Sound insulation material and method of producing sound insulation material
US11912009B2 · kind B2 · utility
1Cited by
2References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 15, 2019 |
| Grant date | Feb 27, 2024 |
| Priority date | — |
| Expiry date | Nov 25, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R13/0838
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A sound insulation material 1 includes a first layer 10 constituted by a polyurethane foam, a second layer 20 that is laminated on a surface of the first layer, the surface being located on a first side, and that is constituted by a sheet-shaped member made from a material other than polyurethane, and a third layer 30 that is laminated on a surface of the second layer, the surface being located on the first side, that is constituted by a polyurethane foam, and that, over its entirety, has a higher density than the density of at least a portion of the first layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.