Method of making foam-filled cellular structures
US4964936A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 11, 1988 |
| Grant date | Oct 23, 1990 |
| Priority date | — |
| Expiry date | Oct 11, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2379/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A non-flexible, non-resilient recurable cellular material, prepared by exposing cured polyimide foam to an atmosphere of steam at an elevated pressure, is introduced into a honeycomb or like structure so that the cells are at least partially filled with the recurable cellular material. The cellular material is then cured while contained within such cells to form a composite polyimide foam-containing structure. Laminates may be applied to either or both faces of the polyimide foam-containing cellular structure. These articles possess enhanced strength, yet are lightweight and flame resistant, and thus useful for structural, vibration damping and thermal insulation applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.