公开(公告)号：US20240361710A1

公开(公告)日：2024-10-31

申请号：US18644520

申请日：2024-04-24

Applicant: Konica Minolta, Inc.

Inventor： Yukiko NAKAI ,  Michiaki ISHIKAWA ,  Yusuke TAKIGAURA ,  Junya ONISHI ,  Keiji ARAI

IPC: G03G9/087 ,  G03G9/08 ,  G03G9/097 ,  G03G15/09

CPC classification number: G03G9/08755 ,  G03G9/0819 ,  G03G9/09725 ,  G03G15/0928 ,  G03G2215/0604

Abstract: An image forming system includes, an electrostatic charge image developing toner; and a developing sleeve configured to convey the electrostatic charge image developing toner, wherein a toner particle included in the electrostatic charge image developing toner contains an amorphous polyester, the amorphous polyester is a polycondensate of a polyvalent carboxylic acid and a polyhydric alcohol, a content percentage of a structural unit derived from a bisphenol A derivative in the amorphous polyester is 10 mol % or less with respect to all structural units derived from the polyhydric alcohol, and the developing sleeve includes an aluminum alloy including more than 0.6% by mass of silicon.

公开(公告)号：US20240319626A1

公开(公告)日：2024-09-26

申请号：US18457876

申请日：2023-08-29

Applicant: FUJIFILM BUSINESS INNOVATION CORP.

Inventor： Daisuke ISHIZUKA ,  Tsutomu FURUTA ,  Erina SAITO ,  Tomohito NAKAJIMA

IPC: G03G9/087

CPC classification number: G03G9/08797 ,  G03G9/08755 ,  G03G9/08795

Abstract: An electrostatic image developing toner includes a binder resin and crosslinked resin particles. In a cross section of the electrostatic image developing toner, the area fraction Sc of the crosslinked resin particles is 5% or more and 40% or less, the proportion Se of voids in the cross section is 1% or more and 10% or less, and the ratio Se/Sc of the proportion Se of voids to the area fraction Sc is 0.05 or more and 1.5 or less.

公开(公告)号：US20240219855A1

公开(公告)日：2024-07-04

申请号：US18493077

申请日：2023-10-24

Applicant: Konica Minolta, Inc.

Inventor： Kazuya ISOBE

IPC: G03G9/087 ,  G03G9/08

CPC classification number: G03G9/08755 ,  G03G9/0806

Abstract: A toner for electrostatic charge image development includes toner particles. The toner particles contain a polymer having a structural unit represented by the general expression (1):




and a release agent. In the general expression (1), R1 represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms. R2 and R3 each independently represents a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, or an alkoxy group.

公开(公告)号：US20240219853A1

公开(公告)日：2024-07-04

申请号：US18391396

申请日：2023-12-20

Applicant: CANON KABUSHIKI KAISHA

Inventor： YU YOSHIDA ,  NAOYA ISONO ,  SHOTARO NOMURA

IPC: G03G9/087 ,  G03G9/097

CPC classification number: G03G9/08711 ,  G03G9/08755 ,  G03G9/09733

Abstract: A toner includes toner particles containing a crystalline organic material that contains a crystalline vinyl resin as an essential component and a crystalline polyester and a wax component as optional components. A total of the crystalline vinyl resin, crystalline polyester, and wax component with respect to the toner particles is 10.0 to 90.0 mass %. The crystalline vinyl resin contains a crystalline resin A having (i) units A and (ii) units B. The toner particles contain 0.0020 to 0.0500 mass % of a metal that can form a complex with an acetylacetonate moiety in a unit B of the crystalline resin A with respect to a mass of the toner particles. The acetylacetonate moiety of at least one of the units B in the crystalline resin A forms a complex with the metal. In the crystalline resin A, a content of the unit B is 0.50 to 10.0 mass %.

公开(公告)号：US11934146B2

公开(公告)日：2024-03-19

申请号：US17398875

申请日：2021-08-10

Applicant: CANON KABUSHIKI KAISHA

Inventor： Atsuhiko Ohmori ,  Takaaki Furui ,  Yasuhiro Hashimoto

IPC: G03G9/087 ,  G03G9/08 ,  G03G9/097

CPC classification number: G03G9/08711 ,  G03G9/0804 ,  G03G9/0819 ,  G03G9/08755 ,  G03G9/08782 ,  G03G9/09708

Abstract: A toner comprises a toner particle containing a resin component and a wax; and an inorganic fine particle on a surface of the toner particle, wherein in the cross section of the toner particle, domains including the wax are present in a region ranging from a surface of the toner particle to a depth of 600 nm from the surface, wherein when a percentage ratio of sum of areas of all the domains in the region with respect to an area of the region is R2, and when a percentage ratio of sum of areas of the domains having a major diameter of 10 to 120 nm in the region with respect to the area of the region is R1, R1 and R2 satisfy the following formulae (1) and (2):

2.0≤R1(%)≤15.0  formula(1)

R1(%)/R2(%)≥0.60  formula (2).

公开(公告)号：US11899397B2

公开(公告)日：2024-02-13

申请号：US17224417

申请日：2021-04-07

Applicant: SHARP KABUSHIKI KAISHA

Inventor： Osamu Wada ,  Yoritaka Tsubaki

IPC: G03G9/087 ,  G03G9/097 ,  G03G9/113 ,  G03G9/08

CPC classification number: G03G9/09733 ,  G03G9/0819 ,  G03G9/0821 ,  G03G9/08755 ,  G03G9/1138

Abstract: The peak top molecular weight of the tetrahydrofuran-soluble component of the toner, as measured by gel permeation chromatography, is 4,000 or more and 6,500 or less. The tetrahydrofuran-insoluble component of the toner is 10% by weight or more and 30% by weight or less. When the endothermic peak temperature T1 in the heating process and the exothermic peak temperature T2 during the cooling process originating from the ester wax is measured using a differential scanning calorimeter, the value T1-T2 is 15° C. or more and 30° C. or less.

