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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 (JP)
ITO HIDEMI (JP)
Application Number:
JP2019/007271
Publication Date:
September 12, 2019
Filing Date:
February 26, 2019
Export Citation:
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Assignee:
JNC CORP (JP)
JNC FIBERS CORP (JP)
International Classes:
B32B5/26; B32B27/02; G10K11/16; G10K11/168
Domestic Patent References:
WO2019026798A12019-02-07
WO2018143430A12018-08-09
Foreign References:
JP2011110773A2011-06-09
JP2010085873A2010-04-15
JP2004021037A2004-01-22
JP2004019062A2004-01-22
US20130112499A12013-05-09
JP2008537798A2008-09-25
JP2008065046A2008-03-21
JP2019001012A2019-01-10
JP2018169555A2018-11-01
JP2018146942A2018-09-20
JP2018199253A2018-12-20
Attorney, Agent or Firm:
MINORI PATENT PROFESSION CORPORATION (JP)
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