Polyester coated paperboard for forming food containers and process for producing the same
US4147836A · kind A · utility
47Cited by
9References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1978 |
| Grant date | Apr 3, 1979 |
| Priority date | — |
| Expiry date | Mar 28, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3179
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A coated paperboard product and a process for producing the same which includes corona discharge treatment of a paperboard surface and subsequent extrusion of molten polyester thereon. The resulting product has a very high degree of adhesion between the paperboard and polyester layers, and is capable of being utilized for forming pressed food trays which can be subjected to oven cooking temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.