Akademik Veri Yönetim Sistemi
FIBERS AND POLYMERS, cilt.16, sa.4, ss.941-948, 2015 (SCI-Expanded)
Growing interest in sound absorbing materials in industrial applications is their maximized low frequency properties. This research focused on improvement of sound absorption characteristics of layered nonwoven composites. Two different nonwoven structures as polyester and polyester/polyamide blend, were selected as top layer of the bilayered structure. Combinations of a control top layer and a variety of base layers were tested for their sound absorption properties and the effect of using; 1) polyester or 2) polyester/polyamide top layer was investigated. Development of composites with microfibrous layer of 70 %Polyester/30 %Polyamide fibers backed with either of 70 %woo1/30 %bi-component polyester, 70 %Cotton/30 %Polyester or 70 % equivalent blend of acrylic, cotton, polyester and 30 % polypropylene nonwoven fibers, provided exceptional sound absorption properties at low frequencies. Macrofibrous layer of polyester fibers backed with 70 %woo1/30 %bi-component polyester fibers improved sound absorption properties at all frequency ranges.