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公开(公告)号：US10012921B2
公开(公告)日：2018-07-03
申请号：US15681742
申请日：2017-08-21
Applicant: CANON KABUSHIKI KAISHA
Inventor： Kentaro Kamae , Ryuichiro Matsuo , Yosuke Iwasaki , Wakiko Katsumata , Kenta Mitsuiki , Takeshi Ohtsu , Masaharu Miura , Koh Ishigami , Yuichi Mizo
CPC classification number: G03G9/08755 , G03G9/0821 , G03G9/0827 , G03G9/08711 , G03G9/08786 , G03G9/08795 , G03G9/08797 , G03G9/0904 , G03G9/0918 , G03G9/09733
Abstract: A toner having a toner particle containing an amorphous resin, a crystalline resin, a colorant, a release agent, and a polymer in which a styrene-acrylic polymer is graft-polymerized on a polyolefin, wherein the amorphous resin contains an amorphous polyester resin A, and the amorphous polyester resin A has a monomer unit derived from polyhydric alcohol and a monomer unit derived from polyhydric carboxylic acid, has, a particular amount of a succinic acid-derived monomer unit in the monomer unit derived from polyhydric carboxylic acid, and has, a particular amount of a monomer unit derived from a propylene oxide adduct on bisphenol A in the monomer unit derived from polyhydric alcohol; and has a particular softening point, a particular solubility parameter, and a particular peak molecular weight.
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公开(公告)号：US10007201B2
公开(公告)日：2018-06-26
申请号：US15435455
申请日：2017-02-17
Applicant: KYOCERA Document Solutions Inc.
Inventor： Yusuke Washino
CPC classification number: G03G9/09321 , G03G9/0918 , G03G9/09314 , G03G9/09335 , G03G9/0935 , G03G9/09371 , G03G9/09392
Abstract: An electrostatic latent image developing toner includes a plurality of toner particles each including a core and a shell layer covering a surface of the core. The shell layer includes a resin film and a plurality of resin particles. The shell layer contains a first resin forming the resin film, a second resin forming the resin particles, and an alkyl benzene sulfonic acid compound. The first resin is more hydrophobic than the second resin. The second resin is more positively chargeable than the first resin. The second resin has a repeating unit capable of forming a salt with the alkyl benzene sulfonic acid compound.
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公开(公告)号：US09971261B2
公开(公告)日：2018-05-15
申请号：US15423187
申请日：2017-02-02
Applicant: Satoshi Takahashi , Yoshihiro Moriya , Ryota Inoue , Masahiko Ishikawa , Tatsuki Yamaguchi , Satoshi Kojima
Inventor： Satoshi Takahashi , Yoshihiro Moriya , Ryota Inoue , Masahiko Ishikawa , Tatsuki Yamaguchi , Satoshi Kojima
CPC classification number: G03G9/0827 , G03G9/0804 , G03G9/0819 , G03G9/0821 , G03G9/08711 , G03G9/08755 , G03G9/0904 , G03G9/0918
Abstract: An electrostatic-image developing toner including at least a binder resin; a colorant; and a release agent, wherein an average circularity of particles having a particle diameter in a range of 0.79 times or more but less than 1.15 times as large as a most frequent diameter in a number particle size distribution of the toner is within a range of 1.010 times or more but less than 1.020 times as high as an average circularity of particles having a particle diameter of 1.15 times or more as large as the most frequent diameter.
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公开(公告)号：US09933717B2
公开(公告)日：2018-04-03
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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公开(公告)号：US09921501B2
公开(公告)日：2018-03-20
申请号：US15457159
申请日：2017-03-13
Applicant: CANON KABUSHIKI KAISHA
Inventor： Shinsuke Mochizuki , Kenichi Nakayama , Masashi Kawamura , Tsuneyoshi Tominaga , Kunihiko Nakamura , Tsutomu Shimano , Takayuki Toyoda , Shiro Kuroki
CPC classification number: G03G9/0806 , G03G9/0819 , G03G9/08711 , G03G9/08733 , G03G9/08755 , G03G9/08791 , G03G9/08795 , G03G9/08797 , G03G9/0918 , G03G9/09791
Abstract: A toner having a toner particle which contains a binder resin, a fatty acid metal salt, and a resin having an ionic functional group, in which the fatty acid metal salt is a fatty acid metal salt of a polyvalent metal with valency of 2 or higher and a fatty acid with carbon atom number of at least 8 and not more than 28, and the acid dissociation constant pKa of the resin having an ionic functional group is at least 6.0 and not more than 9.0.
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Patent Agency Ranking
76.发明申请公开(公告)号：US20180059564A1
公开(公告)日：2018-03-01
申请号：US15498042
申请日：2017-04-26
Applicant: FUJI XEROX CO., LTD.
