Extruded polylactide foams blown with carbon dioxide
US8013031B2 · kind B2 · utility
3Cited by
9References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2005 |
| Grant date | Sep 6, 2011 |
| Priority date | — |
| Expiry date | Aug 6, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2367/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention provides a process for extruding a PLA resin using high levels of CO2. Excellent quality, low density foam is produced easily and reproducibly. The foams arc capable of being heat-annealed to induce significant crystallinity, even when an ordinarily amorphous PLA resin is used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.