Method for producing an acoustically resistive structure, acoustically resistive structure thus obtained, and sound-absorption panel comprising said acoustically resistive structure
US11325323B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 2020 |
| Grant date | May 10, 2022 |
| Priority date | — |
| Expiry date | Nov 14, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2307/10
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for producing an acoustically resistive structure includes the steps of creating, consolidating and cutting a first layer of reinforcing fibres embedded in a first thermoplastic resin having a first melting point so as to obtain an interlayer, a step of laying a second layer of reinforcing fibres against a first face of the interlayer, a second consolidation step of consolidating the second layer of reinforcing fibres embedded in a second thermoplastic resin having a second consolidation temperature lower than the first melting point of the first resin so as to obtain a non-perforated external layer bound to the interlayer, a step of perforating the external layer and a step of laying an internal layer on a second face of the interlayer. An acoustically resistive structure obtained from the method as well as a sound-absorption panel including such an acoustically resistive structure are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.