公开(公告)号：JP2014153424A

公开(公告)日：2014-08-25

申请号：JP2013020643

申请日：2013-02-05

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： TSUBAKI YORIHISA ,  KIKAWA KEIICHI ,  WADA OSAMU ,  KONO TOMOI

IPC: G03G9/08 ,  G03G9/087

Abstract: PROBLEM TO BE SOLVED: To provide toner which can be manufactured in a short time even in using a resin containing mainly a resin of relatively large molecular weight, as a binder resin, for satisfying low-temperature fixability and hot offset resistance in a belt fixing apparatus, and ensures stable printing even if a toner particle diameter is reduced to 5.5-7.0 μm, and to provide an image forming apparatus using the toner and an image forming method.SOLUTION: Toner for electrophotography includes at least a binder resin, a colorant, a mold-releasing agent, and a grinding aid resin. The grinding aid resin is formed of a resin different from a resin constituting the binder resin and the mold-releasing agent. A ratio of the toner at a molecular weight of less than 40,000 is 70% or more, and a ratio at a molecular weight of 500,000 or more is 5-10%. Resin particles having a mean particle diameter of 0.2-0.5 μm are dispersed in the binder resin.

Abstract translation: 要解决的问题：即使在使用主要含有较大分子量树脂的树脂作为粘合剂树脂的情况下，为了提供可以在短时间内制造的调色剂，以满足带固定中的低温定影性和耐热胶印性 装置，并且即使调色剂颗粒直径减小到5.5-7.0μm，也确保稳定的印刷，并且提供使用调色剂的图像形成装置和图像形成方法。溶液：用于电子照相的调色剂至少包括粘合剂树脂，着色剂 ，脱模剂和研磨助剂树脂。 研磨助剂树脂由与构成粘合剂树脂的树脂和脱模剂不同的树脂形成。 分子量小于40,000的调色剂的比率为70％以上，分子量为500,000以上的比例为5-10％。 平均粒径为0.2-0.5μm的树脂颗粒分散在粘合剂树脂中。

公开(公告)号：JP2013238734A

公开(公告)日：2013-11-28

申请号：JP2012111686

申请日：2012-05-15

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 good transfer efficiency, can charge toner stably for a long period, and prevents the occurrence of carrier depletion and white streaks of images; and a two-component developer including the carrier for electrophotography.SOLUTION: A carrier for electrophotography consists of a carrier core material made of ferrite; and a resin layer that covers the carrier core material, and contains magnetic fine particles that are not conductive under 1000 V applied voltage and have a resistance value of 10to 10Ω cm, and thermosetting organic fine particles having a triazine ring.

Abstract translation: 要解决的问题：为了提供具有良好转印效率的电子照相用载体，可以长时间稳定地对调色剂进行充电，并且防止载体耗尽和图像的白色条纹的发生; 和包含电子照相载体的双组分显影剂。解决方案：用于电子照相的载体由铁氧体制成的载体芯材料组成。 覆盖载体芯材的树脂层，含有在1000V施加电压下不导电且电阻值为10〜10Ω的磁性微粒; cm，和具有三嗪环的热固性有机细颗粒。

公开(公告)号：JP2013182109A

公开(公告)日：2013-09-12

申请号：JP2012045359

申请日：2012-03-01

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： WADA OSAMU ,  KAMOTO TAKANORI

IPC: G03G9/113 ,  G03G9/107

CPC classification number: G03G9/107 ,  G03G9/113 ,  G03G9/1131 ,  G03G9/1139

Abstract: PROBLEM TO BE SOLVED: To provide an electrophotography carrier having excellent transfer efficiency and capable of causing toner to be stably charged for a long time, and a two-component developer containing the same.SOLUTION: An electrophotography carrier is configured from: a carrier core material formed from a ferrite; and a resin layer for covering the carrier core material and containing barium ferrite fine particles as magnetic fine particles, the barium ferrite fine particles not exhibiting conductivity at a voltage application under 1000 V and having a resistance value of 10-10Ω cm.

