公开(公告)号：US4790486A

公开(公告)日：1988-12-13

申请号：US926707

申请日：1986-10-31

申请人： Shigeru Eimaeda ,  Kunihiko Aida ,  Shinji Seto ,  Takao Suzuki

发明人： Shigeru Eimaeda ,  Kunihiko Aida ,  Shinji Seto ,  Takao Suzuki

IPC分类号： C09C1/00 ,  C09C1/28 ,  C09C1/30 ,  D21H17/67 ,  D21H17/68 ,  B02C19/12

CPC分类号： C09C1/30 ,  C09C1/3009 ,  D21H17/68 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/62

摘要： An improved paper-making hydrous acid filler is prepared by classifying or pulverizing a slurry containing fine particles of hydrous silicic acid, which is obtained by neutralizing sodium silicate with sulfuric acid, by a wet classifier or a wet pulverizer, so that the proportion of particles having a particles size of 1 to 30 .mu.m is at least 80% and the proportion of particles having a particle size of at least 70 .mu.m is not more than 0.4%. The filler has a function of improving the ink receptivity of the paper of the internal additive type and is capable of improving the opacity of the paper after printing.

摘要翻译： 通过湿式分级机或湿式粉碎机将通过用硫酸中和硅酸钠获得的含水硅酸微粒的浆料分级或粉碎制备改进的造纸含水酸填料，使得颗粒的比例 具有1至30μm的颗粒尺寸至少为80％，并且具有至少70μm的粒径的颗粒的比例不大于0.4％。 填充剂具有改善内部添加剂类型的纸的油墨接受性并且能够改善印刷后纸张的不透明度的功能。