Title:
SOUND-ABSORBING MATERIAL
Document Type and Number:
WIPO Patent Application WO/2016/103646
Kind Code:
A1
Abstract:
The sound-absorbing material according to the present invention comprises a nonwoven-fabric structure including a fibrous object made up of entangled fibers. The fibers include nanofibers which are constituted of polypropylene and have a fiber diameter smaller than 1 µm. The fibrous object has a thickness of 20-36 mm. The fibrous object has a fiber density of 10 kg/m3 or higher but less than 50 kg/m3, and the content of the nanofibers in the fibrous object is 0.5 or higher in terms of ratio by mass. The sound-absorbing material has a sound absorption coefficient for 1-kHz sound of 0.59-0.84 and a sound absorption coefficient for 6-kHz sound of 0.80-0.96.
Inventors:
TANI NAOYUKI
NAKASHIMA YU
FUJISAWA TORU
NAGINO TOSHIFUMI
HATANAKA MOTOI
NAKASHIMA YU
FUJISAWA TORU
NAGINO TOSHIFUMI
HATANAKA MOTOI
Application Number:
PCT/JP2015/006267
Publication Date:
June 30, 2016
Filing Date:
December 16, 2015
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
D04H1/4382; B32B5/02; B32B5/24; B32B5/26; D04H1/4291; G10K11/162
Foreign References:
| US20130115837A1 | 2013-05-09 | |||
| JP2013147771A | 2013-08-01 | |||
| JP5503816B1 | 2014-05-28 | |||
| JP2014015042A | 2014-01-30 | |||
| JPH06259081A | 1994-09-16 |
Attorney, Agent or Firm:
WASHIDA, KIMIHITO (JP)
Koichi Washida (JP)
Koichi Washida (JP)
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