Abstract translation: 要解决的问题：提供具有优异的转印效率并能够使调色剂长时间稳定地充电的电子照相载体和包含其的双组分显影剂。溶液：电子照相载体由以下构成：载体芯 由铁素体形成的材料; 以及用于覆盖载体芯材并含有作为磁性细颗粒的钡铁氧体微粒的树脂层，所述钡铁氧体细颗粒在施加电压为1000V且电阻值为10-10＆OHgr的情况下不显示导电性; 厘米。

公开(公告)号：JP2012048167A

公开(公告)日：2012-03-08

申请号：JP2010192919

申请日：2010-08-30

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： IMURA YASURO ,  WADA OSAMU ,  KAMOTO TAKANORI ,  IWAMATSU TADASHI

IPC: G03G9/113

Abstract: PROBLEM TO BE SOLVED: To provide a manufacturing method of a resin coated carrier in which a resin coating layer is formed on the surface of a carrier core material, adhesion between the carrier core material and the resin coating layer is excellent and thus separation of the resin coating layer is prevented, and contamination of the carrier by toner spent can be restricted, with stable charging of a toner allowed for a long term.SOLUTION: A manufacturing method of a resin coated carrier includes a composite particle producing step s1, a dispersion liquid preparation step s2 and a coating step s3. In the composite particle producing step s1, composite particles with resin fine particles attached on the surfaces of magnetic fine particles are obtained. In the dispersion liquid preparation step s2, a dispersion liquid in which the composite particles are dispersed in solution with coating resin dissolved in a solvent is prepared. In the coating step s3, the dispersion liquid and a carrier core material are mixed, and after the dispersion liquid is attached on the surface of the carrier core material, a resin coating layer is formed on the surface of the carrier core material by removing the solvent under heating.

Abstract translation: 要解决的问题：为了提供在载体芯材的表面上形成树脂涂层的树脂涂布载体的制造方法，载体芯材与树脂被覆层之间的粘附性优异，因此 防止树脂涂层的分离，并且可以限制通过调色剂消耗的载体的污染，从而长期稳定地进行调色剂的充电。 解决方案：树脂涂布载体的制造方法包括复合颗粒制造步骤s1，分散液制备步骤s2和涂布步骤s3。 在复合颗粒制造步骤s1中，获得附着在磁性细颗粒表面上的具有树脂细颗粒的复合颗粒。 在分散液制备步骤s2中，制备其中将复合颗粒分散在溶液中的涂布树脂溶解在溶剂中的分散液。 在涂布步骤s3中，分散液和载体芯材料混合，分散液附着在载体芯材的表面上之后，通过除去载体芯材的表面形成树脂被覆层 溶剂在加热下。 版权所有（C）2012，JPO＆INPIT

公开(公告)号：JP2011164230A

公开(公告)日：2011-08-25

申请号：JP2010024864

申请日：2010-02-05

Applicant: Sharp Corp ,  シャープ株式会社

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

IPC: G03G9/113

Abstract: PROBLEM TO BE SOLVED: To provide a resin coated carrier achieving a long life of the carrier and low power consumption by decrease in an agitation torque and capable of stably charging toner even when the number of sheets for printing increases, and to provide a method for producing the resin coated carrier, and a two-component developer containing the resin coated carrier. SOLUTION: The resin coated carrier comprises a carrier core material, a resin coating layer formed on the surface of the carrier core material, and nitrogen-containing crosslinked resin fine particles. The carrier core material comprises a porous material having pores on the surface and has an apparent density of 1.6 g/cm 3 or more and 2.0 g/cm 3 or less. The nitrogen-containing crosslinked resin fine particles satisfy expression (1):(Db+0.3 μm)≥Da>Db, wherein Da (μm) represents the volume average particle diameter of the fine particles and Db (μm) represents the area average diameter of the pores. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：为了提供一种树脂涂布载体，通过降低搅拌转矩实现寿命长，并且即使当打印纸张数增加时也能够稳定地对调色剂进行充电，并且提供 树脂涂布载体的制造方法和含有树脂被覆载体的双组分显影剂。 解决方案：树脂涂布载体包括载体芯材料，形成在载体芯材表面上的树脂涂层和含氮交联树脂细颗粒。 载体芯材料包括在表面上具有孔的多孔材料，其表观密度为1.6g / cm 3以上且2.0g / cm 3以上，SP 3以下。 含氮交联树脂微粒满足表达式（1）:( Db +0.3μm）≥Da> Db，其中Da（μm）表示微粒的体积平均粒径，Db（μm）表示面积平均直径 的毛孔。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2011034012A

