Precipitated calcium carbonate is a good paper filler, the fillerretention rate improve after modification.
轻质碳酸钙是良好的造纸填料，通过改性可有效提高其留着率。
2
The paper sample analysis indicated that the process improved fillerretention, paper ash content and opacity, and decreased white water consistency.
检测纸样结果表明：该工艺提高了填料留着率、成纸灰分、不透明度、降低了白水浓度。
3
The study showed that this kind of cationic starch has more positive charges and has good effects on the fibers. It has significant effect on fillerretention and drainage in deinked pulp.