公开(公告)号：US11853005B2

公开(公告)日：2023-12-26

申请号：US17002652

申请日：2020-08-25

Applicant: TOSHIBA TEC KABUSHIKI KAISHA

Inventor： Yosuke Imamura

IPC: G03G9/087 ,  C08K3/36 ,  C08K3/22 ,  G03G9/113 ,  G03G9/08 ,  B82Y30/00

CPC classification number: G03G9/08755 ,  C08K3/22 ,  C08K3/36 ,  G03G9/0819 ,  G03G9/1139 ,  B82Y30/00 ,  C08K2003/2237 ,  C08K2201/005

Abstract: A toner includes toner base particles and an external additive. The external additive is adhered to surfaces of the toner base particles, which contain a crystalline polyester resin and an ester wax. The proportion of an ester compound with a carbon number of C1, the content of the ester compound with a carbon number of C1 being highest among the ester compounds constituting the ester wax, is 65 mass % or more with respect to 100 mass % of the ester wax. The carbon number distribution of the ester compounds constituting the ester wax has only one maximum peak in a region where the carbon number is 43 or more. The external additive contains silica particles having a volume average primary particle diameter D50 of 40 to 75 nm. The moisture content of the silica particles is less than 1.0 mass % with respect to 100 mass % of the silica particles.

公开(公告)号：US11829103B2

公开(公告)日：2023-11-28

申请号：US17148881

申请日：2021-01-14

Applicant: FUJIFILM Business Innovation Corp.

Inventor： Daisuke Noguchi ,  Atsushi Sugawara ,  Yoshimasa Fujihara ,  Shintaro Anno ,  Satoshi Miura

IPC: G03G9/087 ,  G03G9/08 ,  G03G9/097 ,  C08G63/52 ,  C08G63/06 ,  C08F212/08

CPC classification number: G03G9/08755 ,  C08F212/08 ,  C08G63/06 ,  C08G63/52 ,  G03G9/0819 ,  G03G9/0821 ,  G03G9/0825 ,  G03G9/08711 ,  G03G9/09733 ,  G03G2215/0614

Abstract: An electrostatic image developing toner includes an amorphous polyester resin and a crystalline polyester resin, wherein a Net intensity NNa of a Na element and a Net intensity NCl of a Cl element, the Net intensities NNa and NCl being determined by X-ray fluorescence analysis, satisfy 2.5≤NCl/NNa≤260.0.

公开(公告)号：US11815851B2

公开(公告)日：2023-11-14

申请号：US17213295

申请日：2021-03-26

Applicant: Xerox Corporation

Inventor： Richard Philip Nelson Veregin ,  Kimberly D. Nosella ,  Raysa Rodriguez Diaz ,  Cuong Vong ,  Sandra J. Gardner ,  Majid Kamel

IPC: G03G9/087 ,  G03G9/093 ,  G03G9/08 ,  C08F220/22 ,  C08F220/18 ,  C08F220/34 ,  C08F212/36 ,  C08K3/22 ,  G03G9/097

CPC classification number: G03G9/08728 ,  C08F212/36 ,  C08F220/1806 ,  C08F220/22 ,  C08F220/34 ,  C08K3/22 ,  G03G9/0806 ,  G03G9/0819 ,  G03G9/08755 ,  G03G9/08793 ,  G03G9/09321 ,  G03G9/09725 ,  C08K2003/2227 ,  C08K2003/2241

Abstract: Disclosed herein is a toner composition, developer and additive for a toner composition. The toner composition includes toner particles having at least one resin, an optional colorant, an optional wax, and a crosslinked polymer particle on at least a portion of an external surface of the toner particles. The crosslinked polymeric particle on a surface of the toner particles includes at least a hydrophobic monomer comprising a non-fluorinated monomer having a carbon to oxygen (C/O) ratio of 3 or greater or a fluorinated monomer. The crosslinked polymer particle includes a second monomer comprising two or more vinyl groups present in an amount from about 8 wt % to about 40 wt % of the copolymer, a metal oxide and optionally a charge control agent monomer.

公开(公告)号：US20230350318A1

公开(公告)日：2023-11-02

申请号：US18299138

申请日：2023-04-12

Applicant: Konica Minolta, Inc.

Inventor： Keiji ARAI ,  Kentarou MOGI ,  Atsushi IIOKA ,  Minori MOMMA

IPC: G03G9/087 ,  G03G9/097 ,  G03G5/02 ,  G03G9/08

CPC classification number: G03G9/0825 ,  G03G5/0217 ,  G03G9/0827 ,  G03G9/08755 ,  G03G9/0975

Abstract: An image forming system uses: an organic photoreceptor; and a toner for electrostatic charge image development containing toner particles, wherein the organic photoreceptor has a protective layer containing a cured resin; the toner particle has a form in which at least one type of lubricant particle and at least one type of non-lubricant particle are contained or adhered on a surface of a plurality of convex portions or on a surface between the plurality of convex portions, of a toner base particle having the plurality of convex portions thereon; and an average spacing D1 of the convex portions on the surface of the toner base particle, a median diameter D2 of the lubricant particle having the smallest median diameter, and a median diameter D3 of the non-lubricant particle having the largest median diameter, satisfy the relationship of the following formula (1): Formula (1) D3≤D1≤D2.