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    • 9. 发明专利
    • Toner and method for producing the same, and two-component developer
    • 用于生产它们的调色剂及其方法和两组分开发商
    • JP2013101334A
    • 2013-05-23
    • JP2012230661
    • 2012-10-18
    • Canon Incキヤノン株式会社
    • HAGIWARA EMIKONO YASUNORIINOUE RYOISHIDA SHINTAROUSAMI HIROICHIHARAGUCHI MANAMIMIYAZAWA TOMOAKI
    • G03G9/08G03G9/087G03G9/097G03G9/10
    • B82Y30/00G03G9/0825G03G9/097G03G9/09716G03G9/09725
    • PROBLEM TO BE SOLVED: To provide toner having stable charging characteristics for a long period of time.SOLUTION: The toner comprises toner base particles 1 and an external additive. On the surface of the toner base particle, regions having different polarities of triboelectric charges with respect to magnetic particles are present in a sea-island state. When a sea region 2 and an island region 3 are denoted by a region A and a region B, respectively, the region B has a predetermined height. The external additive has a reverse polarity to the region B in terms of the polarity of triboelectric charges with respect to the magnetic particles. The external additive contains a first external additive 4 having a number average primary particle diameter of 80 nm or more and 150 nm or less, and a second external additive 5 having a number average primary particle diameter of 10 nm or more and 60 nm or less. The average coverage of the first external additive in the region B is 27% or more and less than 100%, and the average coverage of the first external additive in the region A is 12% or less.
    • 要解决的问题:长时间提供具有稳定充电特性的调色剂。 调色剂包括调色剂基础颗粒1和外部添加剂。 在调色剂基础颗粒的表面上,具有相对于磁性颗粒的摩擦电荷极性不同的区域以海岛状态存在。 当海域2和岛区域3分别由区域A和区域B表示时,区域B具有预定的高度。 外部添加剂相对于磁性粒子的摩擦电荷极性与区域B具有相反的极性。 外部添加剂含有数均一次粒径为80nm以上且150nm以下的第一外部添加剂4和数均一次粒径为10nm以上且60nm以下的第二外部添加剂5 。 区域B中第一外用添加剂的平均覆盖率为27%以上且小于100%,区域A中的第一外用添加剂的平均覆盖率为12%以下。 版权所有(C)2013,JPO&INPIT
    • 10. 发明专利
    • Image forming apparatus and toner for electrostatic charge image development
    • 图像形成装置和调色剂用于静电电荷图像开发
    • JP2012083712A
    • 2012-04-26
    • JP2011171810
    • 2011-08-05
    • Ricoh Co Ltd株式会社リコー
    • KOJIMA TOMOYUKISATO SACHIKOUCHINOKURA OSAMUOGAWA SATORUAWAMURA JUNICHISUGIMOTO TSUTOMUKUSAHARA TERUKIITO DAISUKEINOUE DAISUKEHOZUMI MAMORUSATO YUKIFUMI
    • G03G9/08G03G9/087
    • G03G9/0819G03G9/0804G03G9/08755G03G9/08795G03G9/08797G03G9/097G03G9/09708G03G9/09716G03G9/09725
    • PROBLEM TO BE SOLVED: To provide a toner containing crystalline polyester and having anti-filming property and anti-spent property to a carrier, having stable low-temperature fixability, high temperature offset resistance and heat-resistant storage property, and to provide an image forming apparatus mounting the toner.SOLUTION: The toner has a volume average particle diameter (Dv) of 4.0 to 6.0 μm, obtained by dispersing an oil phase, which comprises at least one of a crystalline polyester resin and an amorphous polyester resin as a binder resin component included in an organic solvent, into an aqueous medium, and then removing the organic solvent from the obtained dispersion liquid. The toner contains at least two kinds of additives on the surface thereof, in which an additive (A) having the maximum average primary particle diameter in the additives has a coverage CA expressed by formula (A) in the range from 5% to 10%, and an additive (B) having the minimum average primary particle diameter in the additives has a coverage CB expressed by formula (B) in the range from 45% to 100%.
    • 要解决的问题:为了提供含有结晶聚酯的调色剂,并且具有抗载体性和抗废弃性能,具有稳定的低温定影性,耐高温粘合性和耐热保存性,并且 提供安装调色剂的图像形成装置。 解决方案:调色剂的体积平均粒径(Dv)为4.0至6.0μm,通过分散包含结晶聚酯树脂和非晶形聚酯树脂中的至少一种的油相获得,其包含作为粘合剂树脂组分 在有机溶剂中进入水性介质,然后从得到的分散液中除去有机溶剂。 调色剂在其表面上含有至少两种添加剂,其中添加剂中具有最大平均一次粒径的添加剂(A)具有由式(A)表示的覆盖率为5%至10%的范围, ,并且添加剂中具有最小平均一次粒径的添加剂(B)具有由式(B)表示的覆盖率CB在45%至100%的范围内。 版权所有(C)2012,JPO&INPIT