Sealable film
US6231975A · kind A · utility
51Cited by
27References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1997 |
| Grant date | May 15, 2001 |
| Priority date | — |
| Expiry date | Jan 24, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31928
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A sealable film comprises: PA1 (a) an inner layer comprising an olefin polymer; PA1 (b) a sealing layer; and PA1 (c) a separable layer positioned between the inner layer and the sealing layer, the separable layer comprising (1) ethylene-propylene block copolymer or (2) a blend of polyethylene and another olefin which is incompatible with the polyethylene, specifically either (i) polypropylene homopolymer or (ii) ethylene-propylene block copolymer. Methods of making the sealable film are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.