Biodegradable composites
US8464728B2 · kind B2 · utility
5Cited by
6References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2010 |
| Grant date | Jun 18, 2013 |
| Priority date | — |
| Expiry date | Sep 29, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/30
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention concerns a biodegradable cigarette filter tow comprising composite filaments of cellulose and cellulose acetate, and a process for making such a filter tow comprising providing a solution dope comprising a blend of cellulose and cellulose acetate in an ionic liquid or in N-methylmorphilone-N-oxide (NMMO), and spinning casting the blend into a protic solvent to generate fibers or films, and converting the fibers or films into cigarette filter tow. The invention also concerns cigarette filters and cigarettes made from such a filter tow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.