海藻酸钠阴离子助剂对纸张增强的初探

Effects of SA as Anionic Additive on Paper Strength

研究海藻酸钠(SA)作为阴离子助剂与阳离子聚合电解质阳离子淀粉(CS)共用组成二元增强体系对针阔叶木为1:4的浆料所抄纸张的增强效果。结果表明:CS/SA二元增强体系对纸张的增强效果比单一加入阳离子聚合电解质CS的增强效果好,该二元体系对纸张物理强度增加的最大值,比不添加增强剂时所抄造纸张的伸长率、抗张指数、撕裂指数和耐折度分别提高了93.3%,28.2%,15.4%和122%,比单一加入CS时纸张所能达到的最佳伸长率、抗张强度和耐折度分别提高了7.4%,12.0%和23%,而对撕裂强度提高不大。CS/SA二元增强体系较单独使用CS时的添加量小,有利于保护环境。阴离子助剂SA可通过提高浆料的保水值来提高浆料纤维的润胀性能,减少打浆能耗。

is paper mainly studied the anionic additive sodium alginate（SA）and cationic polyelectrolyte additive cationic starch（ CS）composed the binary paper strength system to mixed softwood and hardwood pulp which the softwood：hardwood is 1：4.e results showed that：e peak of CS/SA binary paper strengthening system on the physical strength of paper was better than none of addition and a single addition of CS.e paper＇s elongation rate,tensile index,tear index and folding endurance were increased of 93.3%,28.2%,15.4%and 122%than the papers with no addition;and the paper＇s elongation rate,tensile index and folding endurance were increased of 7.4%,12.0%and 23%than the papers with a single addition of CS.e dosage of CS/SA binary system was less than a single addition of CS,which was beneficial to environmental protection.e anionic additive SA could improve the run-up performance of pulp fibers through enhancing the pulp＇s water retention value,which could reduce the energy consumption of the beating.