不锈钢纤维牵伸条的线密度对气流成网均匀性的影响

Effect of Linear Density of Stainless Steel Fiber Drafting Slivers on the Uniformity of Air-laid Web

金属纤网的均匀性影响金属纤维毡的使用寿命、强度、折波性、过滤性和透气性等。因此,研究金属纤网的均匀性对提高金属纤维烧结毡的性能具有重要意义。文章以丝径为8、12和22μm的316L不锈钢纤维为研究对象,探究了其牵伸条的线密度对气流成网均匀性的影响。采用取样称重-计算变异系数法测定了纤网的均匀性。当316L 8、12、22μm不锈钢纤维牵伸条的线密度分别为7610、12360、14520 tex时,气流铺制纤网的均匀性较好。将8、12、22μm铺制最均匀的纤网叠配在一起可以烧结制备出均匀性较好的金属纤维烧结毡,其透气度的CV值仅为2.12%、泡点压力的CV值仅为2.95%。文章对指导气流成网技术在金属纤维烧结毡的实际生产中具有重要意义。

The uniformity of the metal fiber web has a direct effect on the uniformity of the metal fiber sintered felt,which affects its service life,strength,folding property,filtration and air permeability.Therefore,studying the uniformity of metal fiber web is of great significance for improving the performance of metal fiber sintered felt.The paper takes 316L stainless steel fibers with wire diameters of 8μm,12μm,and 22μm as the research object,and explores the effect of the linear density of the drafting slivers on the uniformity of air-laid web.The uniformity of the web was determined by sampling weighing-calculated coefficient of variation method.When the linear densities of the 316L 8μm,12μm,and 22μm stainless steel fiber drafting slivers were 7610 tex,12360 tex,and 14520 tex,respectively,the uniformity of the air-laid web is good.The most uniform fiber webs of 8μm,12μm,and 22μm can be laminated together to prepare a metal fiber sintered felt with good uniformity,its CV value of air permeability is only 2.12%,and CV value of bubble point pressure is only 2.95%.This paper is of great significance in guiding the air-laid technology in the actual production of metal fiber sintered felt.