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    • 7. 发明授权
    • Toner for electrophotography
    • 电子照相用碳粉
    • US07862974B2
    • 2011-01-04
    • US12578317
    • 2009-10-13
    • Kouji SugamaMasafumi UchidaKenji YamaneKenji HayashiRyuji Kitani
    • Kouji SugamaMasafumi UchidaKenji YamaneKenji HayashiRyuji Kitani
    • G03G5/00G03G9/00
    • G03G9/09G03G9/0821G03G9/0825G03G9/0827
    • An embodiment may be an electrophotographic toner which comprises at least one toner particle which comprises an inner layer and an outer layer covering the inner layer, wherein a cross-sectional area ratio of the outer layer to the inner layer is 0.05-0.46, and wherein a non-uniform thickness exists in the outer layer, and further the average thickness (t) taken at 5 positions as calculated by, is about 0.2—about 1.0 μm, t=(t1+t2+t3+t4+t5)/5 (unit of t1-t5 is μm)wherein t1 represents a thickness of the thickest part of the outer layer, and t2-t5 each represent a thickness of a second to a fifth thickest part of the outer layer in one particle, and wherein a glass transition point Tg of the inner layer is about 2—about 45° C. lower than Tg of the outer layer.
    • 一个实施方案可以是包含至少一个调色剂颗粒的电子照相调色剂,其包含内层和覆盖内层的外层,其中外层与内层的横截面积比为0.05-0.46,并且其中 在外层中存在不均匀的厚度,并且通过计算得到的5个位置处的平均厚度(t)进一步为约0.2〜约1.0μm,t =(t1 + t2 + t3 + t4 + t5)/ 5 (t1-t5的单位为μm),其中t1表示外层的最厚部分的厚度,t2-t5各自表示一个颗粒中外层的第二至第五最厚部分的厚度,其中 内层的玻璃化转变点Tg比外层的Tg低约2-约45℃。