TISSU NON TISSÉ POUR MATÉRIAU INSONORISANT ET MATÉRIAU INSONORISANT UTILISANT LEDIT TISSU

摘要

A nonwoven fabric for sound absorbing application according to the present invention includes a plurality of drawn filaments arranged and oriented in one direction, and the mode value of the diameter distribution of the plurality of drawn filaments is 1 to 4 µm. When laminated on a porous sound absorbing material, the nonwoven fabric for sound absorbing application according to the present invention constitutes a sound absorbing material with the porous sound absorbing material, and the resultant laminated sound absorbing material has improved sound absorption performance in the frequency band of 1000 to 10000 Hz as compared to the porous sound absorbing material alone.