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Title:
SOUNDPROOF MATERIAL AND SOUNDPROOF MATERIAL PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2020/110488
Kind Code:
A1
Abstract:
A soundproof material 1 is provided with: a first layer 10 formed of a polyurethane foam; a second layer 20 which is laminated on a first-side surface of the first layer and formed of a sheet-shaped member made of a material other than polyurethane; and a third layer 30 which is laminated on a first-side surface of the second layer, is formed of a polyurethane foam, and has a higher density over the entire layer than the density of at least a part of the first layer.

Inventors:
YAMANAKA YUSUKE (JP)
Application Number:
PCT/JP2019/040480
Publication Date:
June 04, 2020
Filing Date:
October 15, 2019
Export Citation:
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Assignee:
BRIDGESTONE CORP (JP)
International Classes:
G10K11/168; B29C44/00; B29C44/06; B32B27/40; E01B19/00; E01F8/00; G10K11/16; B29L9/00; B60R13/08
Domestic Patent References:
WO2017159646A12017-09-21
Foreign References:
JP2017222873A2017-12-21
JP2018022665A2018-02-08
JP2006316788A2006-11-24
JP2000007591A2000-01-11
Other References:
See also references of EP 3889955A4
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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