Packaging material of laminate type
US5133999A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1990 |
| Grant date | Jul 28, 1992 |
| Priority date | — |
| Expiry date | Oct 16, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31993
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A flexible, laminated material (10) for reforming into packages for contents of the type such as oxygen- and flavor-sensitive liquid foods, for example fruit juices. The material displays a carrier layer (11) of paper or paperboard and a preferably extruded layer (13) applied to one face of the carrier layer (corresponding to the inside of the finished package), this layer consisting of a mixture of polyethylene and ethylene vinyl alcohol copolymer. Since the barrier layer (13) thus includes both a polar (the ethylene vinyl alcohol copolymer) and a non-polar (polyethylene) component, the material possesses barrier properties against both polar and non-polar flavor components, at the same time as the material moreover displays tightness properties vis-a-vis oxygen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.