Abstract: In this paper, PET/PP and feather fibers/PP scattered composite melt-blown material were made by scattered composite melt-blown process, respectively. The influences of the thickness, basis density and average fiber diameter on the sound-absorbing property of the materials were studied. It is found that the sound absorption coefficient increases with the increase of the thickness. The influence of basis density on the absorption coefficient is not as obvious as the thickness. The average melt-blown fiber diameter in 1.7~2.4μm has no obvious impact on the absorption coefficient. In addition, the sound-absorbing material made by 3M and the traditional waste fiber sound-absorbing material were selected to compare the sound-absorbing property. It indicates that the sound-absorbing coefficient of PET/PP scattered composite melt-blown sound-absorbing material is similar to 3M Company's product, which is better than the traditional waste fiber sound-absorbing material and feather fibers/PP scattered composite melt-blown nonwoven material

Key words: scattered composite, melt-blown, sound-absorbing material, sound absorption coefficient