The properties of glass fiber composite filters prepared by two different processes, spunlaced process and needle process,were tested and compared. The results show that the spunlaced process can reduce the damage to glass fibers. Spunlaced glass fiber composite filters have low stiffness, good folding performance, and can reduce the use of fiber raw materials. In terms of filtration performance, the residual resistance of spunlaced glass fiber composite filters is lower than that of needled glass fiber composite filters, and the filtration efficiency is higher than that of needled filters.
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