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Title:
LAMINATED ACOUSTIC ABSORPTION MEMBER
Document Type and Number:
WIPO Patent Application WO/2019/026798
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a thin acoustic absorption member that exhibits exceptional sound absorption properties in a low-frequency range, an intermediate-frequency range, and a high-frequency range. A laminated acoustic absorption member including a plurality of fiber layers and a base material layer positioned between the fiber layers, wherein the laminated acoustic absorption member is characterized in that: the laminated acoustic absorption member includes at least two fiber layers; the fiber layers comprise fibers having an average fiber diameter of at least 500 nm and less than 35 μm, and have a basis weight of 10-500 g/m2, a ventilation rate of 950 μm/Pa·s or less, and a thickness of less than 2.9 mm; and the base material layer is at least one selected from the group consisting of non-woven fabrics and woven fabrics, and has a basis weight of 80 g/m2 to 800 g/m2 and a thickness of 2.9 mm to 20 mm.

Inventors:
HATTORI Takayuki (FIBER RESEARCH CENTER 230, Kawata-cho, Moriyama-sh, Shiga 01, 〒5240001, JP)
NISHIJIMA Masaru (FIBER RESEARCH CENTER 230, Kawata-cho, Moriyama-sh, Shiga 01, 〒5240001, JP)
Application Number:
JP2018/028291
Publication Date:
February 07, 2019
Filing Date:
July 27, 2018
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
Domestic Patent References:
WO2016143857A12016-09-15
Foreign References:
JP2006028708A2006-02-02
JP2009000843A2009-01-08
JP2005266445A2005-09-29
JP2009512578A2009-03-26
JP2017081040A2017-05-18
JP2016142831A2016-08-08
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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