PAPERMAKING SILICIC ACID HYDRATE FILLER, METHOD FOR PRODUCING PAPERMAKING SILICIC ACID HYDRATE FILLER AND NEWSPRINT PAPER USING PAPERMAKING SILICIC ACID HYDRATE FILLER

摘要

PROBLEM TO BE SOLVED: To provide a papermaking silicic acid hydrate filler having excellent inking properties with slight wire abrasion or lowering of yield during papermaking.;SOLUTION: The papermaking silicic acid hydrate filler is obtained by wet classifying a silicic acid hydrate slurry after wet pulverization or without carrying out the wet pulverization. The ratio of particles having ≥70 μm diameter is 0.4 and ≤0.8 wt.% and the average particle diameter calculated on the basis of the average particle size distribution according to laser diffractometry is within the range of 10-30 μm.;COPYRIGHT: (C)2004,JPO