SOUND ABSORBING MATERIAL, SOUND ABSORPTION PERFORMANCE IMPROVING MEMBER, AND VEHICLE MEMBER

Title:

SOUND ABSORBING MATERIAL, SOUND ABSORPTION PERFORMANCE IMPROVING MEMBER, AND VEHICLE MEMBER

Document Type and Number:

WIPO Patent Application WO/2021/182468

Kind Code:

A1

Abstract:

A sound absorbing material which sequentially comprises a resin film, a first base material layer having a communicating pore, and a second base material layer having a communicating pore in this order, wherein the density of the first base material layer is lower than the density of the second base material layer.

Inventors:

TAKAYASU SATOSHI (JP)
YOKOKURA AI (JP)
KOTAKE TOMOHIKO (JP)

Application Number:

PCT/JP2021/009286

Publication Date:

September 16, 2021

Filing Date:

March 09, 2021

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Assignee:

SHOWA DENKO MATERIALS CO LTD (JP)

International Classes:

B32B5/18; B32B3/24; B32B7/12; B32B15/08; B32B27/06; D04H1/4374; G10K11/168

Foreign References:

JP2002215169A	2002-07-31
JP2007086505A	2007-04-05

Attorney, Agent or Firm:

HASEGAWA Yoshiki et al. (JP)

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