Magnetic toner
    1.
    发明授权
    Magnetic toner 失效
    磁性调色剂

    公开(公告)号:US5456990A

    公开(公告)日:1995-10-10

    申请号:US214237

    申请日:1994-03-17

    摘要: A magnetic toner comprising a binder resin having dispersed therein a magnetic powder is disclosed, wherein the magnetic toner has a volume average particle diameter (D.sub.50) of from 4 to 9 .mu.m, the magnetic powder has a number average particle diameter of from 0.15 to 0.25 .mu.m (hereinafter simply referred to as a particle diameter), a BET specific surface area of from 6 to 8 m.sup.2 /g, and a residual magnetization of from 7 to 10 emu/g, the magnetic powder is present in an amount of from 30 to 70% based on the total weight of the magnetic toner, and the magnetic toner has adhered to the surface thereof silica powder having been rendered hydrophobic. The magnetic toner exhibits superior performance in terms of image density, definition, dot and fine line reproducibility, and environmental stability.

    摘要翻译: 公开了一种包含分散有磁性粉末的粘合剂树脂的磁性调色剂,其中磁性调色剂的体积平均粒径(D50)为4〜9μm,磁粉的数均粒径为0.15〜 0.25μm(以下简称为粒径),BET比表面积为6〜8m 2 / g,剩余磁化强度为7〜10emu / g,磁粉的存在量为 基于磁性调色剂的总重量为30至70%,并且磁性调色剂已经附着到具有疏水性的二氧化硅粉末的表面上。 磁性调色剂在图像密度,定义,点和细线再现性以及环境稳定性方面表现出优异的性能。

    Process for making magnetic toners
    2.
    发明授权
    Process for making magnetic toners 失效
    制造磁性调色剂的方法

    公开(公告)号:US5474871A

    公开(公告)日:1995-12-12

    申请号:US338863

    申请日:1994-11-14

    IPC分类号: G03G9/087 G03G9/08 G03G9/083

    摘要: A magnetic toner comprising a binder resin a magnetic substance is disclosed, the toner containing from 2 to 20% by weight of a polyolefin, preferably polyethylene, having a dispersed particle size of from 0.01 to 0.5 .mu.m. The particle size distribution of the polyolefin preferably has a coefficient of variation of from 20 to 40%. The magnetic toner is fixable with low heat energy, hardly causes offset and smudge, and has a reduced abrasive action on a photoreceptor. It is therefore suitable for use in a fixing means with no cleaning mechanism, a machine with a double side copying function, or an organic photoreceptor.

    摘要翻译: 公开了包含粘合剂树脂和磁性物质的磁性调色剂,该调色剂含有2至20重量%的分散粒度为0.01至0.5μm的聚烯烃,优选聚乙烯。 聚烯烃的粒度分布优选具有20〜40%的变异系数。 磁性调色剂可以以低热量固定,几乎不引起胶印和污迹,并且对感光体具有减少的研磨作用。 因此适用于没有清洁机构的固定装置,具有双面复印功能的机器或有机感光体。