PAPER CONTAINING PREAGGREGATED FILLER AND PROCESS FOR PRODUCING THE SAME

摘要

A paper which contains a preaggregated filler having an average particle diameter as determined by laser diffractometry of 10-80 mum and obtained by treating a filler with a combined acrylamide copolymer comprising (A) an anionic polysaccharide and (B) a cationic and/or ampholytic acrylamide copolymer, in such an amount that the paper has an ash content of 3-40 wt.% on a solid basis. This paper is satisfactory in paper strength including strength and stiffness, has high smoothness, and attains excellent print quality.