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公开(公告)号：US11112708B2
公开(公告)日：2021-09-07
申请号：US16777087
申请日：2020-01-30
发明人： Kozue Uratani , Daisuke Yoshiba , Shohei Tsuda , Tomoya Nagaoka , Mariko Yamashita , Kazuki Kaneko , Ryo Nagata
摘要： A toner comprising a toner particle including a binder resin and a colorant and an external additive, wherein the external additive contains an external additive A having a Feret diameter of 60 to 200 nm, the external additive A is inorganic fine particles or organic-inorganic composite fine particles, adhesion index of the external additive A to the toner is 0.00 to 3.00, and penetration depth b and protrusion height c satisfy Relational expressions (1) and (2) below, where b (nm) denotes penetration depth of the external additive A, at a portion of the external additive A penetrating into the toner particle interior from the surface thereof, and c (nm) denotes a protrusion height of the external additive A at that portion, in an observation of an image resulting from image processing of a cross section of the toner using TEM; 60≤b+c≤200 (1), 0.15≤b/(b+c)≤0.30 (2).
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公开(公告)号：US20210200109A1
公开(公告)日：2021-07-01
申请号：US17130810
申请日：2020-12-22
摘要： An image forming apparatus comprising an electrophotographic photosensitive member and a developing device comprising a toner, the developing device being for supplying the toner to the electrophotographic photosensitive member, wherein the electrophotographic photosensitive member comprises a surface layer comprising a binder resin (A), the binder resin (A) comprises a specific structure, the toner comprises a toner particle, the toner particle comprises a binder resin (B) and a wax, and the wax has a value δp(w) of a polarity term based on Hansen solubility parameters of 1.8 (J/cm3)0.5 to 2.5 (J/cm3)0.5, as well as a process cartridge, a cartridge set and an image forming method.
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公开(公告)号：US20210165321A1
公开(公告)日：2021-06-03
申请号：US17103702
申请日：2020-11-24
摘要： An image forming apparatus including an electrophotographic photosensitive member having a support and a photosensitive layer, a charging unit that forms an electrostatic image on an outer surface of the electrophotographic photosensitive member, a developing unit that supplies a toner to the electrostatic image to form a toner image, and a transfer unit that transfers the toner image on a transfer medium. In this image forming apparatus, the surface layer of the electrophotographic photosensitive member contains a binder resin (A) having a specific structure and silica particles, and the wax contains a specific monoester compound.
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公开(公告)号：US10101683B2
公开(公告)日：2018-10-16
申请号：US14975495
申请日：2015-12-18
发明人： Koji Nishikawa , Shuhei Moribe , Daisuke Yoshiba , Shotaro Nomura , Kosuke Fukudome , Hiroki Akiyama , Yojiro Hotta , Katsuhisa Yamazaki
IPC分类号： G03G9/097
摘要： Provided is a toner, including: a toner particle; and an organic-inorganic composite fine particle on a surface of the toner particle, in which the organic-inorganic composite fine particle includes: a resin fine particle; and an inorganic fine particle embedded in the resin fine particle, and part of which is exposed to a surface of the composite fine particle, and in which the composite fine particle satisfies the following relationships: (i) in viscoelasticity measurement of the composite fine particle, when the loss elastic modulus thereof at a temperature T (° C.) is represented by G″T [dN/m2], a change ratio d(Log(G″T))/dT of a common logarithm of the loss elastic modulus has a minimum in a temperature range of from 60° C. to 150° C., and the minimum is less than −0.10; and (ii) the loss elastic modulus (G″180) thereof at a temperature of 180° C. is 1.0×104 dN/m2 or more and 1.0×107 dN/m2 or less.
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公开(公告)号：US10025212B2
公开(公告)日：2018-07-17
申请号：US15414342
申请日：2017-01-24
发明人： Koji Nishikawa , Shuhei Moribe , Daisuke Yoshiba , Kosuke Fukudome , Shotaro Nomura , Atsuhiko Ohmori , Katsuhisa Yamazaki
CPC分类号： G03G9/08755 , G03G9/0819 , G03G9/08764 , G03G9/08782 , G03G9/08795 , G03G9/08797 , G03G9/09716 , G03G9/09725
摘要： A toner includes toner particles and an external additive; the external additive includes an external additive A containing fine particles of a crystalline resin or fine particles of a wax; the crystalline resin and the wax each have an urethane bond or an urea bond; and the melting point of the crystalline resin and the melting point of the wax are each from 50° C. to 130° C.
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公开(公告)号：US20170199475A1
公开(公告)日：2017-07-13
申请号：US15393340
申请日：2016-12-29
发明人： Kosuke Fukudome , Shuhei Moribe , Koji Nishikawa , Daisuke Yoshiba , Shotaro Nomura , Atsuhiko Ohmori , Sho Kimura , Katsuhisa Yamazaki
CPC分类号： G03G9/0833 , G03G9/0819 , G03G9/0821 , G03G9/0827 , G03G9/0836 , G03G9/0837 , G03G9/0838 , G03G9/0839 , G03G9/08711 , G03G9/08755 , G03G9/08784 , G03G9/08795
摘要： Provided is a toner having a toner particle that contains a binder resin and a magnetic particle, wherein the magnetic particle satisfies the following stipulations (i) to (iii): (i) the magnetic particle has a prescribed shape and has a protruded portion on a plane portion thereof, (ii) the magnetic particle has a core particle that contains magnetite and has a coating layer, and (iii) the coating layer contains an iron-containing oxide and at least one of a silicon-containing oxide and an aluminum-containing oxide. In a molecular weight distribution measured on the tetrahydrofuran-soluble matter of the toner, the ratio (Mw/Mn) of a weight-average molecular weight to a number-average molecular weight is at least 10.0.
