| abstract |
(57) [Summary] [Object] To obtain a sound absorbing material which is recyclable, has excellent sound absorbing properties in an audible frequency band, and has antibacterial properties, which is used for a sound insulating wall of a vehicle, a house, or a highway. A sound-absorbing material comprising at least two kinds of fibers made of the same polymer, wherein one of the constituent fibers The seed is a thermoplastic polymer R1 whose melting point is lower than the melting points of other fibers. A, which substantially adheres to each other between the fibers A and at some of the contact points between the fibers A and other fibers, and wherein the constituent fibers are random in a plane parallel to the surface of the sound absorbing material. A sound absorbing material characterized by being arranged in a direction. |