Composition for sound insulating sheet member, sound insulating sheet member, and sound insulating structure body

Patent metadata

Field	Value
Publication number	US-2024042742-A1
Application number	US-202318380508-A
Country	US
Kind code	A1
Filing date	Oct 16, 2023
Priority date	Apr 27, 2018
Publication date	Feb 8, 2024
Grant date	—

Abstract

A structural body including a plurality of convex-shaped rubber-elastic resonant portions, and a sheet-like support that supports the resonant portions. A specific gravity of the resonant portions is 1.0 g/cm 3 or more and 3.0 g/cm 3 or less, a height of the resonant portions is from 50 μm to 100 mm, and an areal density of the support is 1.0 kg/m 2 or less.

First claim

What is claimed is:

1 . A structural body comprising:
a plurality of convex-shaped rubber-elastic resonant portions; and a sheet-like support that supports the resonant portions, wherein a specific gravity of the resonant portions is 1.0 g/cm 3 or more and 3.0 g/cm 3 or less, a height of the resonant portions is from 50 μm to 100 mm, and an areal density of the support is 1.0 kg/m 2 or less.

2 . The structural body according to claim 1 , comprising a sheet member including the resonant portions and a rubber-elastic sheet portion on which the resonant portions are provided, wherein
the sheet member is layered on the support.

3 . The structural body according to claim 2 , wherein the sheet member is integrally molded.

4 . The structural body according to claim 1 , wherein the resonant portions have a storage modulus G′ obtained from a composite curve of dynamic viscoelasticity according to ISO 6721-4 of 1 MPa or more at 25° C. and 10 kHz.

5 . The structural body according to claim 1 , wherein the resonant portions have a peak temperature of tan δ obtained by dynamic viscoelasticity measurement according to ISO 6721-4 of 20° C. or less at 1 Hz.

6 . The structural body according to claim 1 , wherein the resonant portions have a tensile elongation at break at a tensile speed of 5 mm/min of 30% or more in accordance with ISO 527.

7 . The structural body according to claim 1 , wherein the resonant portions have a storage modulus G′ obtained from a composite curve of dynamic viscoelasticity according to ISO 6721-4 of 80 MPa or less at 25° C. and 5 kHz.

8 . The structural body according to claim 1 , wherein the resonant portions include a photo-curable resin.

9 . The structural body according to claim 1 , wherein the specific gravity of the resonant portions is uniform.

10 . The structural body according to claim 2 , wherein a height of the sheet member is from 50 μm to 10 mm.

11 . The structural body according to claim 1 , wherein the resonant portions have a configuration of a single structure body.

12 . The structural body according to claim 1 , wherein the resonant portions have a storage modulus G′ obtained from a composite curve of dynamic viscoelasticity according to ISO 6721-4 of less than 4500 MPa at 25° C. and 10 kHz.

Assignees

• Mitsubishi Chem Corp

Inventors

• Koshitouge Haruki
• Okuno Daichi

Classifications

• G10K11/162

  Selection of materials · CPC title

• G10K11/172 Primary

  using resonance effects · CPC title

• B32B25/08 Primary

  of synthetic resin · CPC title

• B32B3/30

  characterised by a layer formed with recesses or projections, e.g. {hollows, grooves, protuberances, ribs (apertured layer B32B3/266; layer with cavities or internal voids B32B3/26)} · CPC title

• E04B1/8409 Primary

  sheet-shaped · CPC title