公开(公告)号：US20220199063A1

公开(公告)日：2022-06-23

申请号：US17600814

申请日：2020-03-19

Applicant: ENEOS CORPORATION

Inventor： Kunihiko IBAYASHI ,  Tomoyuki OKAMURA ,  Hirofumi AIZONO ,  Takashi OKABE ,  Masako KOSHIKAWA

IPC: G10K11/168 ,  B32B5/26 ,  D04H1/559

Abstract: The sound absorbing material 50 comprises: a felt-like fiber body 51 which includes 15 to 70% by weight of fine fibers with a fineness of 1 denier or less, 20 to 60% by weight of hollow fibers having inner cavities, and 10 to 40% by weight of binder fibers that join the fibers together; and a nonwoven fabric 52 that is laminated on a surface of the felt-like fiber body 51. The nonwoven fabric 52 includes a plurality of drawn long fibers arranged and oriented in one direction. An average diameter of the plurality of long fibers is in the range of 1 to 4 μm. The sound absorbing material 50 has a thickness in the range of 8 to 45 mm and a bulk density of 20 kg/m3 or less.