Title:
積層吸音材
Document Type and Number:
Japanese Patent JP6660035
Kind Code:
B2
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:
Takayuki Hattori
Hidemi Ito
Hidemi Ito
Application Number:
JP2018042044A
Publication Date:
March 04, 2020
Filing Date:
March 08, 2018
Export Citation:
Assignee:
JNC Corporation
JNC Fibers Co., Ltd.
JNC Fibers Co., Ltd.
International Classes:
B32B5/26; B32B27/02; G10K11/16; G10K11/168
Domestic Patent References:
| JP2011110773A | ||||
| JP2010085873A | ||||
| JP2004021037A | ||||
| JP2004019062A | ||||
| JP2008537798A | ||||
| JP2008065046A | ||||
| JP2019001012A | ||||
| JP2018169555A | ||||
| JP2018146942A | ||||
| JP2018199253A |
Foreign References:
| US20130112499 | ||||
| WO2019026798A1 | ||||
| WO2018143430A1 | ||||
| WO2019124186A1 |
Attorney, Agent or Firm:
Patent Business Corporation Minori Patent Office