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    Carrier for use in electrophotography, two component-type developer and image forming method
    3.
    发明公开
    Carrier for use in electrophotography, two component-type developer and image forming method 失效
    Trägerteilchenfürdie Elektrophotographie，Zweikomponentententententlerler und Bildherstellungsverfahren。

    公开(公告)号：EP0580135A1

    公开(公告)日：1994-01-26

    申请号：EP93111663.6

    申请日：1993-07-21

    申请人： CANON KABUSHIKI KAISHA

    发明人： Baba, Yoshinobu ,  Ikeda, Takeshi ,  Amano, Yasuko ,  Itabashi, Hitoshi

    IPC分类号： G03G9/107

    CPC分类号： G03G9/1075

    摘要： A two component-type developer for electrophotography showing improved electrophotographic performances and also free from carrier adhesion (undesirable carrier transfer to the photosensitive member and recording materials) is constituted by using a magnetic carrier of 5 - 100 µm in particle size. The carrier has a bulk density of at most 30 g/cm³, and magnetic properties including: a magnetization of 30 - 150 emu/cm³ under a magnetic field strength of 1000 oersted, a magnetization (residual magnetization σ r ) of at least 25 emu/cm³ under a magnetic field strength of zero oersted, a coercive force of less than 300 oersted, and a relationship of:

    |σ₁₀₀₀-σ₃₀₀|/σ₁₀₀₀ ≦ 0.40

    wherein σ₁₀₀₀ and σ₃₀₀ denote magnetizations under magnetic field strength of 1000 oersted and 300 oersted, respectively.

    摘要翻译： 通过使用粒径为5-100μm的磁性载体，构成了用于电子照相的双组分型显影剂，其显示出改善的电子照相性能并且也没有载体粘附（对感光构件和记录材料的不良载体转移）。 载体的堆积密度至多为30g / cm 3，磁特性包括：在1000奥斯特的磁场强度下磁化强度为30-150emu / cm 3，磁化强度（残余磁化σr ）至少为25emu / cm 3，在0奥氏体的磁场强度下，小于300奥斯特的矫顽力，以及| |σ1000-西格玛300 | / sigma 1000 <0.40的关系，其中σ 1000和西格玛300分别表示在1000奥斯特和300奥斯特的磁场强度下的磁化。

    Magnetic coated carrier, two-component type developer and developing method
    4.
    发明公开
    Magnetic coated carrier, two-component type developer and developing method 失效
    Beschichtete magnetischeTrägerteilchen，zwei-Komponententyp-Entwickler und Entwicklungsverfahren

    公开(公告)号：EP0801334A1

    公开(公告)日：1997-10-15

    申请号：EP97302355.9

    申请日：1997-04-07

    申请人： CANON KABUSHIKI KAISHA

    发明人： Baba, Yoshinobu ,  Sato, Yuko ,  Tokunaga, Yuzo ,  Ikeda, Takeshi ,  Itabashi, Hitoshi

    IPC分类号： G03G9/107 ,  G03G9/113 ,  G03G9/10

    CPC分类号： G03G9/1136 ,  G03G9/10 ,  G03G9/107

    摘要： A magnetic coated carrier suitable for constituting a two-component type developer for use in electrophotography is composed of magnetic coated carrier particles comprising magnetic carrier core particles and a resinous surface coated layer coating the magnetic carrier core particles. The carrier is suitably constituted so as to satisfy the condition of: (a) the magnetic carrier core particles has a resistivity of at least 1x10 10 ohm.cm, and the magnetic coated carrier has a resistivity of at least 1x10 12 ohm.cm, (b) the magnetic coated carrier has a number-average particle size of 1- 100 µm and has such a particle size distribution that particles having particle sizes of at most a half of the number-average particle size occupy an accumulative percentage of at most 20 % by number, (c) the magnetic coated carrier has a shape factor SF-1 of 100 - 130, (d) the magnetic coated carrier has a magnetization at 1 kilo-oersted of 40 - 250 emu/cm 3 , and (e) the resinous surface coating layer comprises a coating resin composition which in turn comprises a straight silicone resin and a coupling agent. The straight silicone resin includes trifunctional silicon and difunctional silicon in an atomic ratio of 100:0 - 40:60.

    摘要翻译： 适用于构成用于电子照相术的双组分型显影剂的磁性涂层载体由包括磁性载体芯颗粒和涂覆磁性载体芯颗粒的树脂表面涂层的磁性涂覆载体颗粒组成。 载体适当地构成以满足以下条件：（a）磁性载体芯颗粒具有至少1×10 10欧姆·厘米的电阻率，并且磁性涂覆载体的电阻率至少为1×10 12 （b）磁性涂布载体的数均粒径为1-100μm，并且具有这样的粒度分布，即粒径至多为数均粒径的一半的粒子占据了 累积百分比最多为20％，（c）磁性涂层载体的形状因子SF-1为100-130，（d）磁性涂层载体的磁化强度为1千欧，为40-250emu / cm 3，和（e）树脂表面涂层包括涂层树脂组合物，其又包含直的有机硅树脂和偶联剂。 直的有机硅树脂包括原子比为100:0-40:60的三官能硅和二官能硅。

