない。逆に設定温度が離型剤の軟化点より高い
が、さらに結着樹脂の融点よりも高い場合にも、離型剤
とともに結着樹脂も溶融状態となるため、液状となった
離型剤は凝集した状態を作りやすく、上記のような効果
は得られない。For example, when the set temperature is lower than the melting point of the binder resin, but lower than the softening point of the release agent, not only the binder resin but also the release agent is solid, so that the above effects can be obtained. Absent. Conversely, if the set temperature is higher than the softening point of the release agent, but also higher than the melting point of the binder resin, the binder resin is in a molten state together with the release agent. It is easy to form an aggregated state, and the above effects cannot be obtained.
【００１７】原材料に含まれる結着樹脂は、熱あるいは
適当な圧力で流動性を持つこと、顔料、その他樹脂との
ブレンドが可能であること、なるべく透明であり、熱分
解温度が高いこと、それ自身で正又は負、それ以外の物
質で帯電が可能であること、微粒化が可能であること、
長期間にわたって劣化、変質が起こらず安定であること
などの特性が必要であり、ポリエステル、スチレンアク
リル、スチレン、エポキシなど定着、帯電、分散に対し
て良好な材料が用いられる。The binder resin contained in the raw materials must have fluidity under heat or an appropriate pressure, be capable of being blended with pigments and other resins, be as transparent as possible, and have a high thermal decomposition temperature. Positive or negative by itself, that it can be charged with other substances, that it can be atomized,
It is necessary to have characteristics such as stability without deterioration and deterioration over a long period of time, and a material such as polyester, styrene acryl, styrene and epoxy which is good for fixing, charging and dispersion is used.
【００１８】また、着色剤は、着色力があること、樹脂
中に分散が容易であること、帯電に悪影響を与えず、帯
電制御が可能であることなどの特性が必要であり、カー
ボンブラック、カラー顔料、磁性粉など光学特性、帯
電、電気抵抗に対して良好な材料が用いられる。Further, the colorant must have properties such as having coloring power, being easily dispersed in a resin, not having a bad influence on charging, and being capable of controlling charging. Good materials such as color pigments and magnetic powders with good optical characteristics, charging and electric resistance are used.
【００１９】電荷制御剤は、正又は負の荷電をトナーに
与えられること、発生した帯電を均一にかつ安定に保持
できること、逆帯電のないこと、樹脂に分散できるこ
と、衛生上有害でないことなどの特性が必要であり、Ｃ
ＣＡ、ＣＣＲ（アゾ系含金染料、リグロシン染料、４級
アンモニウム塩など帯電性に対して良好な材料が用いら
れる。The charge control agent is capable of imparting a positive or negative charge to the toner, being able to maintain the generated charge uniformly and stably, being free from reverse charge, being dispersible in resin, and being not harmful to hygiene. Characteristic required, C
Materials having good chargeability such as CA, CCR (azo metal-containing dyes, ligrosin dyes, and quaternary ammonium salts) are used.
【００２０】離型剤（ワックス）は、樹脂との相溶性が
よいこと、トナーのオフセット性を向上させること、耐
熱性を低下させないこと、帯電性に悪影響を与えないこ
と、ドラムなど他のシステムへの付着を起こさないこと
などの特性が必要であり、低分子量ポリプロピレン、低
分子量ポリエチレン、カルナバロウなど離型剤として定
着、耐熱性に対して良好な材料が用いられる。The release agent (wax) has good compatibility with the resin, improves the offset property of the toner, does not decrease the heat resistance, does not adversely affect the chargeability, and has other systems such as a drum. It is necessary to have properties such as not causing adhesion to the material, and a material having good fixing and heat resistance is used as a release agent such as low molecular weight polypropylene, low molecular weight polyethylene, and carnauba wax.
【００２１】外添剤２５は、トナーの流動性を向上させ
ること、摩擦帯電性を向上させること、クリーニング性
を向上させること、環境安定性がよいことなどの特性が
必要であり、疎水性シリカ、アルミナ、酸化チタン、有
機微粉末、二酸化珪素など流動性、帯電、転写、クリー
ニングに対して良好な材料が用いられる。The external additive 25 is required to have properties such as improving the fluidity of the toner, improving the triboelectric charging property, improving the cleaning property, and having good environmental stability. Good materials are used for fluidity, charging, transfer, and cleaning, such as alumina, titanium oxide, organic fine powder, and silicon dioxide.
【００２２】なお、本発明は、上記実施の形態に限定さ
れるものではなく、種々の変形が可能である。例えば上
記実施の形態では、原材料を投入するフィードから第１
混練部までの第１搬送部の設定温度を「離型剤の軟化点
＜設定温度＜結着樹脂の融点」とし、結着樹脂の周りに
離型剤がコーティングされる状態となるようにしたが、
投入する原材料の前処理として同様の処理を行って離型
剤がコーティングされる状態となるようにし、フィード
から第１混練部まで搬送するように構成してもよい。It should be noted that the present invention is not limited to the above embodiment, and various modifications are possible. For example, in the above-described embodiment, the first feed from the feed for charging the raw materials
The set temperature of the first transport unit up to the kneading unit is set to “softening point of release agent <set temperature <melting point of binder resin” so that the release agent is coated around the binder resin. But,
A similar process may be performed as a pretreatment of the raw material to be charged so that the release agent is coated, and the raw material may be transported from the feed to the first kneading unit.
