Title:
SOUND-ABSORBING MATERIAL
Document Type and Number:
WIPO Patent Application WO/2020/203357
Kind Code:
A1
Abstract:
This sound-absorbing material 50 comprises: a felt-like fiber body 51 containing 15 to 70% by weight of a fine fiber having a fineness of one denier or less, 20 to 60% by weight of a hollow fiber having a cavity in the interior thereof, and 10 to 40% by weight of a binder fiber binding the fibers to one another; and a non-woven fabric 52 layered on the surface of the felt-like fiber body 51. The non-woven fabric 52 contains a plurality of long fibers that have been stretched and arranged along one direction, the mean fiber diameter for the plurality of long fibers being 1 to 4 μm. In addition, the thickness of the sound-absorbing material 50 is 8 to 45 mm, and the bulk density of the sound-absorbing material 50 is 20 kg/m3 or lower.
Inventors:
IBAYASHI KUNIHIKO (JP)
OKAMURA TOMOYUKI (JP)
AIZONO HIROFUMI (JP)
OKABE TAKASHI (JP)
KOSHIKAWA MASAKO (JP)
OKAMURA TOMOYUKI (JP)
AIZONO HIROFUMI (JP)
OKABE TAKASHI (JP)
KOSHIKAWA MASAKO (JP)
Application Number:
PCT/JP2020/012344
Publication Date:
October 08, 2020
Filing Date:
March 19, 2020
Export Citation:
Assignee:
JXTG NIPPON OIL & ENERGY CORP (JP)
International Classes:
B32B5/26; D04H1/559; G10K11/168
Domestic Patent References:
| WO2015025531A1 | 2015-02-26 |
Foreign References:
| JP2018092131A | 2018-06-14 | |||
| JP2014122480A | 2014-07-03 | |||
| JP2011246839A | 2011-12-08 | |||
| JP2000334867A | 2000-12-05 |
Attorney, Agent or Firm:
OGAWA, Moriaki et al. (JP)
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