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研究DCS对瓦楞原纸造纸湿部及成纸强度的影响。结果表明,随DCS中Mg2+、Na+、Ca2+浓度增加,电导率显著上升,Zeta电位和滤水性变化不大,阳离子需求量先下降后趋于平稳,留着率缓慢上升;随Al3+浓度递增,电导率先增后减,Zeta电位绝对值减小约70mV,滤水性显著提高,阳离子需求量骤降,甚至由正转负,留着率则先降后升;提取的DCS使电导率骤增,Zeta电位和滤水性下降,阳离子需求量显著增大,且留着率提高。Mg2+对瓦楞原纸强度无明显影响;Na+和Ca2+使环压指数和裂断长先升后降呈波动态势;Al3+加入后,环压指数先上升,当其浓度达0.5%后,开始骤减,裂断长则不断减小;随提取DCS添加量升高,环压指数先增后减,1.5%为拐点,裂断长呈下降趋势。通过模拟白水封闭循环,当循环达30次时,成纸环压指数最大,而裂断长在20次时开始下降。
DCS research on corrugated paper wet paper and paper into the paper strength. The results showed that with the increase of concentration of Mg2 +, Na + and Ca2 + in DCS, the conductivity increased obviously, the change of Zeta potential and water filtration did not change much, the cation demand decreased first and then became steady, the retention rate increased slowly. With the increase of Al3 + concentration, After the first increase and then decrease, the absolute value of Zeta potential decreased by about 70mV, the water filtration significantly increased, the cation demand plummeted, even from positive to negative, then the retention rate decreased first and then increased; Potential and drainage decreased, cation demand increased significantly, and the retention rate increased. Mg2 + had no significant effect on the strength of corrugated paper; the ring pressure index and the fracture length increased first and then fluctuated when Na + and Ca2 + were added; the ring pressure index increased first after Al3 + was added, The length of the rupture decreases continuously. As the amount of DCS added increases, the ring pressure index increases first and then decreases, 1.5% turns inflection point, and the rupture length decreases. By simulating a closed cycle of white water, when the cycle reaches 30 times, the paper ring pressure index is the largest, while the rupture length begins to decrease at 20 times.