The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 31, 2024
Filed:
May. 18, 2021
Asahi Kasei Kabushiki Kaisha, Tokyo, JP;
Shinya Yamamuro, Tokyo, JP;
Chie Okamura, Tokyo, JP;
Yasuo Nakanishi, Tokyo, JP;
Takashi Komatsu, Tokyo, JP;
Eiji Shiota, Tokyo, JP;
Mitsui Chemicals Asahi Life Materials Co., Ltd., Tokyo, JP;
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 on the outermost layer, wherein the composite sound-absorbing material is characterized in that the ratio (skin material:base material) of the surface area (m/m) per unit area of the skin material and the surface area (m/m) per unit area of the base material is at least 1:5 and less than 1:40.