Plastic gas barrier packaging laminate
US7476428B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 2005 |
| Grant date | Jan 13, 2009 |
| Priority date | — |
| Expiry date | Apr 2, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A gas barrier packaging laminate having durability to stress crack formation and yet a bending stiffness and good integrity between the laminate layers, includes outer layers of heat-sealable polyolefin, two polymer carrier layers each being coated with a SiOx gas barrier layer, and an intermediate polymer layer that includes at least first and second part-layers. The first part-layer has a higher stiffness than the second part-layer, and the second part-layer has higher elastomeric properties than the first part-layer. A stiff structural sandwich construction is formed by the two stiff carrier layers separated by the intermediate layer that is also shock absorbing to prevent stress-cracking of the SiOx layers. A packaging container manufactured from the packaging laminate and a method of manufacturing of the packaging laminate are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.