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    • 1. 发明授权
    • Aqueous ink jet recording liquid and ink jet recording method
    • 水性喷墨记录液和喷墨记录方法
    • US06378999B1
    • 2002-04-30
    • US09115767
    • 1998-07-15
    • Takatsugu DoiNobuyuki IchizawaAtsushi SuzukiKyoko HorinouchiToshitake YuiKen HashimotoKunichi Yamashita
    • Takatsugu DoiNobuyuki IchizawaAtsushi SuzukiKyoko HorinouchiToshitake YuiKen HashimotoKunichi Yamashita
    • G01D1100
    • C09D11/322
    • In an aqueous ink jet recording liquid including at least water, a water-soluble organic solvent and a water-insoluble coloring material, (1) the absolute value of the zeta potential is 20 mV or more, (2) the conductivity is from 0.05 to 0.75 S/m, (3) the number average particle size of dispersed particles is from 15 to 200 nm, and (4) the number of particles having a particle size of 0.5 &mgr;m or more present in one liter is 2.5×1011 or less. Due to the aforementioned, dispersion stability of the coloring material can be maintained in the ink jet recording liquid in which the water-insoluble coloring material is dispersed, and the aqueous ink jet recording liquid is provided, which is excellent regarding stability over long periods of time, causes no ink flow route clogging and prevents kogation in printing, provides a recorded material having excellent rub resistance, printing quality, optical density, water resistance and lightfastness, and can prevent uneven density.
    • 在至少包含水,水溶性有机溶剂和水不溶性着色材料的水性喷墨记录液中,(1)ζ电位的绝对值为20mV以上,(2)电导率为0.05 至0.75S / m,(3)分散粒子的数均粒径为15〜200nm,(4)在1升中存在粒径为0.5μm以上的粒子数为2.5×1011以下 。 由于上述原因,可以在其中分散有水不溶性着色材料的喷墨记录液中提供着色材料的分散稳定性,并且提供了水性喷墨记录液体,这对于长时间的稳定性是优异的 时间不会导致油墨流动堵塞并防止印刷中的结垢,提供具有优异的耐擦性,印刷质量,光密度,耐水性和耐光性的记录材料,并且可以防止不均匀的密度。
    • 10. 发明授权
    • Ink-jet recording method and ink-jet recording apparatus
    • 喷墨记录方法和喷墨记录装置
    • US06572227B2
    • 2003-06-03
    • US10014043
    • 2001-12-11
    • Kunichi YamashitaAtsushi SuzukiToshitake Yui
    • Kunichi YamashitaAtsushi SuzukiToshitake Yui
    • B41J201
    • C09D11/322
    • The ink-jet recording method and apparatus use an ink containing at least, a pigment self-dispersible in water, a water soluble organic solvent and water, and carry out printing with an amount of the ink of 20 ng or less per one droplet, and the ink satisfies the following conditions: a dynamic contact angle upon dropping 4 &mgr;L of the ink on plain paper is about 60° or less after one second from dropping; a volume average particle diameter mv of dispersed particles of the pigment in the ink is about from 150 to 250 nm; and in the dispersed particles, a number of particles having a particle diameter of from 0.5 to 5 &mgr;m is about from 25×104 to 2,000×104 per microliter, and a number of particles having a particle diameter of 5 &mgr;m or more is about 100 per microliter or less.
    • 喷墨记录方法和装置使用至少含有在水中可分散的颜料,水溶性有机溶剂和水的油墨,并且每一滴的油墨量为20ng以下的油墨进行印刷, 并且油墨满足以下条件:在普通纸上滴下4μl油墨后的动态接触角在滴下1秒后为约60°以下; 油墨中颜料的分散颗粒的体积平均粒径mv约为150-250nm; 并且在分散颗粒中,许多粒径为0.5-5微米的颗粒约为每微升25×104至2,000×104,粒径为5微米或更大的颗粒数为约100微升或约 减。