Abstract: In order to investigate the surface morphology of web, morphological structure and mechanical properties of the composite filter materials of different PPS fibers weight percentage, after mixing basalt fibers with PPS fibers by different weight percentages, the opening, carding, cross lapping, pre-needling and needling process were used to prepare the composite filter materials, at the same time, their properties were characterized by stereo microscope, SEM, and electronic fabric tensile tester, respectively. The results showed that the degree of single fiber and fiber arrangement disordered increased, the web uniformity was improved, the entanglement between fibers and fibers, fibers and base fabric in composite filter materials enhanced by adding PPS fibers. The breaking strength of filter materials raised significantly both in cross-direction (CD) and machine-direction (MD), and the breaking strength of filter materials with 30%wt PPS fibers were 2.5 times as much as the pure basalt filter materials in MD.

Key words: basalt fiber, PPS fiber, needle-punched, composite filter material, mechanical property