公开(公告)号：US20240134297A1

公开(公告)日：2024-04-25

申请号：US18489812

申请日：2023-10-17

Applicant: KYOCERA Document Solutions Inc.

Inventor： Toru TAKATSUNA

IPC: G03G9/083 ,  G03G9/097 ,  G03G15/08

CPC classification number: G03G9/0839 ,  G03G9/0836 ,  G03G9/0838 ,  G03G9/09708 ,  G03G15/0822

Abstract: An image forming apparatus includes a magnetic toner, an image bearing member, and a development device. The image bearing member is an amorphous silicon photosensitive drum. The magnetic toner includes toner particles. The toner particles each include a toner mother particle containing a binder resin and a magnetic powder and alumina particles attached to a surface of the toner mother particle. The alumina particles each include a core containing alumina and a conductive layer covering the core. The conductive layer contains antimony tin oxide. The alumina particles have a number average primary particle diameter of at least 0.15 μm and no greater than 0.50 μm. The alumina particles have a specific resistance of no greater than 250 Ω·cm. The alumina particles have an X-ray intensity ratio of at least 0.25 and no greater than 0.35.

公开(公告)号：US09971263B2

公开(公告)日：2018-05-15

申请号：US15393340

申请日：2016-12-29

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kosuke Fukudome ,  Shuhei Moribe ,  Koji Nishikawa ,  Daisuke Yoshiba ,  Shotaro Nomura ,  Atsuhiko Ohmori ,  Sho Kimura ,  Katsuhisa Yamazaki

IPC: G03G9/083 ,  G03G9/087 ,  G03G9/08

CPC classification number: G03G9/0833 ,  G03G9/0819 ,  G03G9/0821 ,  G03G9/0827 ,  G03G9/0836 ,  G03G9/0837 ,  G03G9/0838 ,  G03G9/0839 ,  G03G9/08711 ,  G03G9/08755 ,  G03G9/08784 ,  G03G9/08795

Abstract: Provided is a toner having a toner particle that contains a binder resin and a magnetic particle, wherein the magnetic particle satisfies the following stipulations (i) to (iii): (i) the magnetic particle has a prescribed shape and has a protruded portion on a plane portion thereof, (ii) the magnetic particle has a core particle that contains magnetite and has a coating layer, and (iii) the coating layer contains an iron-containing oxide and at least one of a silicon-containing oxide and an aluminum-containing oxide. In a molecular weight distribution measured on the tetrahydrofuran-soluble matter of the toner, the ratio (Mw/Mn) of a weight-average molecular weight to a number-average molecular weight is at least 10.0.

公开(公告)号：US09454096B2

公开(公告)日：2016-09-27

申请号：US14364067

申请日：2012-12-26

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yusuke Hasegawa ,  Tadashi Dojo ,  Michihisa Magome

IPC: G03G9/083 ,  G03G9/08 ,  G03G9/087 ,  G03G9/097

CPC classification number: G03G9/0834 ,  G03G9/081 ,  G03G9/0819 ,  G03G9/0825 ,  G03G9/0827 ,  G03G9/083 ,  G03G9/0833 ,  G03G9/0835 ,  G03G9/0836 ,  G03G9/08755 ,  G03G9/08795 ,  G03G9/09708 ,  G03G9/09725

Abstract: A magnetic toner contains magnetic toner particles containing a binder resin and a magnetic body, and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles contain metal oxide fine particles, the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles, when a coverage ratio A (%) is a coverage ratio of the magnetic toner particles' surface by the inorganic fine particles and a coverage ratio B (%) is a coverage ratio of the magnetic toner particles' surface by the inorganic fine particles that are fixed to the magnetic toner particles' surface, the magnetic toner has a coverage ratio A and a coverage ratio B/coverage ratio A in prescribed ranges, wherein the magnetic toner has a dielectric constant ∈′ and a dielectric loss tangent in prescribed ranges.

