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    • 10. 发明授权
    • Carrier for electrophotographic developer
    • 电子照相显影剂载体
    • US06743558B2
    • 2004-06-01
    • US10135377
    • 2002-05-01
    • Kimitoshi YamaguchiMasahide YamashitaAkihiro KotsugaiHiroaki Takahashi
    • Kimitoshi YamaguchiMasahide YamashitaAkihiro KotsugaiHiroaki Takahashi
    • G03G900
    • G03G9/107G03G9/0836G03G9/0838
    • A carrier for electrophotographic developer essentially consisting of a core material of magnetic particles and thereon provided a resinous coating layer, wherein a weight-average particle-diameter(Dw) of the carrier ranges from 25 to 45 &mgr;m, the content of particles having diameter less than 44 &mgr;m is more than or equal to 75% by weight, the content of particles having diameter more than or equal to 62 &mgr;m is less than one percent by weight, the content of particles having diameter less than 22 &mgr;m is less than or equal to 7.0% by weight, the magnetic moment of the carrier at 1 kilo Oe of magnetic field is more than or equal to 76 emu/g. The carrier shows high optical density of image with no smearing of background area, good reproducibility in developing of small dots in image with no carrier deposition.
    • 一种电子照相显影剂载体,其基本上由磁性颗粒的芯材料组成,其上提供了树脂涂层,其中载体的重均粒径(Dw)为25-45μm,颗粒的含量为 44重量%以上为75重量%以上,直径大于等于62μm的颗粒的含量小于1重量%,直径小于22μm的颗粒的含量小于或等于 至7.0重量%,载流子在1千欧磁场的磁矩大于或等于76emu / g。 载体显示高的图像光密度,没有背景区域的污迹,在没有载体沉积的图像中小点的显影中具有良好的再现性。