公开(公告)号：US6033817A

公开(公告)日：2000-03-07

申请号：US902320

申请日：1997-07-29

申请人： Hiroshi Yusa ,  Motoo Urawa ,  Keita Nozawa ,  Yuki Karaki ,  Kazuo Maruyama

发明人： Hiroshi Yusa ,  Motoo Urawa ,  Keita Nozawa ,  Yuki Karaki ,  Kazuo Maruyama

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

CPC分类号： G03G9/0819 ,  G03G9/0821 ,  G03G9/0827

摘要： A toner for developing an electrostatic image is disclosed which has at least one endothermic peak in the temperature region of 120.degree. C. or below in differential thermal analysis and contains, in its particles having particle diameters of 3 .mu.m or larger, not less than 93% by number of particles having a circularity of at least 0.90 and less than 30% by number of particles having a circularity of at least 0.98. The toner does not cause the re-transfer under high transfer current conditions and can realize the formation of good images with high image density. Also, an image forming method using the toner is disclosed.

摘要翻译： 公开了一种用于显影静电图像的调色剂，其在差示热分析中在120℃或更低的温度区域中具有至少一个吸热峰，并且在其粒径为3μm或更大的颗粒中不少于 93个数量的圆形度为至少0.90且小于30％的颗粒的圆形度为至少0.98的颗粒。 调色剂在高转印电流条件下不会导致再转印，并能实现高图像浓度的良好图像的形成。 此外，公开了使用调色剂的图像形成方法。

公开(公告)号：US5840457A

公开(公告)日：1998-11-24

申请号：US902945

申请日：1997-07-30

申请人： Motoo Urawa ,  Keita Nozawa ,  Hiroshi Yusa ,  Takashige Kasuya ,  Yuki Karaki ,  Kazuo Maruyama ,  Masao Takano

发明人： Motoo Urawa ,  Keita Nozawa ,  Hiroshi Yusa ,  Takashige Kasuya ,  Yuki Karaki ,  Kazuo Maruyama ,  Masao Takano

IPC分类号： G03G9/08 ,  G03G9/083 ,  G03G9/087 ,  G03G9/09 ,  G03G13/20 ,  G03G15/01 ,  G03G15/20 ,  G03G13/01

CPC分类号： G03G9/0904 ,  G03G13/20 ,  G03G9/0825 ,  G03G9/083 ,  G03G9/08782 ,  G03G9/08795 ,  G03G2215/0174

摘要： A magnetic black toner for electrophotography, includes: (a) magnetic black toner particles containing a binder resin, a magnetic material in 30-200 wt. parts per 100 wt. parts of the binder resin, and a first solid wax, and (b) first inorganic fine powder. The first solid wax (ii) provides a DSC heat-absorption main peak in a range of 60.degree.-120.degree. C., and (iii) shows a molecular weight distribution factor Mw/Mn of 1.0-2.0. The binder resin (iv) has a THF (tetrahydrofuran)-insoluble content of at most 5 wt. %, and (v) contains a THF-soluble content showing a GPC molecular weight distribution including a content (M1) of 40-70% in molecular weights of below 5.times.10.sup.4, a content (M2.ltoreq.M1) of 20-45% in molecular weights of 5.times.10.sup.4 -5.times.10.sup.5, and a content (M3

摘要翻译： 用于电子照相术的磁性黑色调色剂包括：（a）含有粘合剂树脂的磁性黑色调色剂颗粒，30-200重量份的磁性材料。 每100重量份 部分粘合剂树脂和第一固体蜡，和（b）第一无机细粉末。 第一固体蜡（ⅱ）在60〜120℃的范围内提供DSC吸热主峰，（iii）分子量分布因子Mw / Mn为1.0-2.0。 粘合剂树脂（iv）具有至多5重量％的THF（四氢呋喃） - 不溶性含量。 ％，（v）含有可溶于THF的含量，其含有分子量低于5×10 4的含量（M1）为40-70％的GPC分子量分布，含量（M2≤M1）为20-45％ 分子量为5×104-5×105，分子量超过5×10 5的含量（M3

