公开(公告)号：JP2006113362A

公开(公告)日：2006-04-27

申请号：JP2004301470

申请日：2004-10-15

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： KIKAWA KEIICHI ,  SHIBAI YASUHIRO ,  TSUBAKI YORIHISA

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

Abstract: PROBLEM TO BE SOLVED: To provide a toner for electrostatic image development having excellent charge stability independently of colorant concentration by properly regulating value for electric conductivity obtained in consideration of not only the surfaces of toner particles but the interiors.
SOLUTION: The toner for electrostatic image development contains at least a binder resin and a colorant, wherein the colorant has been refined with a refining apparatus 1, e.g., using a hydrophilic fluid and a supercritical fluid. An electric conductivity St (μS/cm) of a toner extract and a concentration C (wt.%) of the colorant contained in the toner satisfy expression: St

Abstract translation: 要解决的问题：通过适当地调节不仅考虑了调色剂颗粒的表面，而是考虑到内部电导率的电导率，提供了一种独立于着色剂浓度的具有优异的电荷稳定性的静电图像显影用调色剂。 用于静电图像显影的调色剂至少含有粘合剂树脂和着色剂，其中着色剂已经用精制装置1，例如使用亲水性流体和超临界流体进行精制。 调色剂提取物的电导率St（μS/ cm）和调色剂中包含的着色剂的浓度C（wt。％）满足表达式：St <-2C + 80（其中5≤C≤15），其中调色剂 通过将能够溶解或溶胀粘合剂树脂的有机溶剂与调色剂混合，将调色剂混合有机溶剂与离子交换水混合，并从所得混合溶液中除去有机溶剂，得到提取物。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2005258184A

公开(公告)日：2005-09-22

申请号：JP2004071044

申请日：2004-03-12

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： NAKANO SHINICHI ,  SHIBAI YASUHIRO ,  KIKAWA KEIICHI

IPC: G03G9/08

Abstract: PROBLEM TO BE SOLVED: To provide an electrostatic charge image developing toner which is free of fogging on an image at the time of copying, can prevent filming on a photoreceptor surface, does not give rise to degradation in transfer efficiency and electrostatic chargeability even in long-term use and is high in fixability. SOLUTION: The electrostatic charge image developing toner is prepared by allowing inorganic particulates (d) to exist on the surfaces of parent toner particles formed by adding particulates (c) of 11 to 81 nm in average primary particle size obtained by subjecting the inorganic particulates (c') to a surface treatment by a surface treating agent lower in hardness and/or outflow initiation temperature than that of a binder resin (a) to at least the binder resin (a) and a colorant (b) and mixing the mixture. The inorganic particulates (c') in the particulates (c) are preferably subjected to a hydrophobing treatment by at least one selected from a silane coupling agent, silicone oil and titanate coupling agent prior to the surface treatment. Also, the amount of the inorganic particulates (c') in the particulates (c) is preferably 0.5 to 10 parts by weight per 100 parts by weight the binder resin (a). COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：为了提供在复印时图像上没有起雾的静电荷图像显影调色剂，可以防止感光体表面上的成膜，不会导致转印效率和静电充电性的降低 即使在长期使用和固定性高。 解决方案：通过使无机颗粒（d）存在于通过添加平均一次粒径为11〜81nm的微粒（c）而形成的母体调色剂颗粒的表面上来制备静电荷图像显影调色剂， 无机颗粒（c'）通过与粘合剂树脂（a）的硬度和/或流出引发温度相比低至至少粘合剂树脂（a）和着色剂（b）的表面处理剂的表面处理和混合 混合物。 颗粒（c）中的无机颗粒（c'）优选在表面处理之前通过选自硅烷偶联剂，硅油和钛酸酯偶联剂中的至少一种进行疏水处理。 此外，颗粒（c）中的无机微粒（c'）的量相对于粘合剂树脂（a）每100重量份优选为0.5〜10重量份。 版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JP2005202299A

公开(公告)日：2005-07-28

申请号：JP2004010648

申请日：2004-01-19

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： NAKANO SHINICHI ,  SHIBAI YASUHIRO ,  KIKAWA KEIICHI

IPC: G03G9/08 ,  G03G9/087

Abstract: PROBLEM TO BE SOLVED: To provide an encapsulated toner which is excellent in low temperature fixability, anti-offset properties and blocking resistance, suppresses filming on a developing roller and a photoreceptor, and can stably form clear images many times.
SOLUTION: In the encapsulated electrostatic latent image developing toner consisting essentially of a colorant and a binder resin, a capsule wall contains a powdery material whose heat conductivity at 300 K is Y (W/mK) in an amount of M (vol.%) based on the amount of the capsule wall, and when the thickness of the capsule wall is represented by r (nm), the toner satisfies the expression (1): (r/100)
2

Abstract translation: 要解决的问题：为了提供低温定影性，抗偏移性和抗粘连性优异的封装调色剂，抑制显影辊和感光体上的成膜，并且可以多次稳定地形成清晰的图像。 解决方案：在基本上由着色剂和粘合剂树脂组成的包封的静电潜像显影调色剂中，胶囊壁含有一种粉末状材料，其300K的导热率为Y（W / mK），M（vol 基于胶囊壁的量，当胶囊壁的厚度由r（nm）表示时，调色剂满足式（1）：（r / 100） 2

