Title:
SOUND ABSORPTION MEMBER, VEHICLE COMPONENT, AUTOMOBILE, AND PRODUCTION METHOD FOR SOUND ABSORPTION MEMBER
Document Type and Number:
WIPO Patent Application WO/2019/021480
Kind Code:
A1
Abstract:
A sound absorption member that has a Helmholtz resonance structure that comprises: inlet passages that open at the surface; and hollow parts that are connected to the outside by the inlet passages. The sound absorption member is characterized by comprising an upper layer, a lower layer that is laminated on the upper layer, and an adhesive layer that bonds the upper layer and the lower layer, the upper layer comprising a board material that is formed from foam and does not have continuous holes and being provided with columnar first through holes that form the inlet passages, and the lower layer being provided with the hollow parts. The sound absorption member is also characterized in that the compressive stress σ thereof as measured in the thickness direction in accordance with JIS K7181(2011) at a portion thereof at which there is no Helmholtz resonance structure is 0.1–200 MPa.
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Inventors:
FURUZAWA HIDEKI (JP)
SAKAGUCHI HIROSHI (JP)
NISHIKAWA TOMOHIRO (JP)
NOMURA TOSHIHIRO (JP)
SAKAGUCHI HIROSHI (JP)
NISHIKAWA TOMOHIRO (JP)
NOMURA TOSHIHIRO (JP)
Application Number:
PCT/JP2017/027545
Publication Date:
January 31, 2019
Filing Date:
July 28, 2017
Export Citation:
Assignee:
IBIDEN CO LTD (JP)
International Classes:
G10K11/172; B60R13/08; G10K11/16; G10K11/168
Foreign References:
| JPS5952299A | 1984-03-26 | |||
| JP2012255967A | 2012-12-27 | |||
| JPH1039875A | 1998-02-13 |
Attorney, Agent or Firm:
YASUTOMI & ASSOCIATES (JP)
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