公开(公告)号：US5912101A

公开(公告)日：1999-06-15

申请号：US55317

申请日：1998-04-06

申请人： Yuki Karaki ,  Hiroshi Yusa ,  Takashige Kasuya ,  Kazuo Maruyama ,  Masao Takano

发明人： Yuki Karaki ,  Hiroshi Yusa ,  Takashige Kasuya ,  Kazuo Maruyama ,  Masao Takano

IPC分类号： G03G9/08 ,  G03G9/087 ,  G03G9/097 ,  G03G13/22

CPC分类号： G03G9/08782 ,  G03G9/0819 ,  G03G9/0827 ,  G03G9/08795 ,  G03G9/08704 ,  G03G9/09725

摘要： A toner for forming an image has toner particles containing at least a colorant, a binder resin and a wax. The toner has (i) a circularity distribution in which the toner has an average circularity of 0.900 to less than 0.965, contains 20 to 60% by number of particles with a circularity of less than 0.95 and has a mode circularity of 0.90 or more; and (ii) a particle size distribution in which the toner has a circle-equivalent average diameter of 2.0 to 10.0 .mu.m and has at least one peak of frequency by number in the region of a circle-equivalent diameter of 0.6 to 3.0 .mu.m and at least one peak of frequency by number in the region of a circle-equivalent diameter of from more than 3.0 .mu.m to 10.0 .mu.m. The wax has an endothermic main peak as measured by DSC of 60 to 120.degree. C. The binder resin contains THF soluble matter and 0 to 5.0% by weight of THF insoluble matter. The THF soluble matter having a molecular-weight distribution as measured by GPC in which the THF soluble matter has a content (M1) of 5% or less of a component with a molecular weight of less than 50,000, a content (M2) of 20 to 45% of a component with a molecular weight of 50,000 to 500,000, and a content (M3) of 2 to 25% of a component with a molecular weight exceeding 500,000 and the following condition (1) is satisfied:M1.gtoreq.M2>M3 (1)

摘要翻译： 用于形成图像的调色剂具有至少含有着色剂，粘合剂树脂和蜡的调色剂颗粒。 调色剂具有（i）其中调色剂的平均圆形度为0.900至小于0.965的圆形度分布，包含20至60个数量的圆形度小于0.95的颗粒，并且具有0.90以上的模式圆形度; 和（ii）调色剂的圆当量平均直径为2.0〜10.0μm的粒径分布，并且在圆当量直径为0.6〜3.0μm的区域中具有至少一个频数峰值 并且在圆当量直径为3.0μm以上10.0μm以上的区域中，至少存在一个数量以上的峰。 蜡具有通过DSC测量的吸热主峰为60至120℃。粘合剂树脂含有THF可溶物质和0至5.0重量％的THF不溶物质。 通过GPC测定的THF可溶物质，其中THF可溶物质的分子量小于50,000的成分的含量（M1）为5％以下，含量（M2）为20 至45％的分子量为50,000至500,000的组分，并且分子量超过500,000的组分的含量（M3）为2至25％，满足以下条件（1）：M1> = M2 > M3（1）

公开(公告)号：US06214509B1

公开(公告)日：2001-04-10

申请号：US09310949

申请日：1999-05-13

申请人： Takashige Kasuya ,  Tsutomu Kukimoto ,  Satoshi Yoshida ,  Hiroshi Yusa ,  Manabu Ohno ,  Tsuyoshi Takiguchi ,  Yuki Karaki ,  Satoshi Handa ,  Masanori Ito

发明人： Takashige Kasuya ,  Tsutomu Kukimoto ,  Satoshi Yoshida ,  Hiroshi Yusa ,  Manabu Ohno ,  Tsuyoshi Takiguchi ,  Yuki Karaki ,  Satoshi Handa ,  Masanori Ito

IPC分类号： G03G9097

CPC分类号： G03G9/09708 ,  G03G9/0819 ,  G03G9/09716

摘要： The objects of the present invention are to provide a toner excellent in transferability, little remaining on the photosensitive member and causing no defective image in roll-aided transfer (or at least such a phenomenon is well-controlled), and also to provide an image forming method using the same toner. The above objects are achieved when the toner contains a binder resin and colorant, inorganic fine particles, and a hydrotalcite compound shown by the formula: M1y12+M2y22+ . . . Mjyj2+L1x13+L2x23+ . . . Lkxk3+(OH)2.(X/n)An−.mH2O  (1) wherein 0

