Multi-layer sheet suitable as sealable sheet
US6224973A · kind A · utility
12Cited by
2References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 8, 1999 |
| Grant date | May 1, 2001 |
| Priority date | — |
| Expiry date | Sep 8, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2848
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A multi-layer sheet suitable as sealable or peelable sheet specially used for closing foodstuff containers or blisters. This multi-layer sheet comprises a tie-layer between a substrate layer and a seal or a peel-seal layer comprising a polyolefin with acid or anhydride, grafted or copolymerized. The tie-layer has a thickness equivalent to 1-7 g/m.sup.2. The seal layer comprises a polyolefin. The total thickness of the combination of tie-layer and seal layer is equivalent to 3-20 g/m. This multilayer sheet is prepared by extrusion or coextrusion coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.