公开(公告)号：JP2005003883A

公开(公告)日：2005-01-06

申请号：JP2003166544

申请日：2003-06-11

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： NAKANO SHINICHI ,  SHIBAI YASUHIRO ,  KIKAWA KEIICHI

IPC: G03G9/087

Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing a developer having good dispersibility of a pigment and capable of increasing throughput.
SOLUTION: In the method for manufacturing the developer containing at least a binder resin, a pigment, and a pigment surface treating agent, uniform binder resin film formation is attained by carrying out a step of continuously mixing a mixed solvent prepared by dissolving or dispersing the binder resin, pigment, and pigment surface treating agent in an organic solvent with a supercritical or subcritical fluid, and a step of converting the mixed solvent to a lean solvent to the binder resin, pigment, and pigment surface treating agent to precipitate the binder resin on the surface of the pigment treated with the pigment surface treating agent.
COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种制造具有良好的颜料分散性并能提高生产量的显影剂的方法。 解决方案：在制造含有至少粘合剂树脂，颜料和颜料表面处理剂的显影剂的方法中，通过进行将通过溶解制备的混合溶剂连续混合的步骤来获得均匀的粘合剂树脂膜形成 或使用超临界或亚临界流体将粘合剂树脂，颜料和颜料表面处理剂分散在有机溶剂中，以及将混合溶剂转化为贫溶剂至粘合剂树脂，颜料和颜料表面处理剂以沉淀的步骤 在用颜料表面处理剂处理的颜料的表面上的粘合剂树脂。 版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JP2004045654A

公开(公告)日：2004-02-12

申请号：JP2002201771

申请日：2002-07-10

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： SHIBAI YASUHIRO ,  ARIYOSHI SATOSHI ,  AKAZAWA YOSHIAKI ,  HAYASHI TOSHIKA ,  ADACHI KATSUMI ,  NAKANO SHINICHI

IPC: G03G9/09 ,  G03G9/087

Abstract: PROBLEM TO BE SOLVED: To provide small-particle-diameter magenta toner for electrostatic latent image development, which contains a highly dispersed quinacridone pigment and is excellent in transparency and color reproducibility. SOLUTION: The magenta toner for electrostatic latent image developmnet comprises the quinacridone pigment and an acrylic resin containing an itaconic acid, and is produced by a toner production device 1 using a supercritical fluid. The acrylic resin has a comparatively stable structure, and its stereostructure is further stabilized by grafting an alkyl radical having 12 or more carbon atoms. Thus, the adsorption of the quinacridone pigment and acrylic resin is maintained for a long time and the dispersilibity of the quinacridone pigment improves. This makes it possible to provide the magenta toner for electrostatic latent image development, which contains the highly dispersed quinacridone pigment and is excellent in transparency and color reproducibility. COPYRIGHT: (C)2004,JPO

公开(公告)号：JP2004020585A

公开(公告)日：2004-01-22

申请号：JP2002171231

申请日：2002-06-12

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： SHIBAI YASUHIRO ,  ARIYOSHI SATOSHI ,  AKAZAWA YOSHIAKI ,  HAYASHI TOSHIKA

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

Abstract: PROBLEM TO BE SOLVED: To provide a capsular negative charge type toner having a small particle diameter and a high pigment concentration adapted to a toner enhanced in image quality and reduced in consumption, ensuring stable electrostatic charge even at high humidity, including a wax and having a wide anti-offsetting range and good low temperature fixability, and to provide a method for manufacturing the toner. SOLUTION: In the toner comprising at least a bonding resin, a colorant and a wax as essential components, the colorant exists more densely toward the interior and the wax exists more densely toward the surface. The toner is obtained by mixing cationic particles having a sulfonium group with anionic particles in an aqueous medium and carrying out hetero-agglomeration and heat treatment. COPYRIGHT: (C)2004,JPO

公开(公告)号：JP2011257716A

公开(公告)日：2011-12-22

申请号：JP2010134595

申请日：2010-06-11

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： MORI TAKAMICHI ,  UCHIDA HIROHISA ,  SATO TAKESHI ,  NAKATSU KIYOBUMI ,  SUMIDA KATSUAKI ,  SHIBAI YASUHIRO

IPC: G03G9/08 ,  G03G9/087

Abstract: PROBLEM TO BE SOLVED: To provide toner with excellent charge stability and hot-offset resistance even when the content of rosin which is biomass is high.SOLUTION: Toner includes a polyester resin A, a polyester resin B, first wax and second wax. The polyester resin A is obtained by condensation polymerization of aromatic dicarboxylic acid, rosin and a trihydric or more-polyhydric alcohol, in which the content of the rosin in the total amount of starting materials is 60 wt.% or more. The polyester resin B is obtained by condensation polymerization of the aromatic dicarboxylic acid and a polyhydric alcohol and has softening temperature equivalent to that of the polyester resin A or more. The first wax is hydrocarbon system wax having softening temperature equivalent to that of the polyester resin A or more and lower than that of the polyester resin B. The second wax is hydrocarbon system wax having softening temperature equivalent to that of the polyester resin B or more.

