Freezable/microwaveable packaging films
US7919738B2 · kind B2 · utility
8Cited by
24References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2006 |
| Grant date | Apr 5, 2011 |
| Priority date | — |
| Expiry date | Mar 14, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24975
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A multi-layer freezable/microwaveable film having both low temperature resistance and high temperature resistant to withstand subzero freezer storage temperatures and microwave cooking temperatures. The freezable/microwaveable film includes a three-layer coextruded film having a polypropylene/alpha-olefin copolymer inner, heat sealable layer, an adjacent polypropylene or high density polyethylene core layer, and an outer polyethylene skin layer adjacent the core layer opposite the heat sealable layer, and further includes an outer protective layer laminated to the outer skin layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.