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公开(公告)号：US10539897B2
公开(公告)日：2020-01-21
申请号：US16163046
申请日：2018-10-17
Applicant: Konica Minolta Inc.
Inventor： Hitomi Motani , Tomoko Mine , Kaori Matsushima
Abstract: An image forming method uses a color toner including a yellow toner, a magenta toner, a cyan toner, and a black toner. The image forming method includes a toner image forming step of forming a toner image by developing the color toner on an electrostatic latent image formed by charging and exposing a surface of an electrostatic latent image bearing member, a transfer step of transferring the toner image onto a recording medium to form a color toner image, and a fixing step of fixing the color toner image on the recording medium. Each toner contain at least a binder resin, a coloring agent, a release agent, and a layered silicate compound. The volume average particle diameter of each toner is 4 to 6 μm. The content of the aluminum element in each toner represented by the Net intensity by WDXRF analysis has a specific relationship.
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公开(公告)号：US10591830B2
公开(公告)日：2020-03-17
申请号：US16128612
申请日：2018-09-12
Applicant: Konica Minolta, Inc.
Inventor： Kaori Matsushima , Tomoko Mine , Hitomi Motani
Abstract: In an image forming method, a black toner and a color toner other than the black toner are used. The black toner and the color toner each include a binder resin including a polyester resin as a main component and a vinyl resin, a releasing agent, and an external additive. A content Vk % by mass of the vinyl resin relative to total mass of the binder resin included in the black toner, a content Vc % by mass of the vinyl resin relative to total mass of the binder resin included in the color toner, a content Wk % by mass of the releasing agent relative to the total mass of the binder resin included in the black toner, and a content Wc % by mass of the releasing agent relative to the total mass of the binder resin included in the color toner satisfy a specific relationship.
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公开(公告)号：US09772571B2
公开(公告)日：2017-09-26
申请号：US15182825
申请日：2016-06-15
Applicant: Konica Minolta, Inc.
Inventor： Kaori Matsushima , Tomoko Mine , Tomomi Oshiba
CPC classification number: G03G9/08755 , G03G9/0804 , G03G9/0821 , G03G9/08711 , G03G9/08786 , G03G9/08795 , G03G9/08797
Abstract: An electrostatic image developing toner includes: a binder resin containing a crystalline polyester resin and an amorphous resin, wherein when, in differential scanning calorimetry of the toner according to ASTM D3418-8, a temperature of an endothermic peak derived from the crystalline polyester resin in a first heating process is defined as Tm1 (° C.), an endothermic quantity based on the endothermic peak in the first heating process is defined as ΔH1 (J/g), an endothermic quantity based on the endothermic peak in a second heating process is defined as ΔH2 (J/g), and a softening temperature is defined as Tf1/2 (° C.), Tm1 is 60 to 80° C., Tf1/2 is 95 to 125° C., and ΔH1 and ΔH2 satisfy the relationship represented by the following Formula (1) and (2): [Math. 1] 0.65≦ΔH2/ΔH1≦0.95 (1) 205−(1.4×Tm1)
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公开(公告)号：US09696645B2
公开(公告)日：2017-07-04
申请号：US15048160
申请日：2016-02-19
Applicant: Konica Minolta, Inc.
Inventor： Tomoko Mine , Kaori Matsushima
IPC: C08G63/02 , G03G9/087 , C08F257/02 , C08G64/00
CPC classification number: G03G9/08786 , C08F257/02 , G03G9/08797
Abstract: The present invention relates to a toner for electrostatic charge image development containing a binder resin, wherein the binder resin contains a hybrid crystalline polyester resin in which a crystalline polyester resin segment and a segment of an amorphous resin other than a polyester resin are chemically bonded, and an amorphous resin, the hybrid crystalline polyester resin and the amorphous resin having a specific phase-separated structure; and the hybrid crystalline polyester resin is a graft-copolymer having a specific structure, the toner having the specific thermal properties. According to the present invention, a means capable of providing an excellent low temperature fixability even to uneven media, and of improving both of image storability and heat-resistant can be provided.
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公开(公告)号：US09360783B2
公开(公告)日：2016-06-07
申请号：US14305538
申请日：2014-06-16
Applicant: Konica Minolta, Inc.
Inventor： Tomoko Mine , Anju Hori , Ken Ohmura , Mikio Kouyama
IPC: G03G9/087
CPC classification number: G03G9/08755 , G03G9/08782 , G03G9/08795 , G03G9/08797
Abstract: The toner includes: a second amorphous polyester resin including a structural unit represented by any of the following general formulas (1) to (3); and a first amorphous polyester resin including no structural units represented by the general formulas (1) to (3). R1, R2, R5, R9 and R10 are each independently an alkyl group having 4 to 15 carbon atoms or an alkenyl group having 4 to 15 carbon atoms, R3, R4, R7, R8 and R11 are each independently an alkylene group having 4 to 14 carbon atoms or an alkenylene group having 4 to 14 carbon atoms, R6 is a saturated or unsaturated divalent aliphatic hydrocarbon group having 4 to 15 carbon atoms, and R12 is a saturated or unsaturated trivalent aliphatic hydrocarbon group having 4 to 14 carbon atoms, and X is an aromatic ring, a carbocyclic ring or a group represented by the following formula (A).
