纤维混合比对针刺滤材孔径及透气性的影响

Effect of Fiber Mixing Ratio on Pore Size and Air Permeabilityof Needled Filter Material

为了研究纤维混合比对针刺过滤材料孔径、孔径分布和透气性的影响规律,以2.22 dtex和6.67 dtex两种细度的聚酯纤维为原料,分别以其0∶100、20∶80、40∶60、60∶40、80∶20、100∶0的比例混合,采用干法针刺非织造技术制备了过滤材料,并对其进行了性能测试分析。结果表明:细纤维占的比例越多,过滤材料的孔径分布越集中,其模态孔径、最大孔径、中值孔径及平均流孔径等都显著降低;随着细纤维比例的增加,模态孔径呈多项式关系下降,其相关系数R^2为0.943 7;而平均流孔径随着细纤维比例的增加呈线性关系下降,其相关系数R^2为0.924 8;随着细度较小的聚酯纤维比例增加,过滤材料透气率呈指数关系下降,其相关系数R^2为0.949 5。

To study the influence of fiber mixing ratio on the pore size,pore size distribution and air permeability of needled filter material,two kinds of polyester fibers with 2.22 dtex and 6.67 dtex fineness were used as raw materials and mixed at a ratio of 0∶100,20∶80,40∶60,60∶40,80∶20 and 100∶0,respectively to prepare the filter material by dry needling technology,and its performance was tested and analyzed.The results show that the more the proportion of fine fibers,the more concentrated the pore size distribution of the filter material.The modal pore size,the maximum pore size,the median pore size and the mean flow pore size are significantly reduced.With the increase of the proportion of fine fibers,the modal pore size decreases in a polynomial relationship,and the correlation coefficient R 2 is 0.9437,while the mean flow pore size decreases linearly with the increase of the proportion of fine fibers,and the correlation coefficient R 2 is 0.9248.With the increase of the proportion of polyester fiber with smaller fineness,the air permeability of the filter material decreases exponentially,and the correlation coefficient R 2 is 0.9495.