烟用废弃滤棒中二醋酸纤维的回收与再利用初探

Preliminary study on recycling and reuse of diacetate fibers in waste cigarette filter

以烟用废弃滤棒中二醋酸纤维为原料,以醇碱溶液作为三乙酸甘油酯的脱除剂,回收得到脱酯二醋酸纤维;再掺配木浆纤维,利用湿法成网工艺制备非织造材料;测试并分析非织造材料的孔径分布及拉伸性能。结果表明:回收得到的脱酯二醋酸纤维满足湿法成网工艺要求;制备的纯脱酯二醋酸纤维湿法非织造材料的孔径分布呈单峰状,平均孔径为18.104μm,孔隙率为72.272%,断裂强力为6.8 N,断裂伸长率为8.481%;木浆纤维的掺入可改善纯脱酯二醋酸纤维湿法非织造材料的孔隙结构,且当木浆纤维/脱酯二醋酸纤维的质量配比为40/60时,非织造材料的平均孔径最小,孔隙率最大,断裂强力为8.0 N,断裂伸长率为3.860%,更适合用作烟用滤棒的材料。

Taking diacetate fibers in waste cigarette filter as raw materials,de-ester diacetate fibers were recycled by using alkali-alcohol solution as removing agent of glyceryl triacetate. And then wood pulp fibers were blended into de-ester diacetate fibers to prepare nonwovens by wet-laid process. The pore size distribution and tensile performance of nonwovens were tested and analyzed. The results showed that, the recycled de-ester diacetate fibers could meet the requirement of wet-laid process. The pore size distribution of the pure de-ester diacetate wet-laid nonwovens appeared a single peak shape, the mean pore size was 18.104 μm, the porosity was 72.272%, the breaking strength was 6.8 N and the breaking elongation was 8.481%. The blending of wood pulp fibers could improve the pore structure of the de-ester diacetate wet-laid nonwovens. When the weight ratio of wood fibers/de-ester diacetate fibers was40/60,the nonwovens’ average pore size was the smallest,the porosity was the largest,the breaking strength was 8. 0 N and the breaking elongation was 3. 860%, which was more suitable for cigarette filter.