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公开(公告)号：US12001158B2
公开(公告)日：2024-06-04
申请号：US17937710
申请日：2022-10-03
发明人： Naoko Kasai , Yohei Miyauchi , Masatsugu Toyonori , Yasuharu Notoya , Hiroki Muramatsu , Tomoyo Miyakai , Yoshiharu Seki
CPC分类号： G03G15/2057 , B32B1/08 , B32B27/304 , B32B33/00 , B32B37/04 , B32B2260/046 , B32B2307/51 , B32B2433/00 , G03G2215/2035
摘要： A fixing member having an endless belt shape or a roller shape includes a base layer and a surface layer. The surface layer contains a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, and has a pore communicating with an opening of an outer surface thereof. Perfluoropolyether is contained in at least a part of the pores. A ratio (E″(1)/E″(2)) is 0.60 to 1.00, where E″(1) is an average value of loss elastic moduli E″ of the surface layer in a direction orthogonal to a circumferential direction of the fixing member measured at a frequency of 10 Hz at 100 to 150° C., and E″(2) is an average value of loss elastic moduli E″ of the surface layer in a direction orthogonal to the circumferential direction of the fixing member measured at a frequency of 10 Hz at 100 to 150° C. after removal of the perfluoropolyether contained in the pore.
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公开(公告)号：US11988983B2
公开(公告)日：2024-05-21
申请号：US17937735
申请日：2022-10-03
发明人： Yohei Miyauchi , Masatsugu Toyonori , Naoko Kasai , Yasuharu Notoya , Hiroki Muramatsu , Tomoyo Miyakai
IPC分类号： G03G15/20
CPC分类号： G03G15/2057
摘要： A fixing member having a base layer and a surface layer, wherein the surface layer includes a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, and having at least one pore communicating with an opening on an outer surface thereof. A composition containing perfluoropolyether and a fluoropolymer is contained in at least a part of the at least one pore. The fluoropolymer has a particular repeating unit composed of perfluoropolyether, and at least one structure selected from the group consisting of a T unit of siloxane and a Q unit of siloxane.
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公开(公告)号：US20220373919A1
公开(公告)日：2022-11-24
申请号：US17661168
申请日：2022-04-28
发明人： Maki Imura , Tomoyo Miyakai , Kentaro Kamae , Yuu Nishimura , Shin Kitamura , Takaho Shibata
摘要： A toner, comprising a toner particle comprising a binder resin and a water-soluble polyvalent metal salt, wherein a main component of the binder resin is a polyester resin having specific acid value, the water-soluble polyvalent metal salt is a chloride, nitrate or sulfate of the specific metal, the water-soluble polyvalent metal salt has a solubility in water at 25° C. of 30 to 200 g/100 mL, in a cross-sectional observation of the toner particle, a proportion of the area of domains having a concrete surface area, relative to the total area of domains derived from the water-soluble polyvalent metal salt, is 80 to 100 area %, the expression below is satisfied, where At (area %) denotes the proportion of the total area of domains and Fm (atomic %) denotes the proportion of the polyvalent metal atom relative to the atoms in the toner as detected by X-ray fluorescence analysis. 0.02≤At/Fm≤0.10
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公开(公告)号：US20220373911A1
公开(公告)日：2022-11-24
申请号：US17661167
申请日：2022-04-28
发明人： Kentaro Kamae , Tomoyo Miyakai , Maki Imura , Yuu Nishimura , Shin Kitamura , Takaho Shibata
IPC分类号： G03G9/087
摘要： A toner, comprising a toner particle comprising a binder resin, wherein the binder resin comprises an amorphous polyester and a crystalline polyester; (i) a weight-average molecular weight of a soluble matter of the crystalline polyester in o-dichlorobenzene at 100° C. is 1500 to 4900; (ii) the crystalline polyester comprises a modified crystalline polyester having at least one terminal-modified structure selected from among a structure in which a hydroxy group at a main chain terminal of the crystalline polyester is terminal-modified with a C16 to C31 aliphatic monocarboxylic acid, and a structure in which a carboxy group at a main chain terminal of the crystalline polyester is terminal-modified with a C15 to C30 aliphatic monoalcohol; and (iii) a content ratio of the terminal-modified structure in the crystalline polyester is 80.0 mol % or higher.
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公开(公告)号：US20180107128A1
公开(公告)日：2018-04-19
申请号：US15730337
申请日：2017-10-11
发明人： Tomoyo Miyakai , Hayato Ida , Takaho Shibata , Junich Tamura , Ryuji Murayama , Daisuke Yamashita , Takashi Hirasa
IPC分类号： G03G9/087
CPC分类号： G03G9/08704 , G03G9/0804 , G03G9/08722 , G03G9/08724 , G03G9/08726 , G03G9/08728 , G03G9/08733 , G03G9/08795
摘要： A toner comprising a toner particle including a resin component, wherein the resin component includes an olefin resin and an olefin copolymer including a hydroxyl group, the olefin resin has a specific monomer unit Y1, the olefin copolymer including a hydroxyl group has a specific monomer unit Z1 and Z2, a hydroxyl value of the olefin resin is not more than 10 mg KOH/g, a hydroxyl value of the olefin copolymer including a hydroxyl group is at least 20 mg KOH/g and not more than 250 mg KOH/g, and a content of the olefin resin in the resin component is more than 50 mass % with respect to a total mass of the resin component.
