公开(公告)号：US06432599B1

公开(公告)日：2002-08-13

申请号：US09976884

申请日：2001-10-12

申请人： Yasuhito Yuasa ,  Noriaki Hirota ,  Masahisa Maeda

发明人： Yasuhito Yuasa ,  Noriaki Hirota ,  Masahisa Maeda

IPC分类号： G03G9097

CPC分类号： G03G9/08782 ,  G03G9/08755 ,  G03G9/08795 ,  G03G9/09716 ,  G03G9/09725

摘要： The present invention provides a toner comprising a binding resin, a colorant, and an ester based wax having an iodine value of not more than 25 and a saponification value of 30 to 300 (for example, at least one selected from the group consisting of meadowfoam oil and derivatives thereof and jojoba oil and derivatives thereof) and a method for producing the same. The present invention also provides a toner comprising silica fine powder containing a component having a polydimethyl siloxane skeleton extracted by an organic solvent at a content of not more than 2.5 wt %, and a method for producing the same. This stabilizes the chargeability and flowability of the toner during long period use, and reduces the filming on a photoconductive member or a transfer medium, Moreover, toner that provides good fixability, anti-offset properties, waste toner recycle properties, and transfer efficiency can be obtained with good reproducibility.

摘要翻译： 本发明提供一种调色剂，其包含粘合树脂，着色剂和碘值不大于25且皂化值为30至300的酯基蜡（例如，选自由白发泡沫组成的组中的至少一种 油及其衍生物和霍霍巴油及其衍生物）及其制造方法。 本发明还提供一种包含二氧化硅细粉末的调色剂及其制备方法，该二氧化硅细粉末含有由有机溶剂以不超过2.5重量％的含量提取的聚二甲基硅氧烷骨架的成分。 这使得长时间使用期间调色剂的带电性和流动性稳定，并且降低了感光体或转印介质上的成膜。此外，提供良好定影性，抗偏移性，废调色剂再循环性和转印效率的调色剂可以是 获得具有良好的重现性。

公开(公告)号：US06579653B1

公开(公告)日：2003-06-17

申请号：US09914614

申请日：2001-09-14

申请人： Yasuhito Yuasa ,  Noriaki Hirota ,  Masahisa Maeda

发明人： Yasuhito Yuasa ,  Noriaki Hirota ,  Masahisa Maeda

IPC分类号： G03G9087

CPC分类号： G03G9/081 ,  G03G9/0819 ,  G03G9/0821 ,  G03G9/0833 ,  G03G9/0834 ,  G03G9/0835 ,  G03G9/0836 ,  G03G9/0838 ,  G03G9/08704 ,  G03G9/08728 ,  G03G9/08755 ,  G03G9/08782 ,  G03G9/08786 ,  G03G9/08793 ,  G03G9/08795 ,  G03G9/08797 ,  G03G9/09716 ,  G03G9/09725

摘要： In an electrophotographic apparatus, which forms a color image by transferring a plurality of toner images having different colors onto an image-receiving sheet so as to be stacked and fixed thereon, even in the case of carrying out an oil-less fixing process and allowing the process speed to vary within wide range, the present invention provides a binder resin, toner and an electrophotographic apparatus which make it possible to achieve both superior fixing property and anti-offset property, and consequently to form a color image with high color reproducibility and high quality. In the present invention, a toner comprising a molecular weight maximum peak in a range of molecular weights from 2×103 to 3×104 in molecular weight distribution of GPC chromatogram, and a molecular weight maximum peak or shoulder in a range from 3×104 to 1×106, wherein said molecular weight maximum peak or shoulder located on a range of molecular weights from 3×104 to 1×106 is obtained by kneading a toner composition containing a specific binder resin containing a high molecular weight component at not less than a specific amount so that the high molecular weight component of the binder is converted into a low molecular weight component by thermal or mechanical energy exerted at the time of kneading, is provided.

摘要翻译： 在通过将具有不同颜色的多个调色剂图像转印到图像接收片材上以便堆叠和固定在其上而形成彩色图像的电子照相设备中，即使在进行无油定影处理并允许 工艺速度在宽范围内变化，本发明提供了一种粘合剂树脂，调色剂和电子照相设备，其可以实现优异的定影性和抗偏移性，从而形成具有高色彩再现性的彩色图像， 高质量。 在本发明中，在GPC色谱图的分子量分布中分子量为2×103〜3×10 4的范围内的分子量最大峰和3×10 4〜1×10 6范围内的分子量最大峰或肩峰的调色剂，其中所述分子 通过将包含高分子量成分的特定粘合剂树脂的调色剂组合物以不低于特定量的方式捏合，使得分子量为3×10 4〜1×10 6的重均分子量的重量最大峰或肩 提供粘合剂通过在捏合时施加的热或机械能转化成低分子量组分。

公开(公告)号：US06270937B1

公开(公告)日：2001-08-07

申请号：US09754161

申请日：2001-01-04

申请人： Yasuhito Yuasa ,  Noriaki Hirota ,  Masahisa Maeda

发明人： Yasuhito Yuasa ,  Noriaki Hirota ,  Masahisa Maeda

IPC分类号： G03G908

摘要： The present invention provides a toner comprising a binding resin, a colorant, and an ester based wax having an iodine value of not more than 25 and a saponification value of 30 to 300 (for example, at least one selected from the group consisting of meadowfoam oil and derivatives thereof and jojoba oil and derivatives thereof) and a method for producing the same. The present invention also provides a toner comprising silica fine powder containing a component having a polydimethyl siloxane skeleton extracted by an organic solvent at a content of not more than 2.5 wt %, and a method for producing the same. This stabilizes the chargeability and flowability of the toner during long period use, and eliminates the filming on a photoconductive member or a transfer medium, Moreover, toner that provides good fixability, anti-offset properties, waste toner recycle properties, and transfer efficiency can be obtained with good reproducibility.