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公开(公告)号：US09250548B2
公开(公告)日：2016-02-02
申请号：US14339689
申请日：2014-07-24
发明人： Shotaro Nomura , Masami Fujimoto , Katsuhisa Yamazaki , Koji Nishikawa , Daisuke Yoshiba , Hiroki Akiyama
CPC分类号： G03G9/0838 , G03G9/0815 , G03G9/0819 , G03G9/0821 , G03G9/0827 , G03G9/0837 , G03G9/08782 , G03G9/09716 , G03G9/09725
摘要： The toner comprises: toner particles each containing a binder resin and a releasing agent; and an organic-inorganic composite fine particle, wherein: the organic-inorganic composite fine particle comprises: a vinyl resin particle containing a vinyl resin, the vinyl resin containing THF-insoluble matter in an amount of 95% by mass or more; and inorganic fine particles which are exposed at surfaces of the respective organic-inorganic composite fine particles, the organic-inorganic composite fine particle 1) has a plurality of convexes derived from the inorganic fine particles on the surfaces thereof, 2) has a number average particle size of 70-500 nm, and 3) has a shape factor SF-2 as measured at a magnification of 200,000 times of 103-120, and an absolute value of difference between an SP value of the releasing agent and an SP value of the vinyl resin is 0.50 (cal/cm3)1/2 or less.
摘要翻译： 调色剂包括：各自含有粘合剂树脂和脱模剂的调色剂颗粒; 有机 - 无机复合微粒，其中：所述有机 - 无机复合微粒包含：含有乙烯基树脂的乙烯基树脂粒子，所述乙烯基树脂含有95质量％以上的THF不溶物; 和有机 - 无机复合微粒1的表面露出的无机微粒）表面上具有多个由无机微粒衍生的凸部，2）具有数均分布 粒径为70〜500nm，3）具有在200〜300倍的倍数下测定的形状因子SF-2，剥离剂的SP值与SP值的差异的绝对值 乙烯基树脂为0.50（cal / cm 3）1/2以下。
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公开(公告)号：US09201323B2
公开(公告)日：2015-12-01
申请号：US14341084
申请日：2014-07-25
发明人： Koji Nishikawa , Katsuhisa Yamazaki , Daisuke Yoshiba , Shotaro Nomura , Hiroki Akiyama , Masami Fujimoto
CPC分类号： G03G9/0825 , G03G9/0819 , G03G9/08755 , G03G9/09708 , G03G9/09716 , G03G9/09725
摘要： A toner excellent in end-portion hot offset properties is provided. A toner including toner particles and an external additive, wherein the toner particles contain a binder resin, and organic-inorganic composite fine particles dispersed in the binder resin, and the organic-inorganic composite fine particles (1) have a number-average particle diameter of 70 nm or more and 500 nm or less, (2) have a structure in which inorganic fine particles are embedded in a resin particle, convexes derived from the inorganic fine particles being present on surfaces of the organic-inorganic composite fine particles, (3) have a shape factor SF-2 of 103 or more and 120 or less, and (4) contain a resin component in which a proportion of THF-insoluble matter based on a mass of the resin component is 95% by mass or more.
摘要翻译： 提供端部热偏移特性优异的调色剂。 包含调色剂颗粒和外部添加剂的调色剂，其中调色剂颗粒含有粘合剂树脂和分散在粘合剂树脂中的有机 - 无机复合微粒，有机 - 无机复合微粒（1）的数均粒径 70nm以上且500nm以下，（2）具有将无机微粒嵌入树脂粒子的结构，存在于有机 - 无机复合微粒表面的无机微粒的凸起（ 3）的形状因子SF-2为103以上且120以下，（4）含有以树脂成分为基准的THF不溶物的比例为95质量％以上的树脂成分 。
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公开(公告)号：US20230098426A1
公开(公告)日：2023-03-30
申请号：US17931706
申请日：2022-09-13
发明人： Takashi Matsui , Daisuke Yoshiba , Yuna Yamamoto
IPC分类号： G03G9/087 , G03G9/08 , G03G9/093 , G03G9/09 , C08F220/18 , C08F220/06 , C08F220/44 , C08F220/58 , C08F212/08
摘要： The toner is characterized in that, wherein the binder resin is a resin satisfying at least one of the following specification (A) or (B): (A) the binder resin contains a crystalline resin having a unit (a) represented by the following formula (1) and a resin having a sulfide structure; and (B) the binder resin contains a crystalline resin having the sulfide structure and having the unit (a) represented by the following formula (1): wherein the colorant is any colorant selected from the specific group consisting of: carbon black and so on, wherein when the toner is subjected to measurement with a differential scanning calorimeter, a peak temperature of a maximum endothermic peak is present in a range of from 50° C. or more to 70° C. or less, and wherein the maximum endothermic peak has an endothermic quantity of 30 J/g or more and 70 J/g or less.
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公开(公告)号：US20210200111A1
公开(公告)日：2021-07-01
申请号：US17129468
申请日：2020-12-21
摘要： An image forming apparatus comprising an electrophotographic photosensitive member and a developing device that has a toner and supplies the toner onto the electrophotographic photosensitive member, wherein the electrophotographic photosensitive member comprises a surface layer comprising a binder resin (A), the binder resin (A) comprises a specific structure, the toner comprises a toner particle, the toner particle comprises a binder resin (B) and a wax, and the wax comprises a prescribed diester compound; and a process cartridge and a cartridge set.
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