Development of Sound Absorbing Recycled Nonwoven Composite Materials

Abstract

Abstract The Sound absorbent textile materials, especially nonwoven composite structure of reclaimed materials which have low manufacturing costs, low relative density and are more attractive. In this research the use of reclaimed cotton and polyester fiber for production of sound absorption nonwoven composite materials has been investigated. Three different blend ratios of reclaimed cotton and polyester fibers that is 25:75, 40:60 and 50:50 have been used. The reclaimed cotton and polyester nonwoven composites are specified for their physical properties, such as thickness, areal density, bulk density, porosity and sound absorption characteristics in the frequency range of 250HZ-2KHZ. The values of the sound absorption coefficient and noise reduction coefficient acquired signifies that the reclaimed polyester fiber nonwoven composite holds excellent sound absorption behavior in the entire frequency range. Before compressed reclaimed cotton/polyester nonwoven composite of 25:75 blend ratios with greater bulk density and lower porosity is seen to give excellent performance while using the provided air gap behind the reclaimed cotton/polyester nonwoven composites.