TONER AND METHOD FOR MANUFACTURING THE SAME, TONER STORAGE UNIT, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD

• Main Authors: TAKEBAYASHI TOMA, YAMADA HIROSHI, SAITO AKINORI, TAKEI AKIO, KAMATA YASUO
• Format: Patent
• Language: English; Japanese
• Published: 25.02.2022
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

To provide a toner that can achieve both low-temperature fixability and heat-resistant storage property at a high level and has satisfactory toner adhesion force, humidity-resistant thermal storage property, and cleaning property.SOLUTION: A toner has resin fine particles on a surface of a toner base particle containing at least a binder resin, a colorant, and wax. When a volume average primary particle diameter of the resin fine particles is M(nm) and a distance between the resin fine particles adjacent to each other and present on the surface of the toner base particle is L(nm), following (formula 1) to (formula 3) are satisfied. (Formula 1) M<L; (formula 2) 5(nm)<M≤60(nm); (formula 3)0.40≤[M(nm)/L(nm)]<0.90.SELECTED DRAWING: Figure 1 【課題】低温定着性と、耐熱保存性とを高レベルで両立でき、トナー付着力、耐湿熱保存性、クリーニング性が良好であるトナー。【解決手段】少なくとも結着樹脂、着色剤、及びワックスを含有するトナー母体粒子の表面に、樹脂微粒子を有するトナーであって、前記樹脂微粒子の体積平均一次粒子径をＭ（ｎｍ）、トナー母体粒子の表面に存在する隣り合う前記樹脂微粒子間の距離をＬ（ｎｍ）としたとき、次の（式１）～（式３）を満たす。（式１）Ｍ＜Ｌ（式２）５（ｎｍ）＜Ｍ≦６０（ｎｍ）（式３）０．４０≦［Ｍ（ｎｍ）／Ｌ（ｎｍ）］＜０．９０【選択図】図１