Method for separating and recovering layered plastics joined at an interface
US4981876A · kind A · utility
17Cited by
1References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 13, 1989 |
| Grant date | Jan 1, 1991 |
| Priority date | — |
| Expiry date | Oct 13, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process of separating vinyl skin from a foam backing and recovering the separated components by granulating the plastics composite into small chips, mixing the chips with a quantity of water in a vessel to swell and break the cell structure of the foam at the foam/vinyl interface resulting in flotation of the foam bits and sinking of the heavier vinyl bits. The separated foam is recovered by adding additional water to flow the foam material from the mix vessel. The vinyl is then removed from the bottom of the vessel and the separated components are dried for recycling or improved disposal purposes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.