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    • 5. 发明授权
    • Method of producing finely divided fibrous cellulose particles
    • 细纤维纤维素颗粒的生产方法
    • US5269470A
    • 1993-12-14
    • US935998
    • 1992-08-27
    • Hisao IshikawaSeiichi Ide
    • Hisao IshikawaSeiichi Ide
    • B02C17/00B02C17/16D21D1/20D21D1/28B02C21/00
    • D21D1/28
    • Finely divided fibrous cellulose particles having a high viscosity, suspension stability and water-retaining property are produced by suspending cellulose particles in water or an organic liquid, and subjecting the resultant cellulose particle slurry to a wet grinding procedure in a solid medium-agitation type grinder in which the cellulose particles are agitated and ground with solid medium particles, for example, glass beads, to an extent such that the cellulose particles are divided into fine fibrous cellulose particles having a water-retaining power WRP of 150% or more in accordance with an equation (I):WRP(%)=(A-B)/B.times.100 (I)wherein A represents the weight of a sample of the resultant cellulose particle suspension centrifugally hydroextracted at an acceleration of 3,000 G for 15 minutes, and B represents the weight of the sample dried at 105.degree. C. for 5 hours or more.
    • 通过将纤维素颗粒悬浮在水或有机液体中制备具有高粘度,悬浮稳定性和保水性的细碎纤维素颗粒,并将所得纤维素颗粒浆料在固体介质搅拌型研磨机 其中将纤维素颗粒搅拌并用固体介质颗粒(例如玻璃珠)研磨至一定程度,使得纤维素颗粒分为具有150%或更高的保水力WRP的细纤维状纤维素颗粒,根据 方程(I):WRP(%)=(AB)/ B×100(I)其中A表示以3,000G的加速度离心加氢15分钟的所得纤维素颗粒悬浮液的样品的重量,B表示重量 的样品在105℃下干燥5小时以上。