Developer for developing electrostatic images and process for forming
images
    21.
    发明授权
    Developer for developing electrostatic images and process for forming images 失效
    用于显影静电图像的显影剂和形成图像的工艺

    公开(公告)号:US4868085A

    公开(公告)日:1989-09-19

    申请号:US171249

    申请日:1988-03-22

    申请人: Shuichi Aita

    发明人: Shuichi Aita

    CPC分类号: G03G9/09708 G03G9/08755

    摘要: A developer for developing electrostatic latent images comprises a toner comprising a colorant and a binder resin composed of a non-linear, low melting point polyester resin, inorganic fine powder A having BET specific surface area of 0.5-30 m.sup.2 /g and inorganic fine powder B having BET specific surface area of 40-400 m.sup.2 /g measured by means of nitrogen adsorption.

    摘要翻译: 用于显影静电潜像的显影剂包括调色剂,其包含着色剂和由非线性,低熔点聚酯树脂构成的粘合剂树脂,BET比表面积为0.5-30m 2 / g的无机细粉末A和无机细粉 B通过氮吸附测定BET比表面积为40-400m2 / g。

    Image forming method utilizing toner having inorganic particles and
particles of a specific sphericity
    22.
    发明授权
    Image forming method utilizing toner having inorganic particles and particles of a specific sphericity 失效
    利用具有无机颗粒和特定球形度的颗粒的调色剂的成像方法

    公开(公告)号:US5915150A

    公开(公告)日:1999-06-22

    申请号:US803506

    申请日:1997-02-20

    摘要: An electrophotographic image forming method according to (I) a so-called simultaneous development and cleaning scheme or cleaner-less scheme is effectively operated by using a specific non-magnetic toner. (II) The non-magnetic toner comprises non-magnetic toner particles having a shape factor SF-1 of 120-160, a shape factor SF-2 of 115-140 and a weight-average particle size of 4-9 .mu.m. (III) The non-magnetic toner further includes inorganic fine particles (a) having a number-average primary particle size of at most 50 nm and spherical fine particles (b) having a number-average primary particle size of 50-1000 nm and a surface area-based sphericity .psi. of 0.91-1.00, respectively externally added to the non-magnetic toner particles.

    摘要翻译: 通过使用特定的非磁性调色剂有效地操作根据(I)所谓的同时显影和清洁方案或无清洁方案的电摄影图像形成方法。 (II)非磁性调色剂包括形状因子SF-1为120-160,形状因子SF-2为115-140,重均粒径为4-9μm的非磁性调色剂颗粒。 (III)非磁性调色剂还包括数均一次粒径为50nm以下的无机微粒(a)和数均一次粒径为50〜1000nm的球状微粒(b), 分别外部添加到非磁性调色剂颗粒上的基于表面积的球形度psi为0.91-1.00。

    Toner for developing electrostatic images, binder therefor and process
for production thereof
    23.
    发明授权
    Toner for developing electrostatic images, binder therefor and process for production thereof 失效
    用于显影静电图像的调色剂,用于其的粘合剂及其生产方法

    公开(公告)号:US4966829A

    公开(公告)日:1990-10-30

    申请号:US275599

    申请日:1988-11-23

    IPC分类号: G03G5/07 G03G9/08 G03G9/087

    摘要: A toner for developing electrostatic latent images with a good combination of fixability, anti-offset characteristic, anti-sticking characteristic and pulverizability is provided as a composition comprising a colorant or magnetic material and a binder resin. The binder resin has 0.1 to 60 wt. % of a chloroform-insoluble or a THF (tetrahydrofuran)-insoluble and a THF-soluble, the THF-soluble providing a molecular weight distribution in the chromatogram of GPC (gel permeation chromatography) thereof such that there are a main peak in the molecular weight range of 1,000 to 25,000 and a sub-peak or shoulder in the molecular weight range of 2,000 to 150,000. The binder resin may suitably be obtained through two polymerization steps including a solution polymerization step and a suspension polymerization step.

    摘要翻译: 作为包含着色剂或磁性材料和粘合剂树脂的组合物,提供了具有定影性,抗偏移特性,抗粘附特性和可粉碎性的良好组合的用于显影静电潜像的调色剂。 粘合剂树脂为0.1〜60wt。 %的不溶于氯仿或THF(四氢呋喃) - 不溶性和可溶于THF的THF可溶性在GPC(凝胶渗透色谱法)的色谱图中提供分子量分布,使得分子中存在主峰 重量范围为1,000至25,000,亚峰或肩峰的分子量范围为2,000至150,000。 粘合剂树脂可以通过包括溶液聚合步骤和悬浮聚合步骤的两个聚合步骤合适地获得。