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公开(公告)号：US20230273542A1
公开(公告)日：2023-08-31
申请号：US18175317
申请日：2023-02-27
发明人： DAI NOZAKI , MASATAKE TANAKA , TAIJI KATSURA , SHINTARO KAWAGUCHI
CPC分类号： G03G9/09725 , G03G9/0819 , G03G9/09775 , G03G15/08
摘要： A toner set capable of eliminating unclearness in a color boundary of an image in which a color image and a black image are printed side by side. The toner set includes at least: a black toner for forming a black image; and a color toner for forming a color toner image. The black toner is a toner comprising a black toner particle containing a black colorant formed of carbon black or iron oxide, a binder resin, and a releasing agent, and an external additive. The color toner is a toner comprising a color toner particle containing a color organic colorant, a binder resin, and a releasing agent. A ratio in surface roughness (Sa) between the toners is 1.30≤ surface roughness Sa(C) of color toner/surface roughness Sa(Bk) of black toner ≤4.00. The surface roughness Sa(C) of the color toner is 10 nm to 30 nm.
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公开(公告)号：US20230273543A1
公开(公告)日：2023-08-31
申请号：US18173512
申请日：2023-02-23
发明人： MASATAKE TANAKA , SHINTARO KAWAGUCHI , TAIJI KATSURA , DAI NOZAKI
IPC分类号： G03G9/107
CPC分类号： G03G9/1087 , G03G9/08755
摘要： A toner comprising: a toner particle comprising a binder resin; and an external additive at the surface of the toner particle, wherein, in a wettability test of the toner in a mixed methanol/water solvent, the methanol concentration at which the transmittance of light having a wavelength of 780 nm is 50% is 5 to 35 vol %, the external additive comprises a fluorine-containing particle, and the fluorine-containing particle is at least one selected from the group consisting of a fluorine-containing titania particle, a fluorine-containing silica particle, a fluorine-containing alumina particle, a fluorine-containing titanium composite oxide particle and a fluorine-containing hydrotalcite particle.
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公开(公告)号：US20230273539A1
公开(公告)日：2023-08-31
申请号：US18173501
申请日：2023-02-23
发明人： TAIJI KATSURA , MASATAKE TANAKA , DAI NOZAKI , SHINTARO KAWAGUCHI
IPC分类号： G03G9/093
CPC分类号： G03G9/09342 , G03G9/09364
摘要： A toner comprising a toner particle and an external additive, wherein the toner particle comprises a core comprising a resin A and a shell comprising a resin B on the surface of the core, the external additive comprises a hydrotalcite particle A, fluorine and aluminum are present in an inner part of the hydrotalcite particle A in line analysis in STEM-EDS mapping analysis of the toner, and a concentration ratio of the number of fluorine atoms relative to aluminum atoms (F/Al) in the hydrotalcite particle A, as determined by primary component mapping of the hydrotalcite particle A in the STEM-EDS mapping analysis of the toner, is 0.01 to 0.60.
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公开(公告)号：US20230273541A1
公开(公告)日：2023-08-31
申请号：US18173408
申请日：2023-02-23
发明人： MASATAKE TANAKA , TAIJI KATSURA , SHINTARO KAWAGUCHI , DAI NOZAKI
CPC分类号： G03G9/09725 , G03G9/0827 , G03G9/08711 , G03G9/0821 , G03G9/09733 , G03G9/09708
摘要： The present disclosure provides a toner excellent in low-temperature fixability and excellent in durability under harsh environments of high-temperature and high-humidity, and a method for producing the toner. The toner can contain: a toner particle containing a binder resin, wax, and an inorganic oxide particle; and an external additive, wherein the inorganic oxide particle contains, as a main component, an oxide of at least one element selected from the group consisting of Si, Mg, Al, Ti, and Sr; when a thin piece obtained by cutting the toner with a microtome is observed with a transmission electron microscope (TEM), the major axis A of the inorganic oxide particle is 0.10 to 3.00 μm; and in a wettability test of the toner with respect to a methanol/water mixed solvent, a methanol concentration at a transmittance of light having a wavelength of 780 nm of 50% is 5.0 to 30.0% by volume.
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公开(公告)号：US20230273536A1
公开(公告)日：2023-08-31
申请号：US18173357
申请日：2023-02-23
发明人： SHINTARO KAWAGUCHI , MASATAKE TANAKA , TAIJI KATSURA , DAI NOZAKI
CPC分类号： G03G9/0821 , G03G9/10882 , G03G9/0827
摘要： The subject toner includes a toner particle containing a binding resin and an inorganic oxide particle, wherein the inorganic oxide particle is a particle of an oxide containing at least one element selected from the group consisting of: Si; Mg; Al; Ti; and Sr, wherein, when an area of the inorganic oxide particle is represented by Sm and a sectional area of the toner is represented by St in a cross-section of the toner observed with a transmission electron microscope, Sm/St is 4.0% or more, wherein an area Sm of the inorganic oxide particle that occupies each of four regions obtained by dividing the cross-section of the toner by a long diameter of the toner and a perpendicular bisector of the long diameter has a standard deviation of 0.40 or more in the observed cross-section, and wherein the toner has an average circularity of 0.950 or more.
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