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    • 7. 发明申请
    • TONER, PROCESS FOR PRODUCING TONER, AND TWO-COMPONENT DEVELOPING AGENT
    • 调色剂,生产调色剂的方法和两组分显影剂
    • US20110165510A1
    • 2011-07-07
    • US13050613
    • 2011-03-17
    • Yasuhito YUASAHidekazu ARASEMasahisa MAEDA
    • Yasuhito YUASAHidekazu ARASEMasahisa MAEDA
    • G03G9/08
    • G03G9/0804G03G9/0817G03G9/08782G03G9/08795G03G9/08797
    • A toner or two-component developer is obtained by mixing, aggregating, and heating resin particles, colorant particles, and wax particles in an aqueous medium. A gel permeation chromatography (GPC) measurement of the resin particles shows that a weight-average molecular weight is 10000 to 60000, and the ratio of the weight-average molecular weight to a number-average molecular weight is 1.5 to 6. The wax particles include at least a first wax and a second wax. An endothermic peak temperature (melting point Tmw1 (° C.)) of the first wax based on a DSC method is 50° C. to 90° C. An endothermic peak temperature (melting point Tmw2 (° C.)) of the second wax based on the DSC method is at least 5° C. to 50° C. higher than Tmw1. Thus, the toner can have a smaller particle size and a sharp particle size distribution without requiring a classification process, can achieve a longer life, and can suppress transfer voids or scattering during transfer.
    • 通过在水性介质中混合,聚集和加热树脂颗粒,着色剂颗粒和蜡颗粒来获得调色剂或双组分显影剂。 树脂颗粒的凝胶渗透色谱(GPC)测定表明重均分子量为10000〜60000,重均分子量与数均分子量的比为1.5〜6。蜡颗粒 包括至少第一蜡和第二蜡。 基于DSC法的第一蜡的吸热峰温度(熔点Tmw1(℃))为50℃〜90℃。第二蜡的吸热峰温度(熔点Tmw2(℃)) 基于DSC法的蜡比Tmw1高至少5℃至50℃。 因此,调色剂可以具有较小的粒度和尖锐的粒度分布,而不需要分级过程,可以实现更长的寿命,并且可以抑制转印期间的转移空隙或散射。
    • 8. 发明申请
    • TONER, METHOD FOR PRODUCING TONER, TWO COMPONENT DEVELOPER, AND IMAGE FORMING APPARATUS
    • 调色剂,生产调色剂的方法,两组分显影剂和图像形成装置
    • US20100104971A1
    • 2010-04-29
    • US12650033
    • 2009-12-30
    • Yasuhito YUASAHidekazu ARASE
    • Yasuhito YUASAHidekazu ARASE
    • G03G9/00
    • G03G15/0189G03G9/0804G03G9/0825G03G9/0827G03G9/08775G03G9/08795G03G9/08797G03G9/09708G03G9/1136G03G9/1137G03G2215/0135G03G2215/0609
    • First toner of the present invention includes colored particles and an external additive. The colored particles are produced by heating and aggregating a mixture that includes a resin particle dispersion in which first resin particles are dispersed and a pigment particle dispersion in which pigment particles are dispersed, so that at least part of the first resin particles is melted. The colored particles have a finely roughened surface. Second toner of the present invention includes aggregated particles including at least first resin particles and pigment particles, and colored particles having a finely roughed surface formed by fusing at least part of wax and at least part of second resin particles on the surface of the aggregated particles. Third toner of the present invention includes aggregated particles including at least first resin particles and pigment particles, and colored particles having a finely roughened surface formed by fusing at least part of third resin particles and at least part of fourth resin particles on the surface of the aggregated particles. When the aggregated particles are formed in an aqueous medium, the pH is controlled in the specified range. The toner can achieve oilless fixing that prevents offset without using oil while maintaining high OHP transmittance. Therefore, it is possible to eliminate the spent of toner components on a carrier and to make the life longer. Moreover, thinning or scattering during transfer can be suppressed, thus ensuring high transfer efficiency.
    • 本发明的第一调色剂包括着色颗粒和外部添加剂。 着色颗粒是通过加热和聚集包括其中分散有第一树脂颗粒的树脂颗粒分散体和分散有颜料颗粒的颜料颗粒分散体的混合物制成的,使得至少部分第一树脂颗粒熔融。 着色颗粒具有粗糙的粗糙表面。 本发明的第二调色剂包括至少包含第一树脂颗粒和颜料颗粒的凝集颗粒,以及通过在凝集颗粒的表面上融合至少部分蜡和至少部分第二树脂颗粒而形成的粗糙表面的着色颗粒 。 本发明的第三调色剂包括至少包含第一树脂颗粒和颜料颗粒的凝集颗粒,以及通过将至少一部分第三树脂颗粒和至少部分第四树脂颗粒融合在第二树脂颗粒的表面上而形成的细粗糙表面的着色颗粒 聚集颗粒。 当聚集的颗粒在水性介质中形成时,将pH控制在指定的范围内。 调色剂可以实现无油固定,防止偏移而不使用油,同时保持高OHP透光率。 因此,可以消除载体上的调色剂成分的消耗,并延长寿命。 此外,可以抑制转印期间的变薄或散射,从而确保高的转印效率。