Coextruded film with peelable sealant
US5023121A · kind A · utility
40Cited by
24References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1990 |
| Grant date | Jun 11, 1991 |
| Priority date | — |
| Expiry date | Apr 12, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31913
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An easily opened package is made by heat sealing a first web to a second web. The sealing layer of the first web is a blend of polybutene and polypropylene with a third polymeric material of ethylene vinyl acetate copolymer. Low density polyethylene, linear low density polyethylene, or ionomer. The sealant layer of the second web is ethylene vinyl acetate copolymer, low density polyethylene, linear low density polyethylene or ionomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.