Multilayer film having improved heat sealing characteristics
US4963419A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 1987 |
| Grant date | Oct 16, 1990 |
| Priority date | — |
| Expiry date | May 13, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31928
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A multilayer film is disclosed having improved heat sealing characteristics, comprising a first outer layer containing a heat sealable thermoplastic polymer having substantial freedom from cross-linking bonds, and a second layer containing a cross-linked ethylene polymer. In one embodiment the multilayer film is suitable for use in packaging primal and subprimal meat cuts, said film comprising a first outer layer containing a heat sealable thermoplastic polymer; a core layer comprising an oxygen barrier film; and a second outer layer comprising an ethylene polymer having siloxane cross-linking bonds. In another embodiment the multilayer film contains a second core layer containing an ethylene vinyl acetate copolymer, which is located between the barrier core layer and the second outer layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.