Method of recycling polyurethane foam components
US6299811A · kind A · utility
6Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1999 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | Apr 23, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/916
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for recycling materials including a significant portion of polyurethane foam includes forming the foam into a fluff of particle sized 0.25-1.0, and most preferably 0.25-0.50 inch. The material is moved to a mold and molded at an elevated temperature and pressure. Preferably, the glass transition temperature of the foam is exceeded. Other filler materials may be mixed with the fluff material. The invention recycles scrap which includes polyurethane foam, but greatly reduces the complexity of re-utilizing the scrap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.