Title:
SOUND ABSORBING MATERIAL
Document Type and Number:
WIPO Patent Application WO/2018/235741
Kind Code:
A1
Abstract:
This sound absorbing material is configured by laminating a porous sound absorbing body and two or more nonwoven fabric sheets; each of the nonwoven fabric sheets comprises a plurality of filaments that are stretched and arranged in one direction; the fiber diameter distribution of the plurality of filaments has a mode at 1-4 μm; and the weight per square meter of the nonwoven fabric sheets is 5-40 g/m2. This sound absorbing material is able to exhibit high sound absorption performance in a specific low frequency band of 6,000 Hz or less without substantially impairing lightness, flexibility, handling properties and the like of the porous sound absorbing material.
Inventors:
IBAYASHI KUNIHIKO (JP)
KONISHI HIROAKI (JP)
SHIINA MUNEYUKI (JP)
WAKAYAMA MASAHIRO (JP)
KONISHI HIROAKI (JP)
SHIINA MUNEYUKI (JP)
WAKAYAMA MASAHIRO (JP)
Application Number:
PCT/JP2018/022954
Publication Date:
December 27, 2018
Filing Date:
June 15, 2018
Export Citation:
Assignee:
JXTG NIPPON OIL & ENERGY CORP (JP)
International Classes:
B32B5/24; D04H3/04; B60R13/08; E04B1/86
Domestic Patent References:
| WO2018097326A1 | 2018-05-31 |
Foreign References:
| JP2002069824A | 2002-03-08 | |||
| JPH10203268A | 1998-08-04 | |||
| JP2010128005A | 2010-06-10 | |||
| JP2007334285A | 2007-12-27 | |||
| JP2000334867A | 2000-12-05 | |||
| JPH10240269A | 1998-09-11 | |||
| JP2009275801A | 2009-11-26 | |||
| JP2011246839A | 2011-12-08 |
Attorney, Agent or Firm:
OGAWA, Moriaki et al. (JP)
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