Inventor： Satoshi MIURA , Yasuo KADOKURA , Akira MATSUMOTO , Shinya NAKASHIMA , Yukiaki NAKAMURA
CPC classification number: G03G9/08755 , G03G9/0804 , G03G9/0819 , G03G9/0821 , G03G9/0827 , G03G9/08764 , G03G9/08795 , G03G9/08797 , G03G9/0918 , G03G15/0865
Abstract: An electrostatic charge image developing toner includes toner particles including an amorphous resin and a crystalline resin, wherein, when the toner particles are subjected to a measurement by differential scanning calorimetry before and after being heated at a temperature of 50° C. and a humidity of 50% RH for a week, a relationship between an endothermic amount x (J/g) derived from the crystalline resin with respect to the toner particles before being heated and an endothermic amount y (J/g) derived from the crystalline resin with respect to the toner particles after being heated satisfies Expression (1): x/y
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77.发明申请公开(公告)号：US20180059561A1
公开(公告)日：2018-03-01
申请号：US15489204
申请日：2017-04-17
Applicant: FUJI XEROX CO., LTD.
Inventor： Shinya NAKASHIMA , Akira MATSUMOTO , Yasuo KADOKURA , Yukiaki NAKAMURA , Satoshi MIURA
CPC classification number: G03G9/08755 , G03G9/0804 , G03G9/0819 , G03G9/0821 , G03G9/08795 , G03G9/08797 , G03G9/0918 , G03G15/0822 , G03G15/0865
Abstract: An electrostatic charge image developing toner includes toner particles including an amorphous resin and a crystalline resin, wherein, when the toner particles are subjected to a measurement by differential scanning calorimetry (DSC) before and after being stored at a temperature of 50° C. and a humidity of 90% RH for 24 hours, a relationship between an onset temperature T1 (° C.) of an endothermic peak having the lowest peak temperature in a first heating step with respect to the toner particles before being stored and an onset temperature T2 (° C.) of an endothermic peak having the lowest peak temperature in a first heating step with respect to the toner particles after being stored satisfies Expression (1): 2
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公开(公告)号：US20180031990A1
公开(公告)日：2018-02-01
申请号：US15661344
申请日：2017-07-27
Applicant: CANON KABUSHIKI KAISHA
Inventor： Kentaro Kamae , Ryuichiro Matsuo , Yosuke Iwasaki , Wakiko Katsumata , Kenta Mitsuiki , Takeshi Ohtsu , Masaharu Miura , Koh Ishigami , Yuichi Mizo
CPC classification number: G03G9/08755 , G03G9/0808 , G03G9/0819 , G03G9/0821 , G03G9/0827 , G03G9/08795 , G03G9/08797 , G03G9/0918
Abstract: Provided is a toner including a toner particle containing an amorphous resin, a colorant, a release agent, and a crystalline resin, wherein, when η0.01 represents the extensional viscosity of the toner at a Hencky strain at 90° C. of 0.01 and η0.69 represents the extensional viscosity of the toner at a Hencky strain at 90° C. of 0.69, η0.01 and η0.69 satisfy the relationships of the following formulas (1) and (2): 3.0×104 Pa≦η0.01≦2.0×105 Pa formula (1) 2.0≦[η0.69/η0.01]. formula (2)
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公开(公告)号：US20180017884A1
公开(公告)日：2018-01-18
申请号：US15639648
申请日：2017-06-30
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tomoyasu ASAKAWA
CPC classification number: G03G9/08755 , G03G9/0819 , G03G9/0821 , G03G9/0825 , G03G9/08793 , G03G9/08795 , G03G9/08797 , G03G9/0918 , G03G9/09307 , G03G9/09321 , G03G9/09371 , G03G9/09392
Abstract: An electrostatic latent image developing toner includes a plurality of toner particles each including a core and a shell layer. The shell layer includes a first domain that is a non-crosslinked resin film and second domains that are crosslinked resin particles. The crosslinked resin has a higher glass transition point than the non-crosslinked resin. In a cross-sectional image of a toner particle, a proportion of a total length of a surface region of the core covered by the first domain is at least 45% and no greater than 80% relative to a circumferential length of the core. In a cross-sectional image of a toner particle, a proportion of second domains adhering to a surface of the first domain is at least 30% by number and no greater than 70% by number relative to all the second domains included in the toner particle.
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公开(公告)号：US09841695B2
公开(公告)日：2017-12-12
申请号：US15251381
申请日：2016-08-30
Applicant: FUJI XEROX CO., LTD.
Inventor： Satoshi Tatsuura , Keitaro Mori , Kazunari Komatsuzaki , Yutaka Nogami
CPC classification number: G03G9/1355 , G03G9/08755 , G03G9/08768 , G03G9/0918 , G03G9/125 , G03G13/10 , G03G15/10
Abstract: An image forming apparatus includes an image holding member, a first charging unit that charges a surface of the image holding member, a latent image forming unit that forms an electrostatic latent image on a charged surface of the image holding member, a second charging unit that charges a toner contained in a liquid developer, a developing unit that accommodates the liquid developer and develops the electrostatic latent image by using the liquid developer containing the toner charged by the second charging unit to form a toner image, a transfer unit that transfers the toner image to a recording medium, and a fixing unit that fixes the toner image to the recording medium. The liquid developer includes a toner in which a compound having a charge-accepting functional group has been bonded to a surface of toner particles, an ionization-controlling agent that ionizes the charge-accepting functional group, and a carrier liquid.
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