DEVELOPMENT DEVICE AND IMAGE FORMING APPARATUS

• Main Author: TAKINO YUJI
• Format: Patent
• Language: English; Japanese
• Published: 21.01.2016
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

PROBLEM TO BE SOLVED: To provide a development device and an image forming apparatus that are capable of creating a pressure-bonding postcard which keeps good fixability and a good storage property while being excellent in adhesiveness and being capable of preventing the generation of transition of characters when the postcard is peeled and opened.SOLUTION: Provided is a development device that performs development by a combination of an achromatic developer and a color developer that satisfies the relationship of 45°C≤Tg2t≤52°C, 106°C≤Tg2c, and 57°C≤Tg2c-Tg2t≤64°C, in which Tg1t is a glass transition temperature obtained by a midpoint method from a first peak of temperature rise according to the measurement by a differential scanning calorimeter of the achromatic developer containing no pigment, and Tg2t is a glass transition temperature obtained by a midpoint method from a second peak of temperature rise, and in which Tg1c is a glass transition temperature obtained by a midpoint method from a first peak of temperature rise according to the measurement by a differential scanning calorimeter of a color developer containing a pigment, and Tg2c is a glass transition temperature obtained by a midpoint method from a second peak of temperature rise. Also provided is an image forming apparatus comprising the development device. 【課題】良好な定着性と保存性を有しつつ、良好な接着性と剥離開封時における文字移りの発生を防止することができる圧着はがきを作成することが可能な現像装置および画像形成装置を提供する。【解決手段】顔料を含まない無色現像剤の示差走査熱量計における１回目の昇温ピークから中点法により求めたガラス転移温度をＴｇ１ｔ、２回目の昇温ピークから中点法により求めたガラス転移温度をＴｇ２ｔとし、顔料を含む有色現像剤の示差走査熱量計における１回目の昇温ピークから中点法により求めたガラス転移温度をＴｇ１ｃ、２回目の昇温ピークから中点法により求めたガラス転移温度をＴｇ２ｃとした場合に、４５℃≦Ｔｇ２ｔ≦５２℃、１０６℃≦Ｔｇ２ｃ、５７℃≦Ｔｇ２ｃ−Ｔｇ２ｔ≦６４℃、の関係を満たす前記無色現像剤と前記有色現像剤との組み合わせで現像を行うことを特徴とする現像装置及び当該現像装置を備えた画像形成装置。【選択図】 図１