Title:
吸音材
Document Type and Number:
Japanese Patent JP7259076
Kind Code:
B2
Abstract:
[Problem] To have high sound absorption characteristics in a wide frequency range from a medium frequency range to a high frequency range even with a small thickness. [Solution] A sound absorbing material is obtained by imparting a compressive force creating a compressibility in the range of 50-95% to a foam having closed cells and a compressive stress at the time of 25% compression in the range of 2-30 kPa, thereby communicating the cells and forming a cellular structure of the cells communicated by compression and the closed cells, the cellular structure having a specific gravity within the range of 0.08-0.4 and a compressive stress at the time of 25% compression in the range of 2-4.8 kPa.
Inventors:
Makoto Arafuka
Atsushi Otani
Okayama Osamu
Kenji Sugiura
Atsushi Otani
Okayama Osamu
Kenji Sugiura
Application Number:
JP2021556082A
Publication Date:
April 17, 2023
Filing Date:
November 09, 2020
Export Citation:
Assignee:
Aisin Chemical Headquarters Co., Ltd.
International Classes:
G10K11/162; B60R13/08
Domestic Patent References:
| JP2005084606A | ||||
| JP2010094916A | ||||
| JP2004123836A |
Foreign References:
| EP2357292A2 | ||||
| KR100897899B1 |
Attorney, Agent or Firm:
Patent Attorney Corporation Vesta International Patent Office