公开(公告)号：JP2010230941A

公开(公告)日：2010-10-14

申请号：JP2009077765

申请日：2009-03-26

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： YOSHIOKA NOBUYUKI ,  KAMOTO TAKANORI ,  WADA OSAMU ,  IWAMATSU TADASHI

IPC: G03G15/08

Abstract: PROBLEM TO BE SOLVED: To provide an image forming apparatus efficiently collecting a carrier sticking to the surface of a photoreceptor, on which a toner image is formed, without deteriorating image quality. SOLUTION: The image forming apparatus 1 includes the photoreceptor 10 carrying an electrostatic latent image, and a development means 20 developing the electrostatic latent image by a two-component developer containing the carrier and a toner. In the development means 20, a developing roller 21 supplies the toner to the electrostatic latent image, a carrier collection roller 23, to which a bias voltage with polarity equal to the charging polarity of the toner is applied by a carrier collection bias power supply 24, collects the carrier sticking to the photoreceptor 10. In this process, a vibration means 25 applies mechanical vibration to the carrier collection roller 23. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供一种图像形成装置，其有效地收集粘附到其上形成有调色剂图像的感光体的表面的载体，而不会降低图像质量。 解决方案：图像形成装置1包括承载静电潜像的感光体10和显影装置20，其通过含有载体的二组分显影剂和调色剂显影静电潜像。 在显影装置20中，显影辊21将调色剂供给到静电潜像，载体收集辊23通过载体收集偏压电源24施加极性等于调色剂的充电极性的偏置电压 收集承载在感光体10上的载体。在此过程中，振动装置25对载体收集辊23施加机械振动。版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2014153422A

公开(公告)日：2014-08-25

申请号：JP2013020639

申请日：2013-02-05

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： WADA OSAMU ,  KATAOKA TOSHIHARU ,  TSUBAKI YORIHISA

IPC: G03G9/113 ,  G03G9/08 ,  G03G21/10

Abstract: PROBLEM TO BE SOLVED: To provide an image forming method of preventing scratch of a surface of a photoreceptor even when used in a low-humidity environment for a long time, in a two-component color image forming apparatus which employs a cleaning blade as cleaning means of an electronic photoreceptor.SOLUTION: In a two-component color developing apparatus which employs a cleaning blade as cleaning means of an electronic photoreceptor, two-component developer for electrophotography includes resin-coated carrier and toner formed by externally adding an external additive formed of particles having an average primary particle diameter of 50-200 nm, and shaving amount of a coating layer in deterioration test of the resin-coated carrier is 0.1% or less of resin-coated carrier weight in the developer before the test.

Abstract translation: 要解决的问题：为了提供一种在使用清洁刮板作为清洁的双组分彩色图像形成装置中，即使长时间在低湿度环境中使用也能防止感光体表面划痕的图像形成方法 电子感光体的装置。解决方案：在使用清洁刮板作为电子感光体的清洁装置的双组分彩色显影装置中，用于电子照相术的双组分显影剂包括树脂涂覆的载体和由外部添加形成的外部添加剂形成的调色剂 的平均一次粒径为50〜200nm的粒子，树脂被覆载体的劣化试验中的被覆层的剃刮量为试验前的显影剂中树脂被覆载体重量的0.1％以下。

公开(公告)号：JP2013120281A

公开(公告)日：2013-06-17

申请号：JP2011268048

申请日：2011-12-07

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： WADA OSAMU ,  KAMOTO TAKANORI

IPC: G03G9/113 ,  G03G9/107

Abstract: PROBLEM TO BE SOLVED: To provide a carrier for electrophotography that has excellent transfer efficiency and is capable of charging toner stably for a long period; and a two-component developer including the carrier.SOLUTION: A carrier for electrophotography comprises a carrier core material made of ferrite; and a resin layer that coats the carrier core material, and contains strontium ferrite fine particles that are not electrically conductive under application of a voltage of 1000 V and have a resistance value of 10to 10Ω cm as magnetic fine particles.

