Polyolefin films based on blends of polypropylene and olefin heteropolymers
US6514625B1 · kind B1 · utility
14Cited by
9References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 28, 2000 |
| Grant date | Feb 4, 2003 |
| Priority date | — |
| Expiry date | Jul 31, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31913
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Oriented polyolefin films are prepared with blends of a high crystalline polypropylene and an ethylene/propylene copolymer having less than 10%, by weight, of ethylene. These films, in a preferred embodiment, exhibit higher oxygen and moisture vapor transmission properties than do unmodified polypropylene. In addition, these