Mechanical, Acoustic and Flame-Retarding Properties of Sound Absorbent/Flame Retardant Composite Nonwoven Fabrics: Effects of Needle Punching and Hot Pressing

Abstract

Regular nonwoven sound absorbing materials are short of flame retardant properties, and this study aims to produce nonwoven fabrics with sound absorption and flame resistance. Flame retardant polyester (PET) fibers are made into matrices. These matrices are combined with low melting point polyester (LPET) fibers via needle punching in order to form sound-absorbing/flame-retarding composite nonwoven fabrics. The tensile strength, bursting strength, sound absorption, and limited oxygen index (LOI) measurements are then used to evaluate the composite nonwoven fabrics, thereby examining the optimal parameters. Using an LPET matrix as the interlay and being hot pressed, the composite nonwoven fabrics have the maximum sound absorption due to the interior pore structure is improved. *