Leaching contaminants from post-consumer for reuse in food-contact applications
US5780520A · kind A · utility
20Cited by
10References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1996 |
| Grant date | Jul 14, 1998 |
| Priority date | — |
| Expiry date | Dec 23, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A novel technique to treat post-consumer polyester for reuse in food-contact applications is described. The process comprises contacting contaminated post consumer polyester flake with at least one extraction solvent which is soluble in said contaminated flake at a temperature sufficient to allow rapid diffusion of contaminants from said polyester flake; and removing said extraction solvent containing said contaminants from said polyester flake.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.