Abstract translation: 要解决的问题：即使当生物质的松香含量高时，也能提供具有优异的电荷稳定性和耐热粘合性的调色剂。 解决方案：调色剂包括聚酯树脂A，聚酯树脂B，第一蜡和第二蜡。 通过芳族二羧酸，松香和三元以上的多元醇的缩合得到聚酯树脂A，其中原料总量的松香含量为60重量％以上。 聚酯树脂B是通过芳族二羧酸和多元醇的缩聚得到的，其软化温度等于聚酯树脂A的软化温度。 第一蜡是具有与聚酯树脂A相当的软化温度的烃系蜡，或多于聚酯树脂B的软化温度。第二蜡是具有与聚酯树脂B相同的软化温度的烃系蜡 。 版权所有（C）2012，JPO＆INPIT

公开(公告)号：JP2010286794A

公开(公告)日：2010-12-24

申请号：JP2009142726

申请日：2009-06-15

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： SHIBAI YASUHIRO

IPC: G03G9/087

Abstract: PROBLEM TO BE SOLVED: To provide a toner which excels in durability and has a wide fixable temperature range, and to provide a method for producing the toner. SOLUTION: The toner includes a styrene acrylic resin having a carboxyl group as a functional group, a crystalline resin having a functional group and a colorant. The carboxyl group of the styrene acrylic resin and the functional group of the crystalline resin form a crosslinked structure in the toner. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供耐久性优异并且具有宽固定温度范围的调色剂，并提供调色剂的制造方法。 调色剂包括具有羧基作为官能团的苯乙烯丙烯酸树脂，具有官能团的结晶树脂和着色剂。 苯乙烯丙烯酸树脂的羧基和结晶性树脂的官能团在调色剂中形成交联结构。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2010175752A

公开(公告)日：2010-08-12

申请号：JP2009017369

申请日：2009-01-28

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： MATSUMOTO KATSURU ,  SHIBAI YASUHIRO

IPC: G03G9/087 ,  G03G15/08

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a toner, for obtaining a toner having uniform particle size distribution by uniformly agitating the toner material in aggregation, and to provide a toner, a two-component developer, a developing device and an image forming apparatus. SOLUTION: A dispersion liquid having fine particles dispersed therein is agitated in an aggregation step by using an agitation blade having a plurality of rotor blades and an agitation vessel having a plurality of planar or cylindrical baffle plates on a vessel wall. The agitation blade has: a specified dimension; the agitation blade and the baffle plates are disposed in a specified relation; and the agitation blade is placed at a specified position in the agitation vessel. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：提供一种调色剂的制造方法，用于通过均匀搅拌聚集中的调色剂材料获得具有均匀粒度分布的调色剂，并提供调色剂，双组分显影剂，显影装置 和图像形成装置。 解决方案：通过使用具有多个转子叶片的搅拌叶片和在容器壁上具有多个平面或圆柱形挡板的搅拌容器，在聚集步骤中搅拌其中分散有细颗粒的分散液。 搅拌叶片具有：指定的尺寸; 搅拌叶片和挡板以规定的关系设置; 将搅拌叶片放置在搅拌容器内的指定位置。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2009069308A

公开(公告)日：2009-04-02

申请号：JP2007235872

申请日：2007-09-11

Applicant: Sharp Corp ,  シャープ株式会社

Inventor： HAYASHI TOSHIKA ,  SHIBAI YASUHIRO ,  INO TOSHIAKI ,  YAMAMOTO MASANOBU

IPC: G03G15/02

Abstract: PROBLEM TO BE SOLVED: To provide a charging device capable of preventing an electrode from corroding due to moisture and ozone in the air, preventing charged electric potential on a surface of photosensitive body from becoming nonuniform, and maintaining charged electric potential on the surface of photosensitive body in a proper range for a long period of time. SOLUTION: In this charging device, an electrode forming a protection layer for protecting a surface formed by metal chrome and chromium oxide is used as the electrode arranged in the charging device for charging the surface of photosensitive body. The protection layer has a thin skin layer laminated to cover a surface of the electrode and a diffusion layer formed by diffusing metallic particles in the thin skin layer in the vicinity of an interface between the thin skin layer and the surface of the electrode and forming alloy. COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：为了提供能够防止电极由于空气中的水分和臭氧而腐蚀的充电装置，防止感光体表面上的充电电势变得不均匀，并且保持充电电位在 感光体的表面在适当的范围内长时间。 解决方案：在该充电装置中，使用形成用于保护由金属铬和氧化铬形成的表面的保护层的电极作为布置在用于对感光体的表面充电的充电装置中的电极。 保护层具有层叠以覆盖电极表面的薄表皮层和通过在薄表皮层和电极表面之间的界面附近在薄表皮层中扩散金属颗粒而形成的扩散层，并且形成合金 。 版权所有（C）2009，JPO＆INPIT