METHOD FOR MANUFACTURING TONER

• Main Authors: OTSU TAKESHI, IWASAKI YOSUKE, YAMASHITA DAISUKE, OKAMURA TATSUJI, TAMURA JUNICHI
• Format: Patent
• Language: English; Japanese
• Published: 08.06.2023
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PERFORMING OPERATIONS; PHOTOGRAPHY; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PHYSICS; THEIR RELEVANT APPARATUS; TRANSPORTING

To suppress coalescence occurring among powder particles and the adhesion and fusion of the powder particles into an apparatus when forming the powder particles into spheres by heating to improve the productivity of toner.SOLUTION: A method for manufacturing toner comprises a heating step using a heat treatment device. The heat treatment device includes: (1) a treatment chamber having a cylindrical inner peripheral surface and capable of performing heat treatment by hot wind; (2) a plurality of powder particle supply means for supplying the powder particles to the treatment chamber; and (3) hot wind supply means for supplying the hot wind for performing heat treatments to the treatment chamber. Humidity control means for controlling the humidity of gas supplied to the hot wind supply means is connected to the hot wind supply means; the hot wind has a temperature of 100.0°C or more and 200.0°C or less; and the humidity of the hot wind is controlled by the humidity control means so as to form a relative humidity of 3.0% or more and 80.0% or less when supplied to the treatment chamber.SELECTED DRAWING: Figure 1 【課題】 粉体粒子を熱処理によって球形化する際に、粉体粒子間で発生する合一や粉体粒子の装置内への付着、融着を抑制し、トナーの生産性を向上させること。【解決手段】 熱処理装置を用いて熱処理する工程を有するトナーの製造方法であって、該熱処理装置が、（１）熱風による熱処理が行われる円筒状の内周面を有する処理室、（２）該粉体粒子を該処理室に供給するための複数の粉体粒子供給手段、および（３）熱処理するための熱風を該処理室内に供給するための熱風供給手段、を有し、該熱風供給手段には、該熱風供給手段に供給される気体の湿度を調整する湿度調整手段が接続されており、該熱風は、温度１００．０℃以上２００．０℃以下であり、該熱風は、該処理室に供給される際の相対湿度が３．０％以上８０．０％以下となるように、該湿度調整手段によって湿度が調整されている、ことを特徴とするトナーの製造方法。【選択図】 図１