Invention Application
- Patent Title: SOUND-ABSORBING MATERIAL
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Application No.: US17600814Application Date: 2020-03-19
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Publication No.: US20220199063A1Publication Date: 2022-06-23
- Inventor: Kunihiko IBAYASHI , Tomoyuki OKAMURA , Hirofumi AIZONO , Takashi OKABE , Masako KOSHIKAWA
- Applicant: ENEOS CORPORATION
- Applicant Address: JP Tokyo
- Assignee: ENEOS CORPORATION
- Current Assignee: ENEOS CORPORATION
- Current Assignee Address: JP Tokyo
- Priority: JP2019-071513 20190403
- International Application: PCT/JP2020/012344 WO 20200319
- Main IPC: G10K11/168
- 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.
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