Multi-layer thermoplastic films and packages made therefrom
US7316833B1 · kind B1 · utility
11Cited by
115References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1999 |
| Grant date | Jan 8, 2008 |
| Priority date | — |
| Expiry date | Jul 30, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3192
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A multilayer thermoplastic film, and packages made from the film, comprising a layer of ethylene vinyl alcohol (EVOH) as an oxygen barrier layer, a layer of a polymer or copolymer formed by the polymerization reaction with a single site catalyst and ethylene vinyl acetate (EVA) as a sealant layer, and alternatively containing a layer of EVA, said film having improved sealability and improved clarity as compared to conventional films.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.