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Patent Searching and Data


Title:
LAMINATED ACOUSTIC ABSORPTION MEMBER
Document Type and Number:
WIPO Patent Application WO/2019/172016
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing an acoustic absorption member that exhibits exceptional sound absorption properties from a low-frequency range to an ultra-high-frequency range. A laminated acoustic absorption member that includes at least a first fiber layer and a second fiber layer, as well as at least one substrate layer present between the first fiber layer and the second fiber layer, wherein: the first fiber layer has an average flow pore diameter of 0.5-10 μm and a basis weight of 0.1-200 g/m2; the second fiber layer has an average flow pore diameter of 0.5-10 μm, the average flow pore diameter of the second fiber layer being equal to or less than that of the first fiber layer, and also has a basis weight of 0.1-200 g/m2; the substrate layer has an air permeability of 40 cc/cm2⋅s or greater as measured by the Frazier method, and a basis weight of 1-700 g/m2; and the first fiber layer and the second fiber layer are disposed on a sound-incidence side and a sound-transmission side, respectively.

Inventors:
HATTORI Takayuki (FIBER RESEARCH CENTER 230, Kawata-cho, Moriyama-sh, Shiga 01, 〒5240001, JP)
ITO Hidemi (FIBER RESEARCH CENTER 230, Kawata-cho, Moriyama-sh, Shiga 01, 〒5240001, JP)
Application Number:
JP2019/007271
Publication Date:
September 12, 2019
Filing Date:
February 26, 2019
Export Citation:
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Assignee:
JNC CORPORATION (2-1 Otemachi 2-chome, Chiyoda-ku Tokyo, 05, 〒1008105, JP)
JNC FIBERS CORPORATION (2-1 Otemachi 2-chome, Chiyoda-ku Tokyo, 04, 〒1000004, JP)
International Classes:
B32B5/26; B32B27/02; G10K11/16; G10K11/168
Attorney, Agent or Firm:
MINORI PATENT PROFESSION CORPORATION (Chiyoda Seimei Kyoto Oike Bldg. 8F, 200 Takamiya-cho, Oike-dori Takakura Nishi-iru, Nakagyo-ku, Kyoto-sh, Kyoto 35, 〒6040835, JP)
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