Title:
COMPOSITE SOUND-ABSORBING MATERIAL
Document Type and Number:
WIPO Patent Application WO/2021/235446
Kind Code:
A1
Abstract:
Provided is a composite sound-absorbing material that can exhibit sound absorption properties in a broad range of low frequencies, intermediate frequencies, and high frequencies even in a low-basis-weight region having low thickness. The composite sound-absorbing material according to the present invention is configured from two or more layers including a base material and a skin material, the skin material being positioned an the outermost layer, wherein the composite sound-absorbing material is characterized in that the ratio (skin material:base material) of the surface area (m2/m2) per unit area of the skin material and the surface area (m2/m2) per unit area of the base material is at least 1:5 and less than 1:40.
Inventors:
YAMAMURO SHINYA (JP)
OKAMURA CHIE (JP)
NAKANISHI YASUO (JP)
KOMATSU TAKASHI (JP)
SHIOTA EIJI (JP)
OKAMURA CHIE (JP)
NAKANISHI YASUO (JP)
KOMATSU TAKASHI (JP)
SHIOTA EIJI (JP)
Application Number:
PCT/JP2021/018842
Publication Date:
November 25, 2021
Filing Date:
May 18, 2021
Export Citation:
Assignee:
ASAHI CHEMICAL IND (JP)
International Classes:
B32B5/24; D04H1/54; G10K11/168
Domestic Patent References:
| WO2019124231A1 | 2019-06-27 | |||
| WO2019172016A1 | 2019-09-12 |
Foreign References:
| JP2006098890A | 2006-04-13 | |||
| JP2015121631A | 2015-07-02 | |||
| JP2006028708A | 2006-02-02 | |||
| JP2002161464A | 2002-06-04 |
Other References:
See also references of EP 4155071A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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