    Carrier for use in electrophotography, two component-type developer and image forming method
    5.
    发明公开
    Carrier for use in electrophotography, two component-type developer and image forming method 失效
    Trägerteilenfürdie Elektrophotographie，Zweikomponentententententlerler und Bildherstellungsverfahren。

    公开(公告)号：EP0584555A1

    公开(公告)日：1994-03-02

    申请号：EP93111969.7

    申请日：1993-07-27

    申请人： CANON KABUSHIKI KAISHA

    发明人： Baba, Yoshinobu ,  Amano, Yasuko ,  Itabashi, Hitoshi

    IPC分类号： G03G9/107

    CPC分类号： G03G9/10 ,  G03G9/1075

    摘要： A two component-type developer for electrophotography showing improved electrophotographic performances and also free from carrier adhesion (undesirable carrier transfer to the photosensitive member and recording materials) is constituted by using a magnetic carrier comprising a soft magnetic material of 5 - 100 µm in particle size. The carrier has a bulk density of at most 3.0 g/cm³, and magnetic properties including: a magnetization of 30 - 150 emu/cm³ under a magnetic field strength of 1000 oersted, and relationships (1) and (2):

    |σ₁₀₀₀-σ₃₀₀|/σ₁₀₀₀ ≦ 0.40   (1),

    wherein σ₁₀₀₀ and σ₃₀₀ denote magnetizations (emu/cm³) under magnetic field strengths of 1000 oersted (Oe) and 300 oersted (Oe), respectively, and

    0.15 (emu/cm³.Oe) ≦ |σ₁₀₀-σ r |/₁₀₀ (Oe)   (2),

    wherein σ₁₀₀ and σ r denote magnetizations (emu/cm³) under magnetic field strengths of 100 (Oe) and zero (Oe), respectively.

    摘要翻译： 用于电子照相的双组分型显影剂通过使用包含5-100μm的软磁性材料的磁性载体构成，其显示出改善的电子照相性能并且也不含载体粘附（对感光构件和记录材料的不良载体转移） 尺寸。 载体的体积密度为3.0g / cm 3以下，磁特性包括：在1000奥斯特的磁场强度下磁化强度为30-150emu / cm 3，以及（1）和（ 2）：| sigma 1000-sigma 300| / sigma 1000

    Magnetic coated carrier, two-component type developer and developing method
    6.
    发明公开
    Magnetic coated carrier, two-component type developer and developing method 失效
    磁性涂层载体，双组分型显影剂和显影方法

    公开(公告)号：EP0801335A1

    公开(公告)日：1997-10-15

    申请号：EP97302356.7

    申请日：1997-04-07

    申请人： CANON KABUSHIKI KAISHA

    发明人： Baba, Yoshinobu ,  Ikeda, Takeshi ,  Sato, Yuko ,  Itabashi, Hitoshi ,  Tokunaga, Yuzo

    IPC分类号： G03G9/107 ,  G03G9/113 ,  G03G9/10

    CPC分类号： G03G9/107 ,  G03G9/0821 ,  G03G9/0827 ,  G03G9/10 ,  G03G9/1132 ,  G03G9/1136

    摘要： A magnetic coated carrier suitable for constituting a two-component type developer for use in electrophotography is composed of magnetic coated carrier particles comprising magnetic coated carrier particles comprising magnetic carrier core particles each comprising a binder resin and metal oxide particles, and a coating layer surface-coating each carrier core particle. The metal oxide particles have been subjected to a surface lipophilicity-imparting treatment. The magnetic carrier core particles have a resistivity of at least 1x10 10 ohm.cm, and the magnetic coated carrier has a resistivity of at least 1x10 12 ohm.cm. The magnetic coated carrier has a particle size distribution such that (i) it has a number-average particle size Dn of 5 - 100 µm, (ii) it satisfies a relationship of Dn/σ ≧ 3.5, wherein σ denotes a standard deviation of number-basis particle size distribution of the carrier, and (iii) it contains at least 25 % by number of particles having particle sizes of at most Dn x 2/3.

    摘要翻译： 适用于构成用于电子照相术的双组分型显影剂的磁性涂层载体由磁性涂层载体颗粒组成，所述磁性涂层载体颗粒包含磁性涂层载体颗粒，所述磁性涂层载体颗粒包含各自包含粘合剂树脂和金属氧化物颗粒的磁性载体芯颗粒和涂层表面 - 涂覆每个载体芯颗粒。 金属氧化物颗粒已经受到表面亲脂性赋予处理。 磁性载体芯颗粒具有至少1×10 10 ohm.cm的电阻率，并且磁性涂覆的载体具有至少1×10 12 ohm.cm的电阻率。 磁性涂层载体的粒度分布使得（i）其数均粒径Dn为5-100μm，（ii）其满足关系Dn /σ≥3.5，其中σ表示标准偏差为 （iii）其含有至少25％数量的粒径至多为Dn×2/3的颗粒。