TONER, DEVELOPER, DEVELOPER FOR REPLENISHMENT, TONER STORAGE UNIT, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD

• Main Authors: TAKEBAYASHI TOMA, NEMOTO TAICHI
• Format: Patent
• Language: English; Japanese
• Published: 01.08.2019
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

To provide a toner with which an image excellent in low glossiness is obtained and has excellent low-temperature fixability and heat-resistant storage property.SOLUTION: A toner contains at least a binder resin; a binarized image of the toner obtained by performing binarization processing on a phase image observed with a tapping mode AFM with the median value between the maximum value and the minimum value of the phase difference in the phase image has first phase difference images consisting of portions having a larger phase difference and second phase difference images consisting of portions having a smaller phase difference, has a configuration in which the first phase difference images are dispersed in the second phase difference images, wherein the dispersion diameter of the first phase difference images falls within a range of 150 nm to 500 nm; the glass transition temperature (Tg) of the toner has at least two glass transition points at 40°C or more and 65°C or less and -30°C or more and 20°C or less.SELECTED DRAWING: Figure 2 【課題】低光沢性に優れた画像が得られ、かつ優れた低温定着性および耐熱保存性を備えたトナーを提供する。【解決手段】少なくとも結着樹脂を含有し、トナーの、タッピングモードＡＦＭによって観察される位相像を、前記位相像における位相差の最大値と最小値との中間値で二値化処理して得られる二値化像が、位相差の大きい部位からなる第一の位相差像と、位相差の小さい部位からなる第二の位相差像とを有し、前記第一の位相差像が前記第二の位相差像中に分散された構造をとり、前記第一の位相差像の分散径が、１５０ｎｍ〜５００ｎｍの範囲であり、 トナーのガラス転移温度（Ｔｇ）が、４０℃以上６５℃以下と−３０℃以上２０℃以下に少なくとも２つのガラス転移点を有することを特徴とするトナー。【選択図】図２