Packaging laminate with gas and aroma barrier properties
US5508075A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1994 |
| Grant date | Apr 16, 1996 |
| Priority date | — |
| Expiry date | Jun 3, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31848
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A layered material such as a packaging laminate for a packaging container possessing superior oxygen gas and aroma barrier properties. The packaging laminate comprises a first laminate unit and a second laminate unit which are bonded together by the intermediary of an interjacent layer of an adhesive. The first laminate unit has a rigid, but foldable core layer and outer, surrounding layers of thermoplastic, and the second laminate unit has a flexible substrate or carrier layer of thermoplastic which, on its surface, carries a layer acting as an oxygen gas and aroma barrier and consisting of a silicon oxide deposited by chemical plasma deposition and having the general chemical formula SiO.sub.x, in which x may vary within the range of between 1.5 and 2.2. A flexible laminate having a SiO.sub.x barrier layer is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.