Process for preparing a paperboard laminate
US5114626A · kind A · utility
4Cited by
7References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 12, 1991 |
| Grant date | May 19, 1992 |
| Priority date | — |
| Expiry date | Mar 12, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B27/10
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A non-foil paperboard laminate having improved resistance to the migration of essential oils, flavors and vitamins in liquid packaging and improved oxygen barrier characteristics for both liquid and dry packaging has a paperboard sandwiched between two layers of a heat-sealable, low density polyethylene polymer and including a symmetrical five component barrier layer coextruded onto the surface of one of the low density polyethylene layers. The barrier layer includes low density polyethylene/adhesive tie layer/Ethylene vinyl alcohol copolymer/adhesive tie layer/low density polyethylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.