| Abstract:The yarn-making paper was prepared from 100% bleached softwood kraft pulp as fiber raw material, and the effects of preparation conditions, cellulose microfibrils (MFC) and waterborne polyurethane (WPU) on the mechanical properties of yarn-making paper were investigated. The results showed that the best mechanical properties were obtained when the fiber beating degree was 45 °SR, the amount of cationic starch (CS), polyamide epichlorohydrin (PAE) and amphoteric polyacrylamide (AmPAM) was 1.0%, 0.5 ‰ and 1.0% respectively, the amount of MFC was 0.5%, and the amount of WPU impregnated was 0.5 g/m2. The longitudinal tensile index and transverse tensile index of the yarn-making paper prepared under these conditions are 118.2 N·m/g and 23.8 N·m/g, respectively, the longitudinal elongation at break is 4.3%, and the aspect ratio is 5.0. |