Dual barrier laminate process
US5066443A · kind A · utility
16Cited by
11References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 11, 1990 |
| Grant date | Nov 19, 1991 |
| Priority date | — |
| Expiry date | Apr 11, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/335
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides a novel process for the coextrusion of a laminate containing more than a single barrier layer. The process overcomes the interfacial instability associated with thinning and spreading a composite stream containing a barrier layer of EVOH. Furthermore, the process prevents migration of EVOH particles from regrind.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.