羧甲基纤维素钠作OCC废纸浆手抄片表面施胶增强剂研究

Sodium Carboxymethyl Cellulose as Surface Sizing Enhancer for OCC Pulp Hand Sheets

瓦楞原纸与箱纸板生产原材料几乎来自于回收的废旧纸箱(Old Corrugated Container,OCC),因此废纸制浆在我国造纸行业中有着不可或缺的重要地位。而在纤维多次回收的过程中,纤维品质逐渐下降,对纸与纸板的应用性能造成重大影响。为克服旧瓦楞箱纸板纤维劣质化,通过使用羧甲基纤维素钠(CMC)对OCC浆手抄片进行表面处理,并对其增强性能进行了考察。结果表明,CMC能够显著改善手抄片的强度性能,与空白样相比,当CMC施胶量为6%时(基于手抄片的质量),手抄片的抗张指数和伸长率分别提高了75.24%和45.57%,环压指数和撕裂指数分别提高了29.54%和9.33%,耐折度为空白样的5.75倍,挺度指数为空白样的3.26倍。CMC增强了手抄片纤维间的结合强度,实现了OCC废纸浆手抄片的增强和增挺。

The raw materials of the production of corrugated base paper and containerboard paper almost come from recycled waste cartons,so waste paper pulp has an indispensable and important position in China’ s paper industry.In the process of multiple fiber recycling,the quality of the fiber gradually declines,which has a significant impact on the application performance of paper and cardboard.In this study,to overcome the inferiority of OCC fibers,the surface sizing of OCC hand sheets was applied using CMC as sizing agent.The results showed that CMC could significantly improve the strength properties of the OCC hand sheets.Compared with the blank samples,when the CMC sizing amount reached 6%,the tensile index,elongation,rig pressure index,and tear index were increased by 75.24%,45.57%,29.54,and 9.33% respectively.Additionally,the folding resistance and stiffness index was 5.75and 3.26 times than that of blank samples.In general,CMC could enhance the binding strength between the waste OCC fibers and realized the enhancement and stiffening the waste OCC hand sheets.