Abstract translation: 要解决的问题：提供转印效率优异并且能够长时间稳定地对调色剂充电的电子照相用载体; 和包含载体的双组分显影剂。 解决方案：用于电子照相的载体包括由铁氧体制成的载体芯材料; 以及涂覆载体芯材的树脂层，并且在施加1000V的电压且电阻值为10 7的情况下包含不导电的锶铁氧体细颗粒 至10 9 Ωcm作为磁性细颗粒。 版权所有（C）2013，JPO＆INPIT

公开(公告)号：JP2011075855A

公开(公告)日：2011-04-14

申请号：JP2009227527

申请日：2009-09-30

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： KAMOTO TAKANORI ,  YAMANAKA TAKAYUKI ,  WADA OSAMU ,  IWAMATSU TADASHI

IPC: G03G9/113 ,  G03G9/09 ,  G03G9/107

Abstract: PROBLEM TO BE SOLVED: To provide a carrier for forming a high-quality image while simplifying the manufacturing process and reducing the manufacturing cost.
SOLUTION: This carrier 2 is a carrier 2 for a two-component developer. The carrier 2 includes a carrier core material 2a having a volume average particle diameter of 25 μm or larger and 50 μm or smaller and a coating 2b that contains silicone resin having the average molecular weight of 5,000 or smaller as the principal component and covers the carrier core material 2a. The coating 2b is formed by applying heat and impact force to a mixture of resin composition containing silicone resin and the carrier core material 2a.
COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供用于形成高质量图像的载体，同时简化制造过程并降低制造成本。 解决方案：该载体2是用于双组分显影剂的载体2。 载体2包括体积平均粒径为25μm以上且50μm以下的载体芯材2a和含有平均分子量为5000以下的硅酮树脂作为主要成分并覆盖载体的涂层2b 芯材2a。 涂层2b通过对含有硅树脂的树脂组合物和载体芯材2a的混合物施加热和冲击力而形成。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2011064916A

公开(公告)日：2011-03-31

申请号：JP2009214982

申请日：2009-09-16

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： YAMANAKA TAKAYUKI ,  KAMOTO TAKANORI ,  WADA OSAMU ,  IWAMATSU TADASHI

IPC: G03G9/113

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a resin-coated carrier, in which a carrier core material comprising a porous material having voids therein is used, and a resin-coated carrier having no resin in the voids can be obtained with a smaller amount of the resin.
SOLUTION: The method for producing a resin-coated carrier comprising a carrier core material and a resin coating layer formed on the surface of the carrier core material includes an immersion step and heat-drying step. In the immersion step, the carrier core material comprising a porous material having voids therein is immersed in an immersion liquid containing a resin and a foaming agent dissolved or dispersed in a solvent so as to obtain an impregnated carrier core material having the voids impregnated with the immersion liquid. In the heat-drying step, the impregnated carrier core material is heated while agitated at a temperature equal to or higher than the boiling point of the solvent and equal to or higher than the decomposition temperature of the foaming agent to form a film of the resin on the surface of the carrier core material, thereby obtaining the resin-coated carrier having a resin coating layer on the surface of the carrier core material.
COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供一种制备树脂涂布载体的方法，其中使用包含其中具有空隙的多孔材料的载体芯材料，并且在空隙中不具有树脂的树脂涂布载体可以是 用较少量的树脂获得。 解决方案：在载体芯材表面上形成载体芯材和树脂涂层的树脂涂布载体的制造方法包括浸渍工序和加热干燥工序。 在浸渍步骤中，将包含其中具有空隙的多孔材料的载体芯材浸渍在含有溶解或分散在溶剂中的树脂和发泡剂的浸渍液中，以获得浸渍的载体芯材料，其浸渍有空隙 浸液 在加热干燥步骤中，将浸渍的载体芯材料在等于或高于溶剂沸点的温度下搅拌加热等于或高于发泡剂的分解温度以形成树脂膜 在载体芯材的表面上，由此获得在载体芯材表面上具有树脂涂层的树脂涂布载体。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2011022217A

公开(公告)日：2011-02-03

申请号：JP2009165170

申请日：2009-07-13

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： YOSHIOKA NOBUYUKI ,  KAMOTO TAKANORI ,  WADA OSAMU ,  IWAMATSU TADASHI

IPC: G03G9/08 ,  G03G9/107 ,  G03G9/113 ,  G03G15/08

CPC classification number: G03G9/0825 ,  G03G9/08782 ,  G03G9/1075 ,  G03G9/1131 ,  G03G9/1136 ,  G03G2215/0607

