Sound-absorbing,Decorative,Flame retardant,Light weight: 229kg/m3, 2.07kg/m2. 1. FeaturePolyester fiber acoustic board ... .5) can be directly used for interior decoration.6) Light weight: 229kg/m3, 2.07kg/m2.7) Easy of processing, ... material. By stick, drilling, planing, nailing and other basic operations will be able to achieve arbitrary sound-absorbing and decorative effect to reduce the overall ...