公开(公告)号：US20140113224A1

公开(公告)日：2014-04-24

申请号：US14028597

申请日：2013-09-17

Applicant: Konica Minolta , Inc.

Inventor： Toshiyuki FUJITA ,  Mari KONISHI

IPC: G03G13/22

CPC classification number: G03G13/22 ,  G03G5/0614 ,  G03G5/14704 ,  G03G5/14795 ,  G03G9/09716 ,  G03G9/09725

Abstract: A method for forming an electrophotographic image is provided which exhibits high toner transfer efficiency without image defects caused by scratches on a photoreceptor and image blurring under high-humidity conditions. The method for forming an electrophotographic image uses an organic photoreceptor and includes a charging step, exposing step, developing step, transferring step and cleaning step. The organic photoreceptor has a photosensitive layer and a protective layer on an electrically conductive support. The protective layer contains a resin prepared by polymerization of a polymerizable compound, a particulate metal oxide, and a compound represented by a formula (1). The developing step uses a toner containing a silica particle having a number-average primary particle diameter of 70 to 150 nm. The formula (1) is: where R1, R2, R3, and R4 may be same or different and each represents a hydrogen atom or an alkyl group.

Abstract translation: 提供了形成电子照相图像的方法，其表现出高的调色剂转印效率，而没有由感光体上的划痕引起的图像缺陷和在高湿度条件下的图像模糊。 形成电子照相图像的方法使用有机感光体，包括充电步骤，曝光步骤，显影步骤，转印步骤和清洁步骤。 有机感光体在导电支持体上具有感光层和保护层。 保护层含有通过聚合可聚合化合物，颗粒金属氧化物和式（1）表示的化合物制备的树脂。 显影步骤使用含有数均一次粒径为70〜150nm的二氧化硅粒子的调色剂。 式（1）是：其中R 1，R 2，R 3和R 4可以相同或不同，各自表示氢原子或烷基。

公开(公告)号：US20130316277A1

公开(公告)日：2013-11-28

申请号：US13875504

申请日：2013-05-02

Applicant: KONICA MINOLTA, INC.

Inventor： Mari KONISHI ,  Keiichi INAGAKI ,  Toshiyuki FUJITA

IPC: G03G5/147

CPC classification number: G03G5/14734 ,  G03G5/0542 ,  G03G5/0546 ,  G03G5/0592 ,  G03G5/0614 ,  G03G5/09 ,  G03G5/14704 ,  G03G5/14708 ,  G03G5/1473 ,  G03G5/14791

Abstract: The invention provides a means for improving the abrasion resistance and the scratch resistance of a protection layer by increasing the surface hardness of the protection layer of an organic photoreceptor. The invention is an organic photoreceptor constituted by laminating on an electroconductive substrate, a photosensitive layer and a protection layer successively, wherein the protection layer comprises a charge transport substance represented by the following general formula (1), a resin component obtained by curing a curable compound and tin oxide treated with a surface preparation agent having a reactive organic group, and a silica particle; in the general formula (1), R1 and R2 are each independently hydrogen atoms or methyl groups, and R3 is a straight-chain or branched alkyl group having 1 to 5 carbon atoms.

Abstract translation: 本发明提供了通过提高有机感光体的保护层的表面硬度来提高保护层的耐磨性和耐划伤性的手段。 本发明是通过在导电性基材，感光层和保护层上依次层叠而形成的有机感光体，其中保护层包含由以下通式（1）表示的电荷输送物质，其通过将可固化 用具有反应性有机基团的表面处理剂处理的化合物和氧化锡和二氧化硅颗粒; 在通式（1）中，R 1和R 2各自独立地为氢原子或甲基，R 3为具有1〜5个碳原子的直链或支链烷基。

公开(公告)号：US20240004323A1

公开(公告)日：2024-01-04

申请号：US18337788

申请日：2023-06-20

Applicant: Konica Minolta, Inc.

Inventor： Toshiyuki FUJITA ,  Kazukuni Nishimura

IPC: G03G8/00 ,  G03G15/02 ,  G03G15/16 ,  G03G7/00

CPC classification number: G03G8/00 ,  G03G15/0216 ,  G03G15/162 ,  G03G7/0046 ,  G03G7/0013

Abstract: Provided is an electrophotographic photoreceptor capable of reducing the rotational torque of the photoreceptor and also reducing the increase in the rotational torque during long-term use when a cured layer obtained by curing a charge transporting compound having a radically polymerizable group is used as a protective layer. In the electrophotographic photoreceptor, a conductive support, a photosensitive layer, and a protective layer are laminated in this order. The protective layer is formed of a cured product of a composition containing the following: a charge transporting compound having a radically polymerizable functional group; and metal oxide particles surface-treated with a surface treating agent having a silicone chain in a side chain thereof.

公开(公告)号：US20180095404A1

公开(公告)日：2018-04-05

申请号：US15724806

申请日：2017-10-04

Applicant: Konica Minolta, Inc.