Abstract translation: 磁性调色剂含有含有粘合剂树脂和磁性体的磁性调色剂颗粒和磁性调色剂颗粒表面上存在的无机细颗粒，其中磁性调色剂颗粒表面上存在的无机细颗粒含有金属氧化物微粒， 含有二氧化硅微粒的金属氧化物微粒，任选地含有二氧化钛微粒和氧化铝微粒，二氧化硅微粒的含量相对于二氧化硅微粒的总质量为85质量％以上，二氧化钛微细 颗粒和氧化铝细颗粒，当覆盖率A（％）是无机细颗粒的磁性调色剂颗粒的表面的覆盖率和覆盖率B（％）时，磁性调色剂颗粒表面的覆盖率 通过固定在磁性调色剂颗粒表面的无机细颗粒，磁性调色剂具有覆盖率A和覆盖率 B /覆盖率A在规定范围内，其中磁性调色剂具有介电常数ε'和在规定范围内的介电损耗角正切。

公开(公告)号：US09423711B2

公开(公告)日：2016-08-23

申请号：US14364634

申请日：2013-01-31

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kozue Uratani ,  Michihisa Magome ,  Yusuke Hasegawa ,  Shuichi Hiroko

IPC: G03G9/083 ,  G03G9/08 ,  G03G9/087 ,  G03G9/097

CPC classification number: G03G9/0839 ,  G03G9/081 ,  G03G9/0833 ,  G03G9/0836 ,  G03G9/08706 ,  G03G9/08782 ,  G03G9/08795 ,  G03G9/08797 ,  G03G9/09708 ,  G03G9/09725

Abstract: A magnetic toner including: magnetic toner particles containing a binder resin, a magnetic body, and a release agent; and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles contain metal oxide fine particles, the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles, wherein the magnetic toner has a coverage ratio A of the magnetic toner particles' surface by the inorganic fine particles and a coverage ratio B of the magnetic toner particles' surface by the inorganic fine particles fixed to the magnetic toner particles' surface that reside in prescribed numerical value ranges; the binder resin contains a styrene resin; the release agent contains a monoester compound or a diester compound; and the softening temperature and softening point of the magnetic toner reside in prescribed temperature ranges.

Abstract translation: 一种磁性调色剂，包括：含有粘合剂树脂的磁性调色剂颗粒，磁性体和脱模剂; 和存在于磁性调色剂颗粒表面上的无机细颗粒，其中存在于磁性调色剂颗粒表面上的无机细颗粒含有金属氧化物细颗粒，含有二氧化硅微粒的金属氧化物细颗粒和任选地含有二氧化钛细颗粒 氧化铝微粒，二氧化硅微粒的含量相对于二氧化硅微粒，二氧化钛微粒和氧化铝微粒的总质量为85质量％以上，其中，磁性调色剂具有覆盖率A 的无机细颗粒的磁性调色剂颗粒表面和通过固定在磁性调色剂颗粒表面上的规定数值范围内的无机细颗粒的磁性调色剂颗粒表面的覆盖率B; 粘合剂树脂含有苯乙烯树脂; 脱模剂含有单酯化合物或二酯化合物; 并且磁性调色剂的软化温度和软化点在规定的温度范围内。

公开(公告)号：US09354545B2

公开(公告)日：2016-05-31

申请号：US14568058

申请日：2014-12-11

Applicant: CANON KABUSHIKI KAISHA

Inventor： Takashi Matsui ,  Michihisa Magome ,  Kozue Uratani ,  Atsuhiko Ohmori ,  Masaki Yamada ,  Minoru Ito

IPC: G03G15/08 ,  G03G9/083 ,  G03G9/093 ,  G03G9/097

CPC classification number: G03G15/0812 ,  G03G9/0833 ,  G03G9/0834 ,  G03G9/0836 ,  G03G9/09328 ,  G03G9/09385 ,  G03G9/09708 ,  G03G15/0818

Abstract: Provided is a developing apparatus, including: a toner for developing an electrostatic latent image; a toner carrier for carrying the toner; and a regulating member for regulating a layer thickness of the toner carried by the toner carrier, in which: the toner includes a toner containing toner particles each containing a binder resin and a magnetic material, and inorganic fine particles present on surfaces of the toner particles; the toner has a dielectric loss factor (∈″) at a frequency of 100 kHz and a temperature of 30° C. of 0.03 pF/m or more and 0.30 pF/m or less; the toner carrier includes a substrate, an elastic layer, and a surface layer containing a urethane resin; and the urethane resin has a partial structure derived from a reaction between a compound represented by the structural formula (1) and a polyisocyanate.

