Nonwoven fabric for acoustic applications with increased sound absorption properties

摘要

The invention relates to a nonwoven fabric for acoustic applications with increased sound absorption properties, consisting of a longitudinal or cross-laid, in particular preconsolidated plastic fiber material having a basis weight of 20 g / m2 to 100 g / m2, preferably 30 g / m2 to 80 g / m2. According to the invention are used in the equipment as a filler unexpanded micro hollow body in a proportion of 0.2 wt .-% to 4 wt .-%, using as binders, a high molecular weight polyester material for fixing the micro hollow body to the nonwoven fibers and to increase the stiffness and tear strength Application comes. During drying, the micro hollow bodies expand, as a result of which the pores of the fleece are closed, resulting in increased sound absorption.