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公开(公告)号：US20150177632A1
公开(公告)日：2015-06-25
申请号：US14560686
申请日：2014-12-04
Applicant: Konica Minolta, Inc.
Inventor： Kazumi IMAE , Tatsuya FUJISAKI , Kouji SUGAMA , Kaori MATSUSHIMA , Junya ONISHI , Aya SHIRAI , Takaki KAWAMURA
CPC classification number: G03G9/09328 , G03G9/09364 , G03G9/09371 , G03G9/09392
Abstract: An electrostatic image developing toner includes a toner particle having a core-shell structure including a core portion containing a first polyester resin A, and a shell layer containing a second polyester resin B, the shell layer coating the core portion, wherein the second polyester resin B has at least a meta-phenylene skeleton, and the following relational expression (1) is satisfied: relational expression (1): 0≦a
Abstract translation: 静电图像显影调色剂包括具有包含第一聚酯树脂A的芯部的核 - 壳结构的调色剂颗粒和包含第二聚酯树脂B的壳层，其中涂覆芯部的壳层，其中第二聚酯树脂 B具有至少一个间 - 亚苯基骨架，并且满足以下关系式（1）：关系式（1）：0＆nlE; a
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公开(公告)号：US20190187577A1
公开(公告)日：2019-06-20
申请号：US16163090
申请日：2018-10-17
Applicant: Konica Minolta Inc.
Inventor： Tatsuya FUJISAKI , Ami MOTOHASHI , Takaki KAWAMURA
IPC: G03G9/087
CPC classification number: G03G9/08755 , G03G9/0819 , G03G9/0823 , G03G9/08782 , G03G9/08795 , G03G9/08797
Abstract: Provided is an image forming method using an electrostatic image developing toner containing: toner mother particles including a binder resin; and an external additive, wherein the binder resin contains a vinyl resin in an amount of 40 mass % or more with respect to the total amount of the binder resin, the image forming method including a step of: forming an image so that an image surface resistance value at 70° C. by a temperature change method of the formed image is set to be 5×1013 Ω or less.
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公开(公告)号：US20170205722A1
公开(公告)日：2017-07-20
申请号：US15278687
申请日：2016-09-28
Applicant: Konica Minolta, Inc.
Inventor： Shiro HIRANO , Noboru UEDA , Kouji SUGAMA , Junya ONISHI , Aya SHIRAI , Tatsuya FUJISAKI
CPC classification number: G03G9/08711 , G03G9/0825 , G03G9/08722 , G03G9/08733 , G03G9/08755 , G03G9/0902 , G03G9/0904 , G03G9/0926 , G03G9/09321 , G03G9/09342 , G03G9/09364 , G03G9/09392 , G03G9/09708 , G03G9/09725
Abstract: The present invention relates to a toner for electrostatic charge image development, including toner base particles containing a binder resin containing as a main component a vinyl resin having a constitutional unit derived from a monomer having an acid group, and aluminum, wherein a concentration of the aluminum in the toner base particles, as measured by radio inductively coupled plasma emission spectral analysis, is from 900 to 2,200 ppm. According to the present invention, there is provided a means for improving the environmental stability of electrification, and the glossiness and the image density of the image to be formed in a good balance while maintaining sufficient low temperature fixability in a toner for electrostatic charge image development.
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公开(公告)号：US20160282736A1
公开(公告)日：2016-09-29
申请号：US15060870
申请日：2016-03-04
Applicant: Konica Minolta, Inc.
Inventor： Junichi FURUKAWA , Shiro HIRANO , Junya ONISHI , Tatsuya FUJISAKI , Hidehito HARUKI
IPC: G03G9/087
CPC classification number: G03G9/08711 , G03G9/0821 , G03G9/08755
Abstract: A toner for developing electrostatic latent images contains a particulate toner which at least includes a colorant, a binder resin, a mold release agent, and a crystalline polyester resin. The binder resin contains a styrene-acrylic resin. The toner has a storage modulus G′, a difference (X) between the maximum value and the minimum value of the storage modulus G′, and a difference (Y) between the maximum value and the minimum value of a loss modulus G′ within the range of 140 to 180° C. satisfying relationships expressed by Conditional expressions (1) 1.0×102≦G′≦1.0×103, (2) 0≧X≧3.0×102, and (3) 0≦Y≦6.0×102.
Abstract translation: 用于显影静电潜像的调色剂含有至少包括着色剂，粘合剂树脂，脱模剂和结晶聚酯树脂的颗粒调色剂。 粘合剂树脂含有苯乙烯 - 丙烯酸树脂。 调色剂具有储能模量G'，储能模量G'的最大值和最小值之间的差（X）以及损耗模量G'的最大值和最小值之间的差（Y） 满足由条件式（1）表示的关系的范围为140〜180℃，1.0×102≤G'≤1.0×103，（2）0≥X≥3.0×102，（3）0≤Y≤6.0× 102。
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公开(公告)号：US20180217517A1
公开(公告)日：2018-08-02
申请号：US15875675
申请日：2018-01-19
Applicant: Konica Minolta, Inc.
Inventor： Tatsuya FUJISAKI , Junichi FURUKAWA
IPC: G03G9/087
CPC classification number: G03G9/08797 , G03G9/0821 , G03G9/0823 , G03G9/08711 , G03G9/08755
Abstract: A toner for electrostatic charge image development includes toner base particles including at least a binder resin, has a volume resistivity of 1.0×1014 Ω·cm or more at 25° C. with 50% RH by a temperature change method, and has a volume resistivity of 1.0×1015 Ω·cm or less at 67° C. by the temperature change method.