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公开(公告)号：US11624987B2
公开(公告)日：2023-04-11
申请号：US17020253
申请日：2020-09-14
发明人： Yuzo Tokunaga , Takashi Hirasa , Yasutaka Akashi , Masato Nakajima , Naohiko Tsuchida , Akifumi Matsubara , Kohji Takenaka , Yuya Chimoto , Kouichirou Ochi , Tomoyo Miyakai
IPC分类号： G03G9/13
摘要： A liquid developer comprising: a toner particle containing binder resin; a carrier liquid; and a basic toner particle dispersing agent, wherein the basic toner particle dispersing agent is a primary amine, an acid value of the binder resin is at least 10 mg KOH/g, an acid value of a component having a molecular weight of not more than 2,000 contained in the binder resin is not more than 5 mg KOH/g, and a hydroxyl value of the component having a molecular weight of not more than 2,000 contained in the binder resin is not more than 10 mg KOH/g.
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公开(公告)号：US20200272068A1
公开(公告)日：2020-08-27
申请号：US16794925
申请日：2020-02-19
发明人： Kouichirou Ochi , Yuzo Tokunaga , Tomoyo Miyakai , Akifumi Matsubara , Takashi Hirasa , Hayato Ida , Yasutaka Akashi
摘要： A liquid developer containing a liquid carrier and a toner particle that is insoluble in the liquid carrier, wherein a particular substructure is bonded through a covalent bond to a surface of the toner particle, and a method of producing a liquid developer containing a liquid carrier and a toner particle that is insoluble in the liquid carrier, the method comprising a step (I) of covalently bonding, to a surface of the toner particle, a compound having a particular substructure.
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公开(公告)号：US10216106B2
公开(公告)日：2019-02-26
申请号：US15576240
申请日：2016-05-23
发明人： Tomoyo Miyakai , Junichi Tamura , Hayato Ida , Takaho Shibata , Kouichirou Ochi , Yuya Chimoto , Ryuji Murayama , Daisuke Yamashita , Akemi Watanabe , Takashi Hirasa
摘要： A method for producing a toner includes a step (1) of forming resin microparticles in an aqueous medium in the presence of a surfactant, a step (2) of aggregating the resin microparticles to form aggregated particles, and a step (3) of heating and the aggregated particles and allowing the aggregated particles to coalesce to form toner particles, in which a resin component in the resin microparticles contains an olefinic copolymer and resin A, the resin A has an acid value of 1 mgKOH/g or more and 50 mgKOH/g or less, the resin A has a SP value of 19.0 (J/cm3)0.5 or more and 21.0 (J/cm3)0.5 or less, and the resin component has an olefinic copolymer content of 50% by mass or more with respect to the total mass of the resin component.
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公开(公告)号：US20180143547A1
公开(公告)日：2018-05-24
申请号：US15576240
申请日：2016-05-23
发明人： Tomoyo Miyakai , Junichi Tamura , Hayato Ida , Takaho Shibata , Kouichirou Ochi , Yuya Chimoto , Ryuji Murayama , Daisuke Yamashita , Akemi Watanabe , Takashi Hirasa
CPC分类号： G03G9/0804 , G03G9/08704 , G03G9/08722 , G03G9/08755 , G03G9/08797
摘要： A method for producing a toner includes a step (1) of forming resin microparticles in an aqueous medium in the presence of a surfactant, a step (2) of aggregating the resin microparticles to form aggregated particles, and a step (3) of heating and the aggregated particles and allowing the aggregated particles to coalesce to form toner particles, in which a resin component in the resin microparticles contains an olefinic copolymer and resin A, the resin A has an acid value of 1 mgKOH/g or more and 50 mgKOH/g or less, the resin A has a SP value of 19.0 (J/cm3)0.5 or more and 21.0 (J/cm3)0.5 or less, and the resin component has an olefinic copolymer content of 50% by mass or more with respect to the total mass of the resin component.
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公开(公告)号：US20180067410A1
公开(公告)日：2018-03-08
申请号：US15687726
申请日：2017-08-28
发明人： Daisuke Yamashita , Takashi Hirasa , Hayato Ida , Junichi Tamura , Takaho Shibata , Ryuji Murayama , Kouichirou Ochi , Yuya Chimoto , Tomoyo Miyakai
CPC分类号： G03G9/08724 , G03G9/0804 , G03G9/0821 , G03G9/08722 , G03G9/08773 , G03G9/08795 , G03G9/08797
摘要： A toner including: a binder resin containing an ethylene-vinyl acetate copolymer; a polysiloxane derivative A represented by structural formula 1; and a polysiloxane derivative B represented by structural formula 2: (in structural formula 1, R1 to R10 each independently represent a methyl group or a phenyl group, and l, m and n each independently represent an integer of at least 1) (in structural formula 2, at least one of R11 to R20 is an organic group having a C4-30 alkyl group, a C4-30 alkoxy group, an acrylic group, an amino group, a methacrylic group or a carboxyl group, the remaining groups among R11 to R20 each independently represent a methyl group or a phenyl group, and p, q and r each independently represent an integer of at least 1).
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