摘要翻译： 本发明的目的是提供一种转印性优异，在光敏元件上几乎没有残留的调色剂，并且不会在辊辅助转印中产生不良图像（或至少这种现象被良好控制），并且还提供图像 当调色剂含有粘合剂树脂和着色剂，无机细颗粒和下式所示的水滑石化合物时，实现了上述目的：其中0 <[X =（x1 + x2 + ... xk） ] <= 0.5; Y =（y1 + y2 + ... + yj）= 1-X; j和k分别为2以上的整数， M13 +，M23 +，。 。 。 和Mj2 +是彼此不同的二价金属离子; L13 +，L23 +。 。 。 并且Lk3 +是彼此不同的三价金属离子; An-是n价阴离子; 并且m> = 0），并且当使用上述调色剂的图像形成方法包括对图像载体进行充电的充电步骤; 在所述带电图像载体上形成静电潜像的潜像形成步骤; 显影步骤，用由调色剂载体承载的调色剂显影静电潜像，以在图像载体上形成调色剂图像; 转印步骤，其通过或不通过中间介质将图像载体上的调色剂图像转印到介质上; 以及将调色剂图像固定在介质上的固定步骤。

公开(公告)号：US06485875B1

公开(公告)日：2002-11-26

申请号：US09696296

申请日：2000-10-26

申请人： Yuki Karaki ,  Hiroshi Yusa ,  Takashige Kasuya ,  Yoshihiro Ogawa

发明人： Yuki Karaki ,  Hiroshi Yusa ,  Takashige Kasuya ,  Yoshihiro Ogawa

IPC分类号： G03G9087

CPC分类号： G03G9/08702 ,  G03G9/087 ,  G03G9/08755 ,  G03G9/08795

摘要： A toner is constituted by at least a binder resin, a colorant and a wax. The binder resin has been formed from monomers including a vinyl monomer and polyester-forming monomers containing at least a polybasic carboxylic acid having three or more carboxyl groups or its anhydride, and comprises at least a hybrid resin comprising a vinyl polymer unit and a polyester unit.

摘要翻译： 调色剂由至少粘合剂树脂，着色剂和蜡构成。 粘合剂树脂由包括乙烯基单体和至少含有三个或更多个羧基的多元羧酸或其酸酐的聚酯形成单体的单体形成，并且至少包括含有乙烯基聚合物单元和聚酯单元的混合树脂 。

公开(公告)号：US06300024B1

公开(公告)日：2001-10-09

申请号：US09605755

申请日：2000-06-28

申请人： Hiroshi Yusa ,  Satoshi Yoshida ,  Takashige Kasuya ,  Yuki Karaki

发明人： Hiroshi Yusa ,  Satoshi Yoshida ,  Takashige Kasuya ,  Yuki Karaki

IPC分类号： G03G1301

CPC分类号： G03G9/087

摘要： A toner is principally constituted by a binder resin, a colorant and a wax. The toner has a maximum heat-absorption peak of 60-135° C. as measured by differential scanning calorimetry (DSC). The toner further has a viscoelastic characteristic measured at an angular frequency of the toner of 6.28 rad/sec including: a temperature giving a loss molecules G″ of 3×104 Pa of 90-115° C., a temperature giving a loss modulus G″ of 2×104 Pa of 95-120° C., a temperature giving a loss modulus G″ of 1×104 Pa of 105-135° C., a tan &dgr; (loss modulus G″/storage modulus G′) when G″=1×104-3×104 Pa of 0.6-2.0, a storage modulus at 170° C. (G′ (170° C.)) of 1×102-1×104 Pa, a loss modulus at 170° C. (G″ (170° C.)) of 1×102-1×104 Pa, and a ratio of a tan &dgr; at 170° C. (tan &dgr;170) to a tan &dgr; at 150° C. (tan &dgr;150) (tan &dgr;170/tan &dgr;150) of 1.05-1.6. The toner contains a tetrahydrofuran (THF)-soluble content exhibiting a molecular weight distribution according to gel permeation chromatography (GPC) chromatogram providing a main peak in a molecular weight region of 2,000-30,000 and a ratio (Mw/Mn) of above 100 between weight-average molecular weight (Mw) and number-average molecular weight (Mn). The resultant toner is effective in improving a low-temperature fixability and a high-temperature anti-offset characteristic while retaining an appropriate gloss of a fixed image in a broader temperature range.

