Expandable films and molded products therefrom
US5234757A · kind A · utility
52Cited by
5References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 30, 1991 |
| Grant date | Aug 10, 1993 |
| Priority date | — |
| Expiry date | Apr 30, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/699
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A thin, tacky, non-pourable film of incompatible in situ-expandable thermoplastic particles and thermosettable matrix resin that contains an essentially uniform density and thickness across the breadth of the film. The in situ-expandable mass is not pourable yet can be easily dispensed in a uniform manner within a mold and thereafter expanded to the dimensions of the mold. Composites and reinforced compositions, as well as methods of molding, are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.