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    • 28. 发明授权
    • Negatively chargeable toner with specified fine particles added
externally
    • 带负电荷的带有特殊细颗粒的调色剂
    • US5776646A
    • 1998-07-07
    • US879330
    • 1997-06-20
    • Masayuki HagiTakeshi AraiJunichi TamaokiHiroyuki Fukuda
    • Masayuki HagiTakeshi AraiJunichi TamaokiHiroyuki Fukuda
    • G03G9/097G03G9/107
    • G03G9/097G03G9/09708
    • The invention relates to: (1) negatively chargeable toner particles with inorganic fine particles externally added thereto, the inorganic fine particles having a specified number-mean particle size and a specified chargeability, and (2) toner particles with silica fine particles and titania fine particles added to the toner particles in specified quantities and respectively having a specified number-mean particle size and a specified degree of hydrophobicity and, in combination therewith, inorganic particles having a specified number-mean particle size added to the toner particles. The toner of the present invention has good environmental stability, non-sticking characteristic, and good storage stability, and is capable of forming good images without aggregation noise and free of fogging after repetition of copy. The toner is suitable for full-color image formation in particular.
    • 本发明涉及:(1)具有外部添加的无机细颗粒的带负电荷的调色剂颗粒,所述无机细颗粒具有指定的数均粒径和指定的带电性,和(2)具有二氧化硅细颗粒和二氧化钛的调色剂颗粒 颗粒以规定的量添加到调色剂颗粒中,并且分别具有指定的数均粒径和特定的疏水度,并且与其组合,添加到调色剂颗粒中的具有指定数均粒径的无机颗粒。 本发明的调色剂具有良好的环境稳定性,不粘特性和良好的储存稳定性,能够在没有聚集噪声的情况下形成良好的图像,并且在重复复制之后不会起雾。 该调色剂特别适用于全色图像形成。