摘要翻译： 调色剂主要由粘合剂树脂，着色剂和蜡构成。 通过差示扫描量热法（DSC）测量，调色剂具有60-135℃的最大吸热峰。 调色剂还具有在6.28rad / sec的调色剂的角频率下测量的粘弹特性，包括：具有90-115℃的3×104Pa的损失分子G“的温度，给出损耗模量G' '的2×104Pa的95-120℃，给出1×104Pa的损耗模量G“为105-135℃的温度，当G'为1时，tanδ（损耗模量G”/储能模量G'）， '= 1×104-3×104Pa为0.6-2.0，在170℃下的储能模量（G'（170℃））为1×102-1×104Pa，在170℃的损耗模量（G“（170° （tanδ150）（tanδ150）（tanδ170/tanδ150）为1.05-1.6（tanδ150）（tanδ150）（tanδ150/tanδ150） 。 调色剂含有根据凝胶渗透色谱（GPC）色谱分子量分布的四氢呋喃（THF） - 可溶物含量，其分子量区域为2,000-3,000，主峰分别为 重均分子量（Mw）和数均分子量（Mn）。 所得到的调色剂在保持在更宽的温度范围内的固定图像的适当光泽度的同时有效地提高了低温定影性和高温抗污损特性。

公开(公告)号：US20060177753A1

公开(公告)日：2006-08-10

申请号：US11378349

申请日：2006-03-20

申请人： Syuhei Moribe ,  Hiroshi Yusa ,  Takashige Kasuya ,  Yoshihiro Ogawa

发明人： Syuhei Moribe ,  Hiroshi Yusa ,  Takashige Kasuya ,  Yoshihiro Ogawa

IPC分类号： G03G9/08

CPC分类号： G03G9/09725 ,  G03G5/04 ,  G03G5/0436 ,  G03G5/0514 ,  G03G9/0821 ,  G03G9/083 ,  G03G9/0835 ,  G03G9/08755 ,  G03G9/08782 ,  G03G9/08793 ,  G03G9/08795 ,  G03G9/08797 ,  G03G9/09708 ,  G03G9/09716 ,  G03G9/09783

摘要： A toner of the present invention comprises at least a binder resin comprising as a main component a polyester resin, a wax, and a colorant, in which in case of measuring a wettability of the toner with respect to a mixed solvent of methanol and water in terms of an optical transimittance at an optical wavelength of 780 nm, a methanol concentration of the mixed solvent is in a range of 45 to 65% by volume when an optical transmittance is 80% and 10%, respectively; a melt index (MI) is of 0.1 to 10 g/lO min at a temperature of 125° C. and a load of 5 kg; the toner comparises a resin component insoluble to tetrahydrofuran (THF insoluble component) in an amount of 5 to 40% by mass based on a mass of the binder resin; and the toner comprises a THF soluble component having a main peak in a molecular weight region of 3,000 to 20,000, and has a proportion of a component having a molecular weight of 10,000 or less in the THF soluble component is 50% by mass or more, according to a chromatogram of the THF soluble component measured by gel permeation chromatography. According to the toner of the present invention, it is possible to control lowering of an image density after leaving under a high temperature and high humidity environment, and a decline in the image density due to a charge-rise phenomenon upon low rate printing. Further, the toner has excellent fixing property and high temperature offset characteristic, and occurring of the end-offset is controlled.