Abstract: PROBLEM TO BE SOLVED: To provide a two-component developer that has excellent flowability, stably charges toner, and stably forms a high-definition image over a long period of time. SOLUTION: The two-component developer includes a toner 3 containing a binder resin, a colorant, and a release agent, and a resin-coated carrier 2 comprising a carrier core material 2a and a resin coating layer 2b formed on a surface of the carrier core material 2a. The toner 3 has an exposure rate of the release agent on the toner 3 surface of 1.00-3.07%. The carrier core material 2a has an apparent density of 1.86-2.45 g/cm 3 . The exposure rate of the release agent of the toner 3 and the apparent density of the carrier core material 2a satisfy the following formula (1) y≤-1.54x+5.93, wherein y represents the exposure rate of the release agent of the toner 3, and x represents the apparent density of the carrier core material 2a. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：为了提供具有优异流动性的双组分显影剂，稳定地对调色剂充电，并且在长时间内稳定地形成高清晰度图像。 解决方案：双组分显影剂包括含有粘合剂树脂，着色剂和脱模剂的调色剂3和包含载体芯材料2a和形成在表面上的树脂涂层2b的树脂涂布载体2 的载体芯材2a。 调色剂3具有1.00-3.07％的调色剂3表面上的脱模剂的曝光率。 载体芯材2a具有1.86-2.45g / cm 3的表观密度。 调色剂3的脱模剂的曝光率和载体芯材2a的表观密度满足下式（1）y≤-1.54x + 5.93，其中y表示调色剂3的脱模剂的曝光率 ，x表示载体芯材2a的表观密度。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2010169836A

公开(公告)日：2010-08-05

申请号：JP2009011421

申请日：2009-01-21

Applicant: Kanto Denka Kogyo Co Ltd ,  Sharp Corp ,  シャープ株式会社 ,  関東電化工業株式会社

Inventor： WADA OSAMU ,  IWAMATSU TADASHI ,  KAMOTO TAKANORI ,  YOSHIOKA NOBUYUKI ,  MATSUURA NATSUKI ,  SEKI NOBUHIRO ,  HAYASHI MASATOMO

IPC: G03G9/113 ,  G03G9/08 ,  G03G9/10

CPC classification number: G03G9/1136 ,  G03G9/107 ,  G03G2215/0607

Abstract: PROBLEM TO BE SOLVED: To provide a resin coated carrier for stably charging toner with an external additive having a large particle size added thereto for a long time and preventing blocking of a developer; a two-component developer; a developing device; and an image forming apparatus. SOLUTION: The resin coated carrier is produced so as to satisfy the following formulas (1) and (2). Formula (1): log(Mb/Ma)>2. Formula (2): 0.5≤-log(A/B)≤2.5. In formula (1), Ma represents a weight average molecular weight of a silicone resin having a minimum weight average molecular weight, and Mb represents a weight average molecular weight of a silicone resin having a maximum weight average molecular weight, both silicon resins being included in a resin coating layer 2b. In formula (2), A represents a volume resistivity value (Ω/cm) in an electric field of 1,000 V/cm that is obtained by conducting a stirring test, and B represents a volume resistivity value (Ω/cm) in an electric field of 1,000 V/cm before the stirring test. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：提供一种树脂涂布载体，用于长时间加入其中具有大粒径的外部添加剂以稳定地对调色剂充电并防止显影剂的堵塞; 一个双组分开发商; 显影装置; 和图像形成装置。 解决方案：制备树脂涂布载体以满足下式（1）和（2）。 公式（1）：log（Mb / Ma）> 2。 式（2）：0.5≤-log（A / B）≤2.5。 在式（1）中，Ma表示具有最小重均分子量的有机硅树脂的重均分子量，Mb表示具有最大重均分子量的硅树脂的重均分子量，包括两种硅树脂 在树脂涂层2b中。 在式（2）中，A表示通过进行搅拌试验得到的1000V / cm的电场中的体积电阻率值（Ω/ cm），B表示电气中的体积电阻率值（Ω/ cm） 在搅拌试验前为1000V / cm的场。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2010026259A

公开(公告)日：2010-02-04

申请号：JP2008187772

申请日：2008-07-18

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： ICHII CHIKAO ,  IWAMATSU TADASHI ,  HIRAKAWA HIROYUKI ,  YOSHIOKA NOBUYUKI ,  WADA OSAMU

IPC: G03G9/113 ,  G03G9/08 ,  G03G9/107 ,  G03G15/08

Abstract: PROBLEM TO BE SOLVED: To provide a carrier which, in long-term use in an actual machine, suppresses deterioration of the fluidity of a developer and can stably retain charging performance to a toner. SOLUTION: The magnetic carrier 2 comprises a carrier core material 2a having a shape factor (SF-1) of 100-130 and a coating layer 2b comprising a resin composition for coating containing a coating resin and an aminosilane coupling agent. A coating amount of the resin composition to the carrier core material 2a is ≤0.75 pt.wt. based on 100 pts.wt. of the carrier core material 2a, and a content of the aminosilane coupling agent to the coating resin is ≤2.5 wt.%. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：提供一种长期在实际机器中使用的载体，其抑制显影剂的流动性的劣化并且可以稳定地保持对调色剂的充电性能。 磁性载体2包括具有100-130的形状因子（SF-1）的载体芯材2a和包含含有涂料树脂和氨基硅烷偶联剂的涂料用树脂组合物的涂层2b。 载体芯材2a的树脂组合物的涂布量为≤0.75重量份。 基于100重量 的载体芯材2a，并且氨基硅烷偶联剂对涂布树脂的含量≤2.5重量％。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2010015066A