Abstract translation: 提供一种显影装置，包括：用于显影静电潜像的调色剂; 用于承载调色剂的调色剂载体; 以及用于调节由调色剂载体承载的调色剂的层厚度的调节构件，其中：调色剂包括含有各自含有粘合剂树脂和磁性材料的调色剂颗粒的调色剂和存在于调色剂颗粒表面上的无机细颗粒 ; 调色剂在100kHz的频率和30℃的温度下具有0.03pF / m以上且0.30pF / m以下的介电损耗因子（ε“）; 调色剂载体包括基材，弹性层和含有聚氨酯树脂的表面层; 并且所述聚氨酯树脂具有衍生自由结构式（1）表示的化合物与多异氰酸酯之间的反应的部分结构。

公开(公告)号：US09152065B2

公开(公告)日：2015-10-06

申请号：US14364636

申请日：2013-01-31

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tomohisa Sano ,  Michihisa Magome ,  Yusuke Hasegawa ,  Atsuhiko Ohmori

IPC: G03G9/083 ,  G03G9/097

CPC classification number: G03G9/0833 ,  G03G9/0836 ,  G03G9/0837 ,  G03G9/0839 ,  G03G9/09708 ,  G03G9/09725

Abstract: A magnetic toner includes: magnetic toner particles containing a binder resin and a magnetic body; and inorganic fine particles that are present on the surface of the magnetic toner particles and are not a magnetic iron oxide and magnetic iron oxide particles that are present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles contain metal oxide fine particles, the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles; when a coverage ratio A (%) is a coverage ratio of the magnetic toner particles' surface by the inorganic fine particles and a coverage ratio B (%) is a coverage ratio of the magnetic toner particles' surface by the inorganic fine particles that are fixed to the magnetic toner particles' surface, the coverage ratio A and B/A satisfy prescribed ranges; and the magnetic iron oxide particles present on the magnetic toner particles' surface are from at least 0.10 mass % to not more than 5.00 mass % with respect to the total amount of the magnetic toner.

Abstract translation: 磁性调色剂包括：含有粘合剂树脂和磁性体的磁性调色剂颗粒; 以及存在于磁性调色剂颗粒的表面上并且不是存在于磁性调色剂颗粒表面上的磁性氧化铁和磁性氧化铁颗粒的无机细颗粒，其中存在于磁性调色剂颗粒表面上的无机细颗粒 磁性调色剂颗粒含有金属氧化物微粒，含有二氧化硅微粒的金属氧化物微粒，任选地含有二氧化钛微粒和氧化铝微粒，二氧化硅微粒的含量相对于总质量为85质量％ 的二氧化硅微粒，二氧化钛微粒和氧化铝微粒; 当覆盖率A（％）是无机细颗粒的磁性调色剂颗粒表面的覆盖率和覆盖率B（％）时，磁性调色剂颗粒表面的无机微粒的覆盖率为 固定在磁性调色剂颗粒表面上，覆盖率A和B / A满足规定范围; 存在于磁性调色剂颗粒表面上的磁性氧化铁颗粒相对于磁性调色剂的总量为至少0.10质量％至不多于5.00质量％。

公开(公告)号：US09029055B2

公开(公告)日：2015-05-12

申请号：US13510283

申请日：2011-05-25

Applicant: Kozue Aoki ,  Yusuke Hasegawa ,  Yoshitaka Suzumura

Inventor： Kozue Aoki ,  Yusuke Hasegawa ,  Yoshitaka Suzumura

IPC: G03G9/083 ,  G03G9/08

CPC classification number: G03G9/0835 ,  G03G9/0802 ,  G03G9/0804 ,  G03G9/0833 ,  G03G9/0834 ,  G03G9/0836

