Studies on influence of bonding methods on sound absorption characteristic of polyester/cotton recycled nonwoven fabrics

Abstract

Acoustic insulation is becoming an important need for industries, automobiles, aircraft application etc.. Noise control study is undertaken in various part of the work to enhance the quality of human life. The recycled textile products in one of the alternative raw material for soundproof nonwoven fabric production at low cost. This paper investigated the sound absorption properties nonwoven fabric made from three different bonded techniques such as thermal bonded, chemical bonded and thermochemical hybrid bonded using recycled cotton and polyester fibres. The investigation was carried out with the sound wave frequencies ranging from 0 Hz to 4000 Hz using impedance tube method. The following results were found that thermochemical hybrid based nonwoven yield higher sound absorption coefficient than other two bonded techniques, higher thickness nonwoven has shown higher sound absorption coefficient, finer fiber invention into the nonwoven increased the sound absorption coefficient due to the low quantities of linked pores formation and air space created behind the sample has increased sound absorption coefficient of the nonwoven samples significantly. Further to that, there was a negative strong correlation was exist between the sound absorption coefficient to air permeability and porosity of all the nonwoven samples. Finally, the results indicated that recycled cotton and polyester fibrous materials could be effectively used as raw material for sound absorbing nonwoven fabric at low cost with eco-friendly manner.