公开(公告)日：2011-02-17

申请号：JP2009182904

申请日：2009-08-05

Applicant: Sharp Corp ,  シャープ株式会社

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

IPC: G03G9/113

Abstract: PROBLEM TO BE SOLVED: To provide a resin-coated carrier which prevents its resin-coated layer formed on a surface of a carrier core material from being inconsistent in thickness to stably electrify a toner.
SOLUTION: The resin-coated carrier 50 has the carrier core material 51 and the resin-coated layer 52 formed on the surface of the carrier core material 51. The carrier core material 51 is composed of a porous material in which surface pores 51a are formed, and its apparent density is 1.6 g/cm
3 or larger and 2.0 g/cm
3 or smaller. The resin-coated layer 52 is a layer; which is formed by a spray coating method and includes 1 pt.wt. or more and 5 pts.wt. or less of resin per 100 pts.wt. of the carrier core material 51; and contains crosslinked type resin microparticles 53. Then, the resin-coated carrier 50 is composed so that a volume average particle diameter of the crosslinked type resin microparticles 53 contained in the resin-coated layer 52 and an area average diameter of the surface pores 51a may satisfy a prescribed relational expression.
COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供一种树脂涂覆的载体，其防止其形成在载体芯材表面上的树脂涂层的厚度不一致以稳定地带电调色剂。 解决方案：树脂被覆载体50具有载体芯材51和形成在载体芯材51的表面上的树脂涂层52.载体芯材51由多孔材料构成，其中表面孔 51a形成，其表观密度为1.6g / cm 3以上且2.0g / cm 3以上。 树脂涂层52是层; 其通过喷涂法形成，并且包括1重量份 或更多和5磅 或更少的树脂/ 100重量份 的载体芯材51; 并且含有交联型树脂微粒53.然后，树脂被覆载体50构成为使树脂被覆层52中所含的交联型树脂微粒53的体积平均粒径和表面孔51a的面积平均直径 可以满足规定的关系表达式。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2010230940A

公开(公告)日：2010-10-14

申请号：JP2009077764

申请日：2009-03-26

Applicant: Sharp Corp ,  シャープ株式会社

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

IPC: G03G9/113

Abstract: PROBLEM TO BE SOLVED: To provide: a resin-coated carrier dry-coated with a resin coating layer comprising acrylic-modified silicone resin particles, the carrier being prevented from aggregation of carrier particles during production and having excellent stability in toner charging ability for a long period of time; a two-component developer containing the resin-coated carrier; a developing device and an image forming apparatus which use the two-component developer; and a method for producing the resin-coated carrier. SOLUTION: The resin coated carrier has a resin coating layer formed on a carrier core material surface. The resin coating layer is formed in a dry system by using the acrylic-modified silicone resin particles and contains 11 to 32% silicone component based on a total weight of resin included in the resin coating layer. The two-component developer including this resin-coated carrier is filled in a developing device in the image forming apparatus to form an image. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供：用包含丙烯酸改性的有机硅树脂颗粒的树脂涂层干涂覆的树脂涂布载体，防止载体在生产过程中聚集，并且在调色剂充电中具有优异的稳定性 能力很长一段时间; 含有树脂被覆载体的双组分显影剂; 使用双组分显影剂的显影装置和图像形成装置; 以及树脂被覆载体的制造方法。

解决方案：树脂涂覆的载体具有形成在载体芯材表面上的树脂涂层。 树脂涂层通过使用丙烯酸改性的有机硅树脂颗粒在干燥体系中形成，并且包含基于树脂涂层中包含的树脂的总重量的11至32％的硅氧烷组分。 将包含该树脂涂布载体的双组分显影剂填充在图像形成装置中的显影装置中以形成图像。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2009276532A

