Invention Grant
- Patent Title: Sound-absorbing material
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Application No.: US17283251Application Date: 2019-11-14
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Publication No.: US11932178B2Publication Date: 2024-03-19
- Inventor: Takanori Kawai , Tomoki Mabuchi
- Applicant: IBIDEN CO., LTD. , TOYOTA JIDOSHA KABUSHIKI KAISHA
- Applicant Address: JP Ogaki
- Assignee: IBIDEN CO., LTD.,TOYOTA JIDOSHA KABUSHIKI KAISHA
- Current Assignee: IBIDEN CO., LTD.,TOYOTA JIDOSHA KABUSHIKI KAISHA
- Current Assignee Address: JP Ogaki; JP Toyota
- Agency: MORI & WARD, LLP
- Priority: JP 18215650 2018.11.16
- International Application: PCT/JP2019/044680 2019.11.14
- International Announcement: WO2020/100974A 2020.05.22
- Date entered country: 2021-04-07
- Main IPC: B60R13/08
- IPC: B60R13/08 ; B32B3/26 ; B32B5/02 ; B32B5/26 ; F02B77/13 ; G10K11/168

Abstract:
The present invention provides a sound-absorbing material having sound absorption performance with an average sound absorption coefficient of 0.70 or more in the frequency range of 800 to 5000 Hz. The present invention provides a sound-absorbing material including: a fiber layer including a plurality of holes open to a surface thereof and having a thickness of 3 mm or more; and an inorganic material layer mainly containing a calcium-based material and having a thickness of 0.4 to 0.6 mm on the surface of the fiber layer, the holes being blind holes each penetrating through the inorganic material layer and having a bottom inside the fiber layer, each hole having a depth corresponding to 50 to 90% of the thickness of the fiber layer.
Public/Granted literature
- US20210339687A1 SOUND-ABSORBING MATERIAL Public/Granted day:2021-11-04
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