Two-component, heat-sealable films
US6534137B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 12, 1999 |
| Grant date | Mar 18, 2003 |
| Priority date | — |
| Expiry date | Oct 12, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31928
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A two-component laminated multilayer film suitable for use in packaging articles such as pet food comprises a first component and a non-heat-shrinkable second component. The first component comprise an outer first film layer, an optional second film layer, and an optional third film layer. The first and third film layers comprise ethylene/alpha-olefin copolymer, while the second film layer is a modified ethylene copolymer. The second component comprises an outer fourth layer, an oxygen barrier fifth layer, sixth and seventh layers which serve as tie layers and are positioned on either side of the barrier layer. The multilayer film is heat sealable to itself and another film. The multilayer film has a total thickness of at least 2 mils, an impact strength of at least about 3 ft-lbs, an elongation at break of less than 300%, a tear propagation of at least 50 grams, a tensile modulus of at least 45,000 psi, total free shrink at 180° F. of from less than 50 percent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.