Invention Grant
- Patent Title: Sound absorbing material
-
Application No.: US16624583Application Date: 2018-06-15
-
Publication No.: US11705098B2Publication Date: 2023-07-18
- Inventor: Kunihiko Ibayashi , Hiroaki Konishi , Muneyuki Shiina , Masahiro Wakayama
- Applicant: Eneos Corporation
- Applicant Address: JP Tokyo
- Assignee: Eneos Corporation
- Current Assignee: Eneos Corporation
- Current Assignee Address: JP Tokyo
- Agency: Lerner David LLP
- Priority: JP 17121674 2017.06.21
- International Application: PCT/JP2018/022954 2018.06.15
- International Announcement: WO2018/235741A 2018.12.27
- Date entered country: 2019-12-19
- Main IPC: B32B5/24
- IPC: B32B5/24 ; G10K11/162 ; B32B5/02 ; G10K11/168 ; B32B5/26 ; B60R13/08

Abstract:
The sound absorbing material according to the present invention is formed by laminating a porous sound absorber and two or more sheets of a nonwoven fabric one on another. The nonwoven fabric has a plurality of drawn filaments arranged and oriented in one direction. The mode value of the diameter distribution of the plurality of filaments is in the range of 1 to 4 μm. The grammage of the nonwoven fabric is in the range of 5 to 40 g/m2. The sound absorbing material according to the present invention provides high sound absorption performance in a predetermined low frequency band of 6000 Hz or less, and still remains light in weight and flexible enough and easy enough to handle to be substantially comparable to the porous sound absorber.
Information query