改性聚丙烯酰胺在造纸中的应用

采用新的改性方法，自制出一种新型结构的造纸助剂——阳离子型聚丙烯酰胺（CPAM），并将其应用于石膏纤维与植物纤维的混合造纸过程。通过正交实验，确定了对于纸张撕裂指数的最佳条件为：打浆度50^oSR、石膏用量20％、CPAM用量1．0％、阳离子淀粉用量0．5％；对于纸张断裂长的最佳条件为：打浆度70^oSR、石膏用量20％、CPAM用量0％、阳离子淀粉用量0．5％；对于纸张白度的最佳条件为：打浆度30^oSR、石膏用量20％、CPAM用量0．5％、阳离子淀粉用量1．0％。并考察了CPAM与石膏纤维以不同方式加入对纸张物理性能的影响。

Application of Modified Polyacrylamide in Papermaking

New modified method was used to prepare cation polyacrylamide（CPAM）,an aid in papermaking with a new structure. The cation polyacrylamide was applied in the mix of plaster - fibre and plant - fibre of the papermakig process. The optimum conditions were determined as follows by orthogonal experiment： t＇or the tearing index of paper, beating degree 50^oSR, dosage of plaster - fibre 20 %, dosage of CPAM 1.0 %, and dosage of cation amylum 0.5 % ; for the breaking length of paper, beating degree 70^oSR, dosage of plaster - fibre 20 %, dosage of CPAM 0 and dosage of cation amylum 0.5%; for white degree of paper, beating degree 30^oSR, dosage of plaster- fibre 20%, dosage of CPAM 0.5% and dosage of cation amylum 1.0%. And the different feeding methods of CPAM and plaster- fibre were also discussed.