Easy-opening high barrier plastic closure and method therefor
US7364779B2 · kind B2 · utility
11Cited by
28References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 2, 2003 |
| Grant date | Apr 29, 2008 |
| Priority date | — |
| Expiry date | Nov 18, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31935
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A plastic, easy-opening closure for a retortable container and a method for sealing are provided. The closure includes a plastic membrane having an outer layer of polypropylene, a first tie layer, an intermediate layer formed of EVOH, a second tie layer, an inner layer formed of polypropylene, and a peel-seal layer. The peel-seal layer can be formed of high density polyethylene or polypropylene with a contaminant dispersed therein so that the closure can be easily removed from the container for opening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.