TONER, DEVELOPER, AND IMAGE FORMING APPARATUS

• Main Authors: MIZOGUCHI YUKA, HISAKUNI DAICHI, MASUDA MINORU, INOUE RYUTA, HARASHIMA TOMOMI, YAMASHITA YUJI
• Format: Patent
• Language: English; Japanese
• Published: 11.03.2021
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

To provide a toner that is excellent in low-temperature fixability, high-temperature offset resistance property, heat-resistant storage property, glossiness of an image, and brightness of an image, and can prevent peeling of an image.SOLUTION: A toner contains polyester and a photoluminescent pigment. The toner has a glass transition temperature during the first heating (Tg1st) in DSC of 45°C to 65°C. The polyester includes a component insoluble in THF and a component soluble in THF. The component insoluble in THF includes a component A having a glass transition temperature during the second heating (Tg2nd) in DSC of -45°C to 5°C, and a component B having a glass transition temperature during the second heating (Tg2nd) in DSC of 45°C to 70°C. The component soluble in THF includes a component C having a glass transition temperature during the second heating (Tg2nd) in DSC of 40°C to 65°C.SELECTED DRAWING: None 【課題】低温定着性、耐高温オフセット性、耐熱保存性、画像の光沢及び画像の光輝性に優れ、画像の剥がれを抑制することが可能なトナーを提供する。【解決手段】トナーは、ポリエステルと、光輝性顔料を含む。トナーは、ＤＳＣの昇温１回目におけるガラス転移温度（Ｔｇ１ｓｔ）が４５℃〜６５℃である。ポリエステルは、ＴＨＦに不溶な成分と、ＴＨＦに可溶な成分を含む。ＴＨＦに不溶な成分は、ＤＳＣの昇温２回目におけるガラス転移温度（Ｔｇ２ｎｄ）が−４５℃〜５℃である成分Ａと、ＤＳＣの昇温２回目におけるガラス転移温度（Ｔｇ２ｎｄ）が４５℃〜７０℃である成分Ｂを含む。ＴＨＦに可溶な成分は、ＤＳＣの昇温２回目におけるガラス転移温度（Ｔｇ２ｎｄ）が４０℃〜６５℃である成分Ｃを含む。【選択図】なし