Abstract: A magnetic toner which has superior charging stability and charging uniformity, maintains stable developing performance without any dependence on service environments and may less cause any decrease in image density and any image defects such as fog and ghost, the magnetic toner has magnetic toner particles, each of the magnetic toner particles has magnetic toner base particle containing a binder resin and a magnetic material, and an inorganic fine powder, (a) the magnetic toner having, at a frequency of 100 kHz and a temperature of 30° C., a dielectric loss factor (∈″) of 2.5×10−1 pF/m or more and 7.0×10−1 pF/m or less and a dielectric dissipation factor (tan δL) of 3.0×10−2 or less, (b) the magnetic toner having, in a dielectric dissipation factor (tan δ) thereof at a frequency of 100 kHz, a maximum value (tan δH) within the temperature range of 60° C. to 140° C.; and the tan δH and the tan δL satisfying (tan δH−tan δL)≦3.0×10−2.

Abstract translation: 具有优异的充电稳定性和充电均匀性的磁性调色剂在不依赖使用环境的情况下保持稳定的显影性能，并且可能较少导致图像浓度和任何图像缺陷（如雾和重影）的任何降低，磁性调色剂具有磁性调色剂颗粒 的磁性调色剂颗粒具有含有粘合剂树脂和磁性材料的磁性调色剂基础颗粒和无机细粉末，（a）磁性调色剂在100kHz的频率和30℃的温度下具有介电 2.5×10-1pF / m以上的损耗因子（∈“）和7.0×10-1pF / m以下的介电损耗因数（tanδL）为3.0×10 -2以下，（b） 在100kHz的频率的介电损耗因数（tanδ）中，在60℃〜140℃的温度范围内具有最大值（tanδH）的磁性调色剂。 tanδH和tanδL满足（tanδH-tanδL）＆nlE; 3.0×10-2。

公开(公告)号：US20140342277A1

公开(公告)日：2014-11-20

申请号：US14364633

申请日：2013-01-31

Applicant: CANON KABUSHIKI KAISHA

Inventor： Atsuhiko Ohmori ,  Michihisa Magome ,  Yusuke Hasegawa ,  Keisuke Tanaka

IPC: G03G9/083

CPC classification number: G03G9/0832 ,  G03G9/0821 ,  G03G9/0825 ,  G03G9/0827 ,  G03G9/0833 ,  G03G9/0836 ,  G03G9/0839 ,  G03G9/09708 ,  G03G9/09725

Abstract: The magnetic toner contains: magnetic toner particles containing a binder resin and a magnetic body; and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles comprise strontium titanate fine particles and metal oxide fine particles, and the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles. In addition, the magnetic toner has a characteristic state of coverage, by the inorganic fine particles, of the magnetic toner particle surface, and the ratio [D4/D1] of the weight-average particle diameter (D4) to the number-average particle diameter (D1) is in a prescribed range.

Abstract translation: 磁性调色剂含有：含有粘结剂树脂和磁性体的磁性调色剂颗粒; 和存在于磁性调色剂颗粒表面上的无机细颗粒，其中存在于磁性调色剂颗粒表面上的无机细颗粒包括钛酸锶细颗粒和金属氧化物微粒，并且含有二氧化硅微粒的金属氧化物微粒， 并且任选地含有二氧化钛微粒和氧化铝微粒，相对于二氧化硅微粒，二氧化钛微粒和氧化铝微粒的总质量，二氧化硅微粒的含量为85质量％以上。 此外，磁性调色剂具有磁性调色剂颗粒表面的无机细颗粒的覆盖特性状态和重均粒径（D4）与数均粒子的比例[D4 / D1] 直径（D1）在规定范围内。

公开(公告)号：US08501377B2

公开(公告)日：2013-08-06

申请号：US13354092

申请日：2012-01-19

Applicant: Toru Takahashi ,  Katsuhisa Yamazaki ,  Shuhei Moribe ,  Daisuke Tsujimoto ,  Masami Fujimoto