【００２３】[0023]
【発明の効果】以上の説明から明らかなように、本発明
によれば、複数の搬送部と混練部に分割された２軸混練
機により離型剤及び結着樹脂を含む原材料を搬送、混練
してトナーを製造するトナー製造方法において、離型剤
の軟化点が結着樹脂の融点より低い原材料を用いると共
に、２軸混練機における第１混練部で粉砕・混練する工
程の前に離型剤の軟化点より高く結着樹脂の融点より低
い設定温度により離型剤を溶融させ結着樹脂を混合する
工程を有し、２軸混練機の原材料を投入するフィードか
ら第１混練部までの搬送部を離型剤の軟化点より高く結
着樹脂の融点より低い設定温度とするので、離型剤が溶
けて固体の状態を維持する結着樹脂の廻りをコーティン
グすることになり、実質的に離型剤の表面積が大きくな
る。したがって、離型剤が十分に伸び結着樹脂の廻りを
コーティングして表面積が大きくなった状態で、第１混
練部において粉砕・混練されることにより、離型剤の分
散状態が良好なものとすることができる。As is apparent from the above description, according to the present invention, a raw material containing a release agent and a binder resin is transported and kneaded by a biaxial kneader divided into a plurality of transport sections and a kneading section. In the toner production method for producing a toner by using a raw material, the softening point of the release agent is lower than the melting point of the binder resin, and the mold is released before the step of pulverizing and kneading in the first kneading section of the biaxial kneader. Having a step of melting the release agent at a set temperature higher than the softening point of the binder and lower than the melting point of the binder resin and mixing the binder resin, from the feed for charging the raw materials of the twin-screw kneader to the first kneading section. Since the conveying unit is set at a temperature higher than the softening point of the release agent and lower than the melting point of the binder resin, the release agent is melted and coated around the binder resin, which maintains a solid state, and is substantially coated. In addition, the surface area of the release agent increases. Therefore, the release agent is sufficiently stretched and coated around the binder resin, and is pulverized and kneaded in the first kneading section in a state where the surface area is increased, so that the dispersion state of the release agent is good. can do.
【図１】 本発明に係るトナー製造方法の実施の形態を
説明するための図である。FIG. 1 is a diagram for explaining an embodiment of a toner manufacturing method according to the present invention.
【図２】 粉砕トナーの製造工程を説明するための図で
ある。FIG. 2 is a diagram for explaining a manufacturing process of a pulverized toner.
【図３】 電子写真用トナーの基本構成を示す図であ
る。FIG. 3 is a diagram illustrating a basic configuration of an electrophotographic toner.
１…２軸混練機、２…第１搬送部、３…第１混練部、４
…第２搬送部、５…第２混練部、６…第３搬送部、７…
フィード口、８…ベント口、９…押し出し口DESCRIPTION OF SYMBOLS 1 ... Biaxial kneader, 2 ... 1st conveyance part, 3 ... 1st kneading part, 4
... 2nd conveying section, 5 ... 2nd kneading section, 6 ... 3rd conveying section, 7 ...
Feed port, 8 ... vent port, 9 ... extrusion port
Claims (2)
混練機により離型剤及び結着樹脂を含む原材料を搬送、
混練してトナーを製造するトナー製造方法において、離
型剤の軟化点が結着樹脂の融点より低い原材料を用いる
と共に、前記２軸混練機における第１混練部で粉砕・混
練する工程の前に前記離型剤の軟化点より高く前記結着
樹脂の融点より低い設定温度により離型剤を溶融させ結
着樹脂を混合する工程を有することを特徴とするトナー
製造方法。1. A raw material containing a release agent and a binder resin is transported by a biaxial kneader divided into a plurality of transport sections and a kneading section.
In a toner manufacturing method of manufacturing a toner by kneading, a raw material having a softening point of a release agent lower than the melting point of a binder resin is used, and before the step of pulverizing and kneading in a first kneading section in the biaxial kneader, A method for producing a toner, comprising a step of melting a release agent at a set temperature higher than a softening point of the release agent and lower than a melting point of the binder resin and mixing the binder resin.
ードから第１混練部までの搬送部を前記設定温度とする
ことを特徴とする請求項１記載のトナー製造方法。2. The toner manufacturing method according to claim 1, wherein a conveying section from a feed for charging the raw materials of the twin-screw kneader to a first kneading section is set to the set temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001136784A JP2002333735A (en) | 2001-05-08 | 2001-05-08 | Method for producing toner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001136784A JP2002333735A (en) | 2001-05-08 | 2001-05-08 | Method for producing toner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002333735A true JP2002333735A (en) | 2002-11-22 |
Family
ID=18983987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001136784A Pending JP2002333735A (en) | 2001-05-08 | 2001-05-08 | Method for producing toner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002333735A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009063927A (en) * | 2007-09-07 | 2009-03-26 | Ricoh Co Ltd | Method for manufacturing toner for nonmagnetic single component development, developer, oilless fixing method and image forming method |
-
2001
- 2001-05-08 JP JP2001136784A patent/JP2002333735A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009063927A (en) * | 2007-09-07 | 2009-03-26 | Ricoh Co Ltd | Method for manufacturing toner for nonmagnetic single component development, developer, oilless fixing method and image forming method |
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