摘要翻译： 本发明的调色剂至少包含粘合剂树脂，其包含作为主要成分的聚酯树脂，蜡和着色剂，其中在测量调色剂相对于甲醇和水的混合溶剂的润湿性的情况下 当光学透射率为80％和10％时，光波长为780nm时的混合溶剂的甲醇浓度为45〜65体积％。 熔体指数（MI）在125℃的温度和5kg的负荷下为0.1至10g / 10分钟; 相对于粘合剂树脂的质量，该调色剂比较不溶于四氢呋喃的THF树脂成分（THF不溶成分）的量为5〜40质量％ 调色剂包含分子量为3000〜20,000的主峰的THF可溶成分，THF可溶成分中的分子量为10,000以下的成分的比例为50质量％以上， 根据通过凝胶渗透色谱测量的THF可溶性组分的色谱图。 根据本发明的调色剂，可以控制在高温和高湿度环境下离开之后的图像浓度的降低，以及在低速打印时由于充电 - 上升现象引起的图像浓度的下降。 此外，调色剂具有优异的定影性和高温偏移特性，并且控制了端部偏移的发生。

公开(公告)号：US20060035163A1

公开(公告)日：2006-02-16

申请号：US11212638

申请日：2005-08-29

申请人： Syuhei Moribe ,  Hiroshi Yusa ,  Takashige Kasuya ,  Yoshihiro Ogawa

发明人： Syuhei Moribe ,  Hiroshi Yusa ,  Takashige Kasuya ,  Yoshihiro Ogawa

IPC分类号： G03G9/08

CPC分类号： G03G9/09725 ,  G03G5/04 ,  G03G5/0436 ,  G03G5/0514 ,  G03G9/0821 ,  G03G9/083 ,  G03G9/0835 ,  G03G9/08755 ,  G03G9/08782 ,  G03G9/08793 ,  G03G9/08795 ,  G03G9/08797 ,  G03G9/09708 ,  G03G9/09716 ,  G03G9/09783

摘要： A toner of the present invention comprises at least a binder resin comprising as a main component a polyester resin, a wax, and a colorant, in which in case of measuring a wettability of the toner with respect to a mixed solvent of methanol and water in terms of an optical transimittance at an optical wavelength of 780 nm, a methanol concentration of the mixed solvent is in a range of 45 to 65% by volume when an optical transmittance is 80% and 10%, respectively; a melt index (MI) is of 0.1 to 10 g/10 min at a temperature of 125° C. and a load of 5 kg; the toner comparises a resin component insoluble to tetrahydrofuran (THF insoluble component) in an amount of 5 to 40% by mass based on a mass of the binder resin; and the toner comprises a THF soluble component having a main peak in a molecular weight region of 3,000 to 20,000, and has a proportion of a component having a molecular weight of 10,000 or less in the THF soluble component is 50% by mass or more, according to a chromatogram of the THF soluble component measured by gel permeation chromatography. According to the toner of the present invention, it is possible to control lowering of an image density after leaving under a high temperature and high humidity environment, and a decline in the image density due to a charge-rise phenomenon upon low rate printing. Further, the toner has excellent fixing property and high temperature offset characteristic, and occurring of the end-offset is controlled.

公开(公告)号：US5262267A

公开(公告)日：1993-11-16

申请号：US848659

申请日：1992-03-09

申请人： Tsuyoshi Takiguchi ,  Tetsuya Kuribayashi ,  Koichi Tomiyama ,  Tsutomu Kukimoto ,  Hiroshi Yusa ,  Eiichi Imai

发明人： Tsuyoshi Takiguchi ,  Tetsuya Kuribayashi ,  Koichi Tomiyama ,  Tsutomu Kukimoto ,  Hiroshi Yusa ,  Eiichi Imai

IPC分类号： G03G9/08 ,  G03G9/083 ,  G03G9/097 ,  G03G13/09 ,  G03G13/06

CPC分类号： G03G13/09 ,  G03G9/0819 ,  G03G9/0821 ,  G03G9/0823 ,  G03G9/0837 ,  G03G9/0838 ,  G03G9/097

摘要： A magnetic developer for developing an electrostatic latent image, including hydrophobic silica fine powder and an insulating magnetic toner comprising at least a binder resin and a magnetic material comprising spherical magnetic particles; wherein 0.16 to 1.6 wt. parts of the hydrophobic silica fine powder is mixed with 100 wt. parts of the insulating magnetic toner; the developer contains 17-60% by number of magnetic toner particles having a particle size of 5 microns or smaller, 5-50% by number of magnetic toner particles having a particle size of 6.35-10.08 microns, and 2.0% by volume or less of magnetic toner particles having a particle size of 12.7 microns or larger.

