... soluble cationic polymer containing carbamyl and the like, and the product can effectively improve the paper intensity, reduce loss of ... , waste water of printing & dyeing mill, and the like. The effect of using cationic-polyacrylamide is several times or ... than using anionic-polyacrylamide, nonionic- polyacrylamide or inorganic salt since the waste water is generally provided with negative charge. 4. ...