公开(公告)日：2010-01-21

申请号：JP2008176385

申请日：2008-07-04

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： WADA OSAMU ,  KAMOTO TAKANORI ,  IWAMATSU TADASHI ,  YOSHIOKA NOBUYUKI ,  HIRAKAWA HIROYUKI ,  MUTO YOSHINORI ,  HARA TAKASHI ,  KANDA HIROFUMI ,  ICHII CHIKAO

IPC: G03G9/10 ,  G03G9/08 ,  G03G9/113

CPC classification number: G03G9/1136 ,  G03G9/08755 ,  G03G9/09716 ,  G03G9/09725 ,  G03G9/1075 ,  G03G9/1139

Abstract: PROBLEM TO BE SOLVED: To provide a resin coated carrier for stably charging toner with an external additive of a large grain diameter added thereto for a long time, a two-component developer containing the carrier, and a developing device and image forming apparatus for forming a high quality image with no fog for a long time using the two-component developer. SOLUTION: The resin coated carrier is used with a toner in which an external additive having an average primary particle size of 50 nm or more is added to a toner particle, and has a carrier core and a resin coating layer on the surface of the carrier core. In the resin coated carrier, the following expression (1) is satisfied: 0.5≤-logä(A/C)/(B/C)}≤2.5 wherein A represents a volume resistance value (Ω/cm) of the resin coated carrier in an electric field of 1000 V/cm that is obtained by conducting a stirring test, B represents a volume resistance value of the resin coated carrier in an electric field of 1000 V/cm before the stirring test, and C represents a volume resistance value (Ω/cm) of the carrier core in an electric field of 1000 V/cm. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：为了提供一种树脂涂布载体，用于长时间加入其中的大粒径外部添加剂的调色剂稳定地充电，含有载体的双组分显影剂以及显影装置和图像形成 使用双组分显影剂长时间形成高质量图像的装置。 ＆lt; P＆gt;解决方案：将树脂涂布载体与调色剂一起使用，其中将平均一次粒径为50nm以上的外部添加剂添加到调色剂颗粒中，并且在表面上具有载体芯和树脂涂层 的载体核心。 在树脂涂布载体中，满足以下表达式（1）：0.5≤-logä（A / C）/（B / C）}≤2.5其中A表示树脂涂布载体的体积电阻值（Ω/ cm） 在通过搅拌试验得到的1000V / cm的电场中，B表示在搅拌试验前的1000V / cm的电场中的树脂被覆载体的体积电阻值，C表示体积电阻值 （Ω/ cm）的载流子芯在1000V / cm的电场中。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2013120218A

公开(公告)日：2013-06-17

申请号：JP2011266909

申请日：2011-12-06

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： KAMOTO TAKANORI ,  WADA OSAMU

IPC: G03G9/113 ,  G03G9/107

Abstract: PROBLEM TO BE SOLVED: To provide a carrier for electrophotography that has excellent transfer efficiency, is capable of charging toner stably for a long period, and prevents occurrence of carrier deposition or white streaks in an image; and a two-component developer including the carrier.SOLUTION: A carrier for electrophotography comprises a carrier core material made of ferrite; and a resin layer that coats the carrier core material, and contains magnetite fine particles that are not electrically conductive under application of a voltage of 1000 V and have a resistance value of 10to 10Ω cm as magnetic particles.

Abstract translation: 要解决的问题：为了提供转印效率优异的电子照相用载体，能够长时间稳定地对调色剂进行充电，并且防止载体沉积或图像中的白色条纹的发生; 和包含载体的双组分显影剂。 解决方案：用于电子照相的载体包括由铁氧体制成的载体芯材料; 以及涂布载体芯材的树脂层，并且在施加1000V的电压且电阻值为10 7 的情况下，含有不导电的磁铁矿微粒， 10 9 Ωcm作为磁性颗粒。 版权所有（C）2013，JPO＆INPIT