Multilayer heat sealable oriented packaging film and method of forming same
US4439493A · kind A · utility
37Cited by
10References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1983 |
| Grant date | Mar 27, 1984 |
| Priority date | — |
| Expiry date | Feb 4, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31935
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A multilayer oriented heat sealable film structure comprising a polyolefin film substrate, a coextruded layer of random copolymer of ethylene and propylene, a primer layer on said random copolymer layer and a layer of heat sealable acrylic interpolymer on said primer layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.