Inventor： Toru Takahashi ,  Katsuhisa Yamazaki ,  Shuhei Moribe ,  Daisuke Tsujimoto ,  Masami Fujimoto

IPC: G03G9/08

CPC classification number: G03G9/0833 ,  G03G9/0823 ,  G03G9/0835 ,  G03G9/0836 ,  G03G9/08755

Abstract: Provided is a magnetic toner capable of providing a stable image by suppressing sleeve contamination even under a high-temperature and high-humidity environment and under a normal-temperature and low-humidity environment and further suppressing large-particle fogging caused after the toner is left alone for a week. The magnetic toner contains toner particles, each of which contains a binder resin and a magnetic iron oxide particle, in which the binder resin has a polyester unit, the toner has i) a dielectric loss factor at 40° C. and 100 kHz of 0.50 pF/m or more but 0.90 pF/m or less, and ii) a true specific gravity of 1.50 g/cm3 or more but 1.85 g/cm3 or less.

Abstract translation: 提供一种即使在高温高湿环境下也能在常温低湿环境下即使通过抑制套筒污染来提供稳定图像的磁性调色剂，并且进一步抑制了在调色剂剩余之后引起的大颗粒起雾 独自一个星期。 磁性调色剂含有调色剂颗粒，每个调色剂颗粒含有粘合剂树脂和磁性氧化铁颗粒，其中粘合剂树脂具有聚酯单元，调色剂具有i）在40℃和100kHz的介电损耗系数为0.50 pF / m以上，0.90pF / m以下，ii）真比重为1.50g / cm 3以上，1.85g / cm 3以下。

公开(公告)号：US20120231384A1

公开(公告)日：2012-09-13

申请号：US13510283

申请日：2011-05-25

Applicant: Kozue Aoki ,  Yusuke Hasegawa ,  Yoshitaka Suzumura

Inventor： Kozue Aoki ,  Yusuke Hasegawa ,  Yoshitaka Suzumura

IPC: G03G9/087

CPC classification number: G03G9/0835 ,  G03G9/0802 ,  G03G9/0804 ,  G03G9/0833 ,  G03G9/0834 ,  G03G9/0836

Abstract: A magnetic toner which has superior charging stability and charging uniformity, maintains stable developing performance without any dependence on service environments and may less cause any decrease in image density and any image defects such as fog and ghost, the magnetic toner has magnetic toner particles, each of the magnetic toner particles has magnetic toner base particle containing a binder resin and a magnetic material, and an inorganic fine powder, (a) the magnetic toner having, at a frequency of 100 kHz and a temperature of 30° C., a dielectric loss factor (ε″) of 2.5×10−1 pF/m or more and 7.0×10−1 pF/m or less and a dielectric dissipation factor (tan δL) of 3.0×10−2 or less, (b) the magnetic toner having, in a dielectric dissipation factor (tan Δ) thereof at a frequency of 100 kHz, a maximum value (tan δH) within the temperature range of 60° C. to 140° C.; and the tan δH and the tan δL satisfying (tan δH−tan δL)≦3.0×10−2.

Abstract translation: 具有优异的充电稳定性和充电均匀性的磁性调色剂在不依赖使用环境的情况下保持稳定的显影性能，并且可能较少导致图像浓度和任何图像缺陷（如雾和重影）的任何降低，磁性调色剂具有磁性调色剂颗粒 的磁性调色剂颗粒具有含有粘合剂树脂和磁性材料的磁性调色剂基础颗粒和无机细粉末，（a）磁性调色剂在100kHz的频率和30℃的温度下具有介电 2.5×10-1pF / m以上且7.0×10-1pF / m以下的损耗因子（＆egr“）和介电损耗因数（tanδL）为3.0×10 -2以下，（b） 磁性调色剂在100kHz的频率的介电损耗因数（tan＆Dgr））中，在60℃至140℃的温度范围内具有最大值（tanδH）。 tanδH和tanδL满足（tanδH-tanδL）＆nlE; 3.0×10-2。