摘要翻译： 一种用于显影静电潜像的磁性显影剂，包括疏水性二氧化硅细粉末和至少包含粘合剂树脂和包含球形磁性颗粒的磁性材料的绝缘磁性调色剂; 其中0.16至1.6wt。 将疏水性二氧化硅细粉末的一部分与100重量％ 部分绝缘磁性调色剂; 显影剂含有17-60个数量的粒径为5微米或更小的磁性调色剂颗粒，5-50个数量的粒径为6.35-10.08微米的磁性调色剂颗粒和2.0体积％以下的 的粒径为12.7微米或更大的磁性调色剂颗粒。

公开(公告)号：US5215845A

公开(公告)日：1993-06-01

申请号：US779808

申请日：1991-10-21

申请人： Hiroshi Yusa ,  Kohichi Tomiyama ,  Masayoshi Kato ,  Tsutomu Kukimoto ,  Kiyoko Tsuchiya

发明人： Hiroshi Yusa ,  Kohichi Tomiyama ,  Masayoshi Kato ,  Tsutomu Kukimoto ,  Kiyoko Tsuchiya

IPC分类号： G03G9/08 ,  G03G9/083 ,  G03G13/09 ,  G03G13/26 ,  G03G15/08 ,  G03G15/09

CPC分类号： G03G9/0823 ,  G03G13/09 ,  G03G15/0928 ,  G03G9/0819 ,  G03G9/0821

摘要： An electrostatic image supporting member which supports an electrostatic image and a toner carrying member for conveying a magnetic toner are disposed in a development section with a specified gap therebetween. The toner carrying member has a base whose surface has an average surface roughness (Ra) of 1.0 to 3.0 .mu.m. A resin coating containing electrically conductive fine particles is formed on the base surface at a density of 4 to 12 g per 1 m.sup.2. The outer layer of the coating has an Ra from 0.8 to 3.0 .mu.m. The toner carrying member carries an electrically insulating magnetic toner containing at least a binder resin and a magnetic component, and satisfying the conditions of a volumetric average particle size of 4.5 to 8 .mu.m, a BET specific surface area of 1.8 to 3.5 m.sup.2 /g, a charge amount of -20 to -35 .mu.c/g, a loose-state apparent density of 0.40 to 0.52 g/cm.sup.3, and a true specific gravity of 1.45 to 1.8. The magnetic toner is formed into a layer having a thickness smaller than the dimension of the gap by a member for regulating the thickness by pressing the toner against the toner carrying member. The magnetic toner is then conveyed to the development section, in which the toner develops the electrostatic image while an AC electric field is applied.

摘要翻译： 支撑静电图像的静电图像支撑构件和用于输送磁性调色剂的调色剂承载构件以其间具有特定间隙的方式设置在显影区域中。 调色剂承载构件具有表面的平均表面粗糙度（Ra）为1.0〜3.0μm的基材。 含有导电性微粒的树脂被膜以4〜12g / 1m 2的密度形成在基材表面上。 涂层的外层的Ra为0.8〜3.0μm。 调色剂承载构件承载至少含有粘合剂树脂和磁性组分的电绝缘磁性调色剂，并且满足体积平均粒径为4.5至8μm的条件，BET比表面积为1.8至3.5m 2 / g ，电荷量为-20〜-35μC/ g，松散状态表观密度为0.40〜0.52g / cm 3，真比重为1.45〜1.8。 磁性调色剂通过将调色剂压靠在调色剂承载部件上而调节厚度的部件形成为厚度小于间隙尺寸的层。 然后将磁性调色剂输送到显影部分，其中调色剂在施加AC电场时显影静电图像。