Inventor： Toshiyuki FUJITA ,  Mari UEDA ,  Haruo HORIGUCHI

IPC: G03G21/00 ,  G03G15/00 ,  G03G5/043 ,  G03G5/082 ,  G03G5/14

CPC classification number: G03G5/14704 ,  G03G5/14713 ,  G03G5/14717 ,  G03G5/14791 ,  G03G5/14795 ,  G03G7/0013 ,  G03G15/751

Abstract: An electrophotographic photoconductor (photoconductor) according to the embodiment includes a conductive support, a photosensitive layer, and a protective layer. The protective layer is composed of a cured product as one body obtained by a radical reaction of a composition containing a radical polymerizable monomer having a radical polymerizable functional group, a metal oxide fine particle having a radical polymerizable functional group, and camphorquinone or a derivative thereof. The photoconductor is installed in an image forming apparatus equipped with a cleaning device for removing transfer residual toner on the photoconductor, and the cleaning device includes an elastic cleaning member disposed so that it can come into contact with the surface of the photoconductor.

公开(公告)号：US20240160120A1

公开(公告)日：2024-05-16

申请号：US18475625

申请日：2023-09-27

Applicant: Konica Minolta, Inc.

Inventor： Takeshi ISHIDA ,  Akihiko ITAMI ,  Toshiyuki FUJITA ,  Kazukuni NISHIMURA

IPC: G03G5/147 ,  G03G5/047 ,  G03G5/06 ,  G03G21/16

CPC classification number: G03G5/14786 ,  G03G5/047 ,  G03G5/0696 ,  G03G5/14704 ,  G03G21/1661

Abstract: An electrophotographic photoreceptor includes a photosensitive layer on a support, wherein the photosensitive layer includes at least a charge generating layer, a charge transporting layer, and a protective layer, the charge generating layer contains titanyl phthalocyanine or a derivative thereof, the charge transporting layer contains a charge transporting material, the protective layer contains a reactant of a polymerizable monomer having a charge transporting structure and a polymerizable monomer having no charge transporting structure, and the charge transporting material, and a ratio of the mass of the charge transporting material contained in the protective layer is greater than 3% by mass and less than 9% by mass with respect to the total mass of a reactant of the polymerizable monomer having the charge transporting structure and the polymerizable monomer having no charge transporting structure, and the charge transporting material.

公开(公告)号：US20240345504A1

公开(公告)日：2024-10-17

申请号：US18610910

申请日：2024-03-20

Applicant: Konica Minolta, Inc.

Inventor： Kazutoshi KOBAYASHI ,  Yukio HOSOYA ,  Toshiyuki FUJITA ,  Akihiko ITAMI

IPC: G03G15/08

CPC classification number: G03G15/0808 ,  G03G2215/0861

Abstract: A developing sleeve for an electrophotographic image forming apparatus includes an aluminum alloy containing more than 0.6% by mass of silicon and conveys a developer containing a toner and a carrier.

公开(公告)号：US20230324818A1

公开(公告)日：2023-10-12

申请号：US18193727

申请日：2023-03-31

Applicant: Konica Minolta, Inc.

Inventor： Kazukuni NISHIMURA ,  Toshiyuki FUJITA ,  Hiroki TAKAO ,  Seijiro TAKAHASHI ,  Tomoko SAKIMURA

IPC: G03G5/147 ,  G03G15/00 ,  G03G5/047 ,  G03G5/05 ,  G03G5/06

CPC classification number: G03G5/14708 ,  G03G15/75 ,  G03G5/14704 ,  G03G5/047 ,  G03G5/0564 ,  G03G5/06142

Abstract: Provided is an electrophotographic photoreceptor having at least a charge transport layer and a protective layer sequentially laminated on a conductive support, wherein the protective layer contains a cured product of a composition containing a charge transport compound having a chain polymerizable functional group; the charge transport layer and the protective layer are continuously laminated with intervening a mixed layer therebetween in which components of both layers of the charge transport layer and the protective layer are compatible; and the mixed layer has a thickness in the range of 0.1 to 1.0 μm.

公开(公告)号：US20160223976A1

公开(公告)日：2016-08-04

申请号：US14996452

申请日：2016-01-15

Applicant: Konica Minolta, Inc.

Inventor： Masanori YUMITA ,  Toshiyuki FUJITA ,  Daisuke KODAMA

IPC: G03G15/00

CPC classification number: G03G15/751 ,  G03G5/082 ,  G03G5/142 ,  G03G5/144 ,  G03G5/14791 ,  G03G2215/00957

Abstract: An electrophotographic photoreceptor includes an intermediate layer, a photosensitive layer, and a surface protective layer, deposited in this order on an electroconductive support. The surface protective layer includes a resin and a p-type semiconductor microparticle contained in the resin. The intermediate layer includes a resin and at least one metal oxide microparticle contained in the resin. The at least one metal oxide microparticle is selected from the group consisting of untreated tin oxide particles, tin oxide particles surface-treated with organic compounds, untreated anatase titanium oxide particles, anatase titanium oxide particles surface-treated with organic compounds, untreated rutile titanium oxide particles, and rutile titanium oxide particles surface-treated with organic compounds.

Abstract translation: 电子照相感光体包括依次沉积在导电载体上的中间层，感光层和表面保护层。 表面保护层包括树脂中包含的树脂和p型半导体微粒。 中间层包括树脂和包含在树脂中的至少一种金属氧化物微粒。 所述至少一种金属氧化物微粒选自未处理的氧化锡颗粒，用有机化合物表面处理的氧化锡颗粒，未处理的锐钛矿氧化钛颗粒，用有机化合物表面处理的锐钛矿氧化钛颗粒，未处理的金红石氧化钛 颗粒和用有机化合物表面处理的金红石氧化钛颗粒。