Design of Nonwoven Carpets to Upgrade Sound Isolation Features in Automobiles

Abstract

With the increases of the expected properties of textile products, better and advanced new designs are being created. Textiles used in vehicles are increasing, and the current performance of the expectations bar is determined by automobile manufacturers. While meeting the expectations of users in the vehicle mechanically, but also disturbing the user during operation of the mechanical properties of this ratio should be minimized. This study was intended to minimize sound transmission of nonwoven textile components, which are used in cars as silencer parts. For that purpose, four different models were developed in this study. First model consists of three designs for baggage carpets. Second model has six designs for floor coverings. Third model comprises two designs inner dash felt and finally fourth model includes two designs of hood liners. The acoustical absorption coefficients and transmission loss of these carpets were tested and evaluated in the frequency range of 16-6300 Hz. The measurements demonstrated that nonwoven layer is a very significant and effective part of a carpet due to its contribution in the sound isolation. With this study, it has been determined which layer has better performance on sound absorption and transmission loss among different carpet types. A combination of heavy layer and nonwoven layer carpets is found to be benefit for noise and sound insulation.

Finite element modelling of the elastic and dynamic behaviour of nonwoven flax/polypropylene composite

“…Nonwoven natural fibre-reinforced composites are widely used in several applications such as the automotive industry, especially for car interior parts. [1][2][3][4][5] This growing interest to these composite materials has motivated many research works to experimentally investigate their static and dynamic behaviours. [6][7][8][9][10][11][12][13] Several studies have investigated the static mechanical behaviour of nonwoven natural fibre-reinforced composites such as Mieck et al 6 and Andre et al 7 These two works have been interested in flax/PP and kenaf/epoxy needle punched nonwovens, respectively.…”

Analysis of the effect of production parameters on sound absorption and abrasion resistance performance of needlepunched nonwovens for automotive carpet applications using Taguchi method

“…The changes in SACs after these additional processes were also analyzed. Although latex back coating is a conventional method applied to needlepunched carpets for improving stability, there are limited studies [20,21] reporting on the sound absorption performance of latex back coated needlepunched nonwovens. In the light of Taguchi approach, the sample showing the highest SAC at a mid-frequency of 2000 Hz and the lowest fiber loss percentage was determined and suggested to be used as a potential carpet facing nonwoven material for automotive industry.…”

An Optimization Study on Sound Insulation Property of Ethylene Vinyl Acetate/Hematite Coated Nonwovens

“…On the other hand, sound barriers such as loaded plastics and highly filled rubbers/elastomers prevent sound from traveling from one place to another . In addition to the alone usage of nonwoven fabrics and inorganic filled polymers, they can also be used in combination, in which they are put together by coating or lamination .…”