Carrier for electrophotographic developer, process for preparing the
same and developer prepared by using said carrier
    5.
    发明授权
    Carrier for electrophotographic developer, process for preparing the same and developer prepared by using said carrier 失效
    用于电子照相显影剂的载体,其制备方法和通过使用所述载体制备的显影剂

    公开(公告)号:US5419994A

    公开(公告)日:1995-05-30

    申请号:US939989

    申请日:1992-09-03

    IPC分类号: G03G9/10 G03G9/107

    CPC分类号: G03G9/10

    摘要: An iron carrier for an electrophotographic developer, the carrier having a mean particle diameter of 25 to 40 .mu.m, a magnetization of at least 160 emu/g at 3000 Oe, an apparent density of 3.0 to 4.2 g/cm.sup.3, a percentage sphericity of at least 80%, and a specific surface area of at least 350 cm.sup.2 /g as determined by an air permeation method; a process for preparing the carrier by a plasma method; and an electrophotographic developer comprising the carrier.

    摘要翻译: 用于电子照相显影剂的铁载体,该载体的平均粒径为25〜40μm,在3000Oe下的磁化强度至少为160emu / g,表观密度为3.0〜4.2g / cm 3,球形度的百分比 至少80%,和通过空气渗透法测定的至少350cm 2 / g的比表面积; 通过等离子体法制备载体的方法; 和包含载体的电子照相显影剂。

    Ferrite carrier for electrophotographic developer and developer using
said carrier
    9.
    发明授权
    Ferrite carrier for electrophotographic developer and developer using said carrier 失效
    用于电子照相显影剂的铁氧体载体和使用所述载体的显影剂

    公开(公告)号:US5518849A

    公开(公告)日:1996-05-21

    申请号:US353061

    申请日:1994-12-09

    CPC分类号: G03G9/1075

    摘要: This invention provides a ferrite carrier for an electrophotographic developer characterized in that a core material is ferrite particle composed of 17.0 to 29.0 mol % of Li.sub.2 O and 71.0 to 83.0 mol % of Fe.sub.2 O.sub.3, exhibits a resistance of 2.5.times.10.sup.8 to 2.5.times.10.sup.9 .OMEGA. when a voltage of 250 V is applied, satisfies the relationship: a.sub.1 -a.sub.2 .ltoreq.1.5 when the resistance (R.sub.1) of the ferrite particle exhibited when a voltage of 250 V is applied thereto is taken as a.sub.1 .times.10.sup.b .OMEGA. and the resistance (R.sub.2) thereof exhibited when a voltage of 1000 V is applied thereto is taken as a.sub.2 .times.10.sup.b .OMEGA. (with the proviso that 1.0.ltoreq.a.sub.1

    摘要翻译: 本发明提供一种用于电子照相显影剂的铁氧体载体,其特征在于,芯材是由17.0至29.0mol%的Li 2 O和71.0至83.0mol%的Fe 2 O 3组成的铁氧体颗粒,当电压为2.5×10 8至2.5×10 9Ω时, 当施加250V的电压时,当铁氧体颗粒的电阻(R1)为a1×10巴欧姆时,满足以下关系:a1-a2

    Method for manufacturing a resin-coated carrier for an
electrophotographic developer
    10.
    发明授权
    Method for manufacturing a resin-coated carrier for an electrophotographic developer 失效
    电子照相显影剂用树脂涂布载体的制造方法

    公开(公告)号:US5491042A

    公开(公告)日:1996-02-13

    申请号:US283249

    申请日:1994-07-29

    IPC分类号: G03G9/113

    CPC分类号: G03G9/1131

    摘要: This invention provides a method for manufacturing a resin-coated carrier for an electrophotographic developer comprising the steps of coating the surface of a carrier core which is a dielectric material, with a resin which is also a dielectric material and then baking the thus obtained resin coated carrier core by means of microwave heating under the conditions that a thickness of the resin-coated carrier layer to be baked is in the range of from 5 to 25 mm, the number of revolution of agitating blade for agitating the microwave is in the range of from 20 to 40 rpm and an irradiation time is in the range of from 30 seconds to 10 minutes, to obtain the resin-coated carrier. The resin-coated carriers are characterized by having an excellent durability, excellent resistance to the environment, as well as excellent producibility and economy.

    摘要翻译: 本发明提供了一种用于制造用于电子照相显影剂的树脂涂覆载体的方法,包括以下步骤:用作为介电材料的树脂涂覆作为介电材料的载体芯的表面,然后烘焙由此获得的树脂涂覆 通过微波加热在被烘烤的树脂被覆载体层的厚度为5〜25mm的条件下,用于搅拌微波的搅拌叶片的转数为 20〜40rpm,照射时间为30秒〜10分钟,得到树脂被覆载体。 树脂涂布载体的特征在于具有优异的耐久性,优异的耐环境性,以及优异的可生产性和经济性。