阳离子改性滑石粉处理OCC纸浆中胶黏物的研究

研究了阳离子改性滑石粉处理废旧瓦楞纸箱(old corrugated containers,OCC)纸浆胶黏物过程的影响因素和作用机理,同时比较了改性前后滑石粉对胶黏物作用效果的差异。结果表明:在一定的滑石粉用量的条件下,适当的纸浆温度和浓度可以促进改性滑石粉的作用效果,当改性滑石粉用量为1.5%,温度80℃,浆浓为20%(wt)时,胶黏物去除率可达到58%;阳离子型助剂能够使滑石粉表面带正电荷,增大滑石粉的比表面积,促进胶黏物吸附改性滑石粉,形成胶黏物―滑石粉微球,有利于胶黏物黏性降低和去除;由OCC手抄片的纸性检测发现:其作用后纸页的紧度、耐破指数、抗张指数和撕裂指数略有下降。

The OCC Pulp Stickies Treatment with Cationic Modified Talc

It was investigated that the old corrugated containers （OCC） pulp was treated with talc which was modified by cationic agent. The mechanism and affecting factors were evaluated during treatment with modified talc in OCC pulp. The hand-sheet properties were analyzed. The results showed that the temperature and concentration of OCC pulp during treatment with modified talc played important roles. The content of stickies in OCC pulp could be decreased 58% at the following conditions： modified talc dosage 1.5%, temperature at 80℃, and pulp concentration at 20%. It was found that cationic agent could increase the specific surface area and electropositive of modified talc. Stickies could be adsorbed and generated small stickies-talc balls, which could be removed and reduce the stickiness of surface. The properties of hand sheet showed that there was a tiny drop in tightness, tensile index, tear index and burst index.