Painted plastic material recycling process
US6217804A · kind A · utility
16Cited by
25References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1994 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Oct 17, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/046
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In a recycling process, granulated plastic material coated with a paint film is melted in an extruder. During extrusion, the paint film is volatilized and removed by vacuum from the melted granulate stream. Additives are admixed with the particulates and any remaining paint film in an extruder. Water is introduced into the melted plastic stream in the extruder to neutralize toxic material levels discharged from the extruder and from the extruded plastic material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.