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Patent Agency Ranking
公开(公告)号：US20170277053A1
公开(公告)日：2017-09-28
申请号：US15267628
申请日：2016-09-16
Applicant: Konica Minolta, Inc.
Inventor： Junichi FURUKAWA , Tatsuya FUJISAKI , Naoki YOSHIE
CPC classification number: G03G9/08797 , G03G9/0821 , G03G9/08711 , G03G9/08755 , G03G9/08788 , G03G9/08793 , G03G9/08795 , G03G9/09328 , G03G9/09364 , G03G9/09371
Abstract: A toner for developing an electrostatic image includes a toner particle. The toner particle includes a binder resin and a black colorant. The binder resin includes a crystalline resin component. A toner layer formed through a deposition of the toner on a glass sheet in an amount of 6.5 g/m2 exhibits a light transmittance of 1 to 3% at a wavelength of 690 nm after applying heat at a temperature of 185° C. for five seconds to the toner layer from a position 100 μm away from a surface of the toner layer.
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公开(公告)号：US20230022529A1
公开(公告)日：2023-01-26
申请号：US17829965
申请日：2022-06-01
Applicant: Konica Minolta, Inc.
Inventor： Tatsuya FUJISAKI , Junya ONISHI , Kaori FUJINO , Kazumi OURA
Abstract: Provided is an electrostatic charge image developing toner including toner base particles containing a binder resin an a mold release agent, wherein a molecular weight corresponding to a main peak top of a molecular weight distribution curve of constituent components of the electrostatic charge image developing toner obtained by gel permeation chromatography is 15,000 or more; and in comparison of an area ratio of each peak in the molecular weight distribution curve, the binder resin contains an amorphous material of a low molecular weight component having a weight average molecular weight of 300 or more and less than 1000 in the area ratio of 10 to 20% with respect to the total amount of the binder resin.
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公开(公告)号：US20220326631A1
公开(公告)日：2022-10-13
申请号：US17656578
申请日：2022-03-25
Applicant: Konica Minolta, Inc.
Inventor： Junya ONISHI , Tatsuya FUJISAKI , Kazumi OURA , Kaori FUJINO
IPC: G03G9/087 , G03G9/097 , C08F212/08 , C08G63/16 , C08G63/183
Abstract: Provided is an electrostatic charge image developing toner containing at least toner particles, wherein the toner particles contain an amorphous vinyl resin, an amorphous polyester resin, a crystalline polyester resin, and an ester wax; the crystalline polyester resin is a crystalline polyester resin obtained by polycondensation of a dicarboxylic acid having a number of carbon atoms in the range of 9 to 14 and a dialcohol having a number of carbon atoms in the range of 9 to 14; the amorphous polyester resin is an amorphous polyester resin containing a constituent unit derived from a dicarboxylic acid having a number of carbon atoms in the range of 9 to 14 or a dialcohol having a number of carbon atoms in the range of 9 to 14; and a sum of the number of carbon atoms of the dicarboxylic acid and the dialcohol is in the range of 18 to 24.
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公开(公告)号：US20150064616A1
公开(公告)日：2015-03-05
申请号：US14476035
申请日：2014-09-03
Applicant: Konica Minolta, Inc.
Inventor： Kouji SEKIGUCHI , Tatsuya NAGASE , Shiro HIRANO , Junya ONISHI , Kenshi MIYAJIMA , Tatsuya FUJISAKI
IPC: G03G9/08
CPC classification number: G03G9/0825 , G03G9/08 , G03G9/0819 , G03G9/08704 , G03G9/08711 , G03G9/08755 , G03G9/08788 , G03G9/08795 , G03G9/08797
Abstract: An electrostatic latent image developing toner includes a toner base particle which contains at least a binder resin, and has a domain-matrix structure, in which a matrix contains a styrene-acrylic resin, a domain contains an amorphous resin which is formed by combining a vinyl-based polymerized segment and a polyester-based polymerized segment, and the domain containing the amorphous resin and having a diameter of 100 nm or larger has a number-average domain diameter which falls in the range from 150 to 1000 nm.
Abstract translation: 静电潜像显影调色剂包括至少含有粘合剂树脂的调色剂基体颗粒，并且具有其中基质含有苯乙烯 - 丙烯酸树脂的畴 - 基质结构，所述结构域含有通过将 乙烯基类聚合链段和聚酯类聚合链段，并且含有直径为100nm以上的非晶质树脂的结构域的平均畴直径为150〜1000nm的范围。
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公开(公告)号：US20170285502A1
公开(公告)日：2017-10-05
申请号：US15444465
申请日：2017-02-28
Applicant: Konica Minolta, Inc.
Inventor： Tatsuya FUJISAKI , Noboru UEDA
CPC classification number: G03G9/08711 , G03G9/0821 , G03G9/08755 , G03G9/0904 , G03G9/091 , G03G9/0918 , G03G9/092 , G03G15/08
Abstract: The present invention relates to a toner for electrostatic charge image development, including: a toner base particle having at least a binder resin, a releasing agent, and a colorant, wherein the following formula (1) is satisfied wherein a maximum value and a minimum value of a dielectric loss tangent tan δ, which are obtained by measuring at a frequency in the range of 1 kHz to 100 kHz under the condition at a temperature of 20° C. and a relative humidity of 50% RH, are defined as tan δmax and tan δmin, respectively. According to the present invention, a toner for electrostatic charge image development, with which the rising of the toner charge amount is improved while ensuring the low temperature fixability, and a high quality image having less density unevenness can be obtained even during the image forming at a high speed and a high printing rate, is provided. Frequency showing tan δmax
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