Abstract translation: 该调色剂包括：包含由以下通式（1）至（3）中的任一个表示的结构单元的第二非晶聚酯树脂; 和不包含由通式（1）至（3）表示的结构单元的第一非晶聚酯树脂。 R 1，R 2，R 5，R 9和R 10各自独立地为具有4至15个碳原子的烷基或具有4至15个碳原子的烯基，R 3，R 4，R 7，R 8和R 11各自独立地为具有4至 14个碳原子或碳原子数为4〜14的亚烯基，R6为碳原子数为4〜15的饱和或不饱和二价脂族烃基，R12为碳原子数为4〜14的饱和或不饱和的三价脂肪族烃基， X是芳环，碳环或下式（A）表示的基团。
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Patent Agency Ranking
公开(公告)号：US09927729B2
公开(公告)日：2018-03-27
申请号：US15080040
申请日：2016-03-24
Applicant: Konica Minolta, Inc.
Inventor： Tomoko Mine , Kaori Matsushima
CPC classification number: G03G9/08711 , G03G9/0804 , G03G9/08755 , G03G9/08786 , G03G9/08791 , G03G9/08797
Abstract: A toner for developing an electrostatic latent image, the toner includes, a toner parent particle containing a binder resin, the binder resin including a crystalline resin and a hybrid resin, the hybrid resin having a main chain and a side chain, either one of or both of the main chain and the side chain including a unit derived from a crystal nucleating agent, and the crystal nucleating agent being one or more compounds selected from the group consisting of arachidyl alcohol, behenyl alcohol, 1-tetracosanol, 1-hexacosanol, octacosanol, palmitic acid, margaric acid, stearic acid, arachidic acid, behenic acid, and lignoceric acid.
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公开(公告)号：US09703222B2
公开(公告)日：2017-07-11
申请号：US15150523
申请日：2016-05-10
Applicant: Konica Minolta, Inc.
Inventor： Tomoko Mine , Kaori Matsushima
CPC classification number: G03G9/09733 , G03G9/0804 , G03G9/08755 , G03G9/08791
Abstract: An electrostatic latent image developing toner includes toner base particles including a binder resin and a nucleating agent, wherein the binder resin includes a hybrid crystalline resin having a structure in which a crystalline polyester resin unit and an amorphous resin unit are chemically bonded to each other, and the nucleating agent is at least one compound selected from the group consisting of arachidyl alcohol, behenyl alcohol, 1-tetracosanol, 1-hexacosanol, octacosanol, palmitic acid, margaric acid, stearic acid, arachidic acid, behenic acid, and lignoceric acid.
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公开(公告)号：US11106149B2
公开(公告)日：2021-08-31
申请号：US16779803
申请日：2020-02-03
Applicant: Konica Minolta, Inc.
Inventor： Tomoko Mine , Michiyo Fujita , Ryuichi Hiramoto , Kaori Matsushima
Abstract: Provided is an image forming method using an electrophotographic photoreceptor provided with a photosensitive layer and a protective layer in this order on a conductive support, and a toner, and the image forming method containing a charging step, an exposure step, a development step, a transfer step, a fixing step, and a cleaning step, wherein the protective layer contains at least a cured resin obtained by curing a polymerizable compound; the toner contains 50% by number or more of toner particles having a shape factor calculated by the equation (1) in the range of 1.2 to 1.6, and a variation coefficient of the shape factor is 16% or less; and the toner contains alumina particles having a number average particle diameter in the range of 5 to 60 nm and silica particles having a number average particle diameter in the range of 80 to 200 nm.
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公开(公告)号：US20200174387A1
公开(公告)日：2020-06-04
申请号：US16599737
申请日：2019-10-11
Applicant: Konica Minolta, Inc.
Inventor： Ryuichi Hiramoto , Michiyo Fujita , Tomoko Mine , Kaori Matsushima
Abstract: Provided is an image forming method including the step of: supplying powder particles to a resin image layer formed on a recording medium to adhere the powder particles to the resin image layer, wherein 80% or more of the powder particles out of the total number of the powder particles adhered to a surface and an inside of the resin image layer are adhered so that at least a part of each powder particle is exposed from the resin image layer.
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公开(公告)号：US20170010551A1
公开(公告)日：2017-01-12
申请号：US15182825
申请日：2016-06-15
Applicant: Konica Minolta, Inc.
Inventor： Kaori MATSUSHIMA , Tomoko Mine , Tomomi Oshiba
CPC classification number: G03G9/08755 , G03G9/0804 , G03G9/0821 , G03G9/08711 , G03G9/08786 , G03G9/08795 , G03G9/08797
Abstract: An electrostatic image developing toner includes: a binder resin containing a crystalline polyester resin and an amorphous resin, wherein when, in differential scanning calorimetry of the toner according to ASTM D3418-8, a temperature of an endothermic peak derived from the crystalline polyester resin in a first heating process is defined as Tm1 (° C.), an endothermic quantity based on the endothermic peak in the first heating process is defined as ΔH1 (J/g), an endothermic quantity based on the endothermic peak in a second heating process is defined as ΔH2 (J/g), and a softening temperature is defined as Tf1/2 (° C.), Tm1 is 60 to 80° C., Tf1/2 is 95 to 125° C., and ΔH1 and ΔH2 satisfy the relationship represented by the following Formulae (1) and (2): [Math. 1] 0.65≦ΔH2/ΔH1≦0.95 (1) 205−(1.4×Tm1)
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