公开(公告)日：2009-11-26

申请号：JP2008127303

申请日：2008-05-14

Applicant: Sharp Corp ,  シャープ株式会社

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

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

Abstract: PROBLEM TO BE SOLVED: To achieve carrier for two-component developer, stably maintaining charging quantity of toner, having a coating layer of carrier favorably coated, and outputting a high image quality image without image defect such as adhesion of carrier over a long period of time. SOLUTION: In the coating layer 2b of a carrier core material 2a surface of the carrier 2, binder resin containing at least one of silicone resin and its denatured resin includes: an amino silane coupling agent; a hardening catalyst, which is an organic metal compound for controlling the hardening speed of the binder resin; a negative charge control agent, which is a negatively charged salt compound to the carrier core material 2a surface or the coating layer 2b; and conductive particles. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：为了实现双组分显影剂的载体，稳定地保持具有载体的涂层的调色剂的充电量，并且输出高图像质量的图像，没有图像缺陷，例如载体粘附在 很长一段时间 解决方案：在载体芯材2a的载体2的表面的涂层2b中，含有硅树脂及其变性树脂中的至少一种的粘合剂树脂包括：氨基硅烷偶联剂; 硬化催化剂，其是用于控制粘合剂树脂的硬化速度的有机金属化合物; 负载电荷控制剂，其为载体芯材2a表面或涂层2b的带负电荷的盐化合物; 和导电粒子。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2009276472A

公开(公告)日：2009-11-26

申请号：JP2008126371

申请日：2008-05-13

Applicant: Sharp Corp ,  シャープ株式会社

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

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

Abstract: PROBLEM TO BE SOLVED: To provide carrier, restraining adhesion of carrier, and preventing worsening of flowability of a developer to maintain image formation with high image quality over a long period of time. SOLUTION: This carrier 1 is carrier 1 having a coating layer 3 on the surface of a core material 2. The coating layer 3 is formed of silicone resin including acrylic denatured silicone resin, and a shape factor (SF-1) of the core material 2 is 110-135, so that image formation with high image quality can be maintained over a long period of time. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：为了提供载体，抑制载体的粘附性，并且防止显影剂的流动性的恶化以长时间保持具有高图像质量的图像形成。 解决方案：载体1是在芯材2的表面上具有涂层3的载体1.涂层3由包含丙烯酸改性的有机硅树脂的硅树脂和形状因子（SF-1）形成， 芯材2为110-135，可以长时间维持高图像质量的图像形成。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2012083389A

公开(公告)日：2012-04-26

申请号：JP2010227065

申请日：2010-10-06

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： WADA OSAMU ,  KAMOTO TAKANORI ,  IMURA YASURO ,  IWAMATSU TADASHI

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

Abstract: PROBLEM TO BE SOLVED: To provide a resin coated carrier capable of stably charging a toner with an external additive having a large particle diameter externally added thereto for a long period of time, and to provide a two-component developer.SOLUTION: A resin coated carrier 2 is used together with a toner 3 to which a plurality of kinds of external additives 3a having different average primary particle diameters are externally added, in which at least one kind of external additive 3a in the plurality of kinds of external additives 3a has an average primary particle diameter of 50 nm or more. The carrier comprises a carrier core material 2a and a resin coating layer 2b formed on the surface of the carrier core material 2a. The resin coated layer 2b comprises a coating resin and charging assistant fine particles 2c. The charging assistant fine particles 2c form projections 2d in the resin coating layer 2b, comprise a specified ferrite, and have an average primary particle diameter which is larger than the maximum of the average primary particle diameters of the respective plurality of kinds of external additives 3a and which is 0.2 μm or more and 2.0 μm or less.

Abstract translation: 要解决的问题：提供一种能够长时间地从外部添加其外部添加剂的外部添加剂稳定地向调色剂充电的树脂涂布载体，并提供双组分显影剂。 解决方案：树脂涂布载体2与调色剂3一起使用，其中外部添加了具有不同平均一次粒径的多种外部添加剂3a，其中多种外部添加剂中的至少一种 各种外部添加剂3a的平均一次粒径为50nm以上。 载体包括载体芯材2a和形成在载体芯材2a的表面上的树脂涂层2b。 树脂涂层2b包括涂覆树脂和带电辅助微粒2c。 充电助剂微粒2c在树脂被覆层2b中形成突起2d，包含规定的铁素体，平均一次粒径大于各种外部添加剂3a的平均一次粒径的最大值 并且为0.2μm以上且2.0μm以下。 版权所有（C）2012，JPO＆INPIT