Process for producing fiber reinforced foam having a random orientations of fibers
US5707571A · kind A · utility
26Cited by
4References
25Claims
0Family size
Inventor
Key dates
| Filing date | Jun 12, 1996 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | Jun 12, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A fiber reinforced, thermoplastic foam is produced by dispersing fibers of controlled dimensions and blowing agent in molten thermoplastic and extruding the mixture with high back pressures. As the blowing agent expands, the fibers become randomly oriented and a fine cellular structure is formed in the plastic which freezes the fibers in a random spatial orientation. The resulting reinforced foam may be used as formed or compacted to collapse the foam and then shaped.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.