IMAGE FORMING METHOD, TONER, DEVELOPER, PRINTED MATERIAL, TONER STORAGE UNIT, AND IMAGE FORMING APPARATUS

• Main Authors: KUROSE KATSUNOBU, KANEKO KOTA, SUZUKI KAZUMI, SAWADA TOYOSHI
• Format: Patent
• Language: English; Japanese
• Published: 23.08.2022
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

To provide an image forming method with which an image having antibacterial properties and antiviral properties can be stably formed with the use of a toner that can be stably manufactured and has satisfactory electrostatic properties.SOLUTION: An image forming method has an electrostatic latent image forming step, a developing step, a transfer step, and a fixing step. A toner includes particles composed of a binder resin, a mold release agent, and an inorganic antibacterial/antiviral agent and satisfies all of the following conditions (1)-(3). When the number average particle diameter of the particles composed of the inorganic antibacterial/antiviral agent is X[μm] and the thickness of a layer of the toner fixed to a recording medium is Z[μm], 2.0X≤Z≤2.5X[μm] is satisfied. [Conditions] (1) The number average particle diameter X of the particles composed of the inorganic antibacterial/antiviral agent is 1.5≤X≤2.5[μm]. (2) When the weight average particle diameter of the toner is Y, 3X≤Y≤4X[μm]. (3) The content of the inorganic antibacterial/antiviral agent in the toner is 2.8 mass% or more and 5.0 mass% or less.SELECTED DRAWING: Figure 1 【課題】安定して製造でき、良好な帯電性を有するトナーを用い、抗菌性や抗ウィルス性を有する画像を安定して形成できる画像形成方法を提供する。【解決手段】静電潜像形成工程、現像工程、転写工程及び定着工程を有する画像形成方法であって、前記トナーは結着樹脂と、離型剤と、無機系抗菌抗ウィルス剤からなる粒子とを含み、以下の条件(1)～(3)をすべて満たし、前記無機系抗菌抗ウィルス剤からなる粒子の個数平均粒径をＸ[μｍ]とし、前記記録媒体に定着された前記トナーの層の厚みをＺ[μｍ]としたとき、２．０Ｘ≦Ｚ≦２．５Ｘ[μｍ]を満たす。［条件］(1)前記無機系抗菌抗ウィルス剤からなる粒子の個数平均粒径Ｘが１．５≦Ｘ≦２．５[μｍ](2)トナーの重量平均粒径をＹとしたとき、３Ｘ≦Ｙ≦４Ｘ[μｍ](3)トナー中の前記無機系抗菌抗ウィルス剤の含有量が２．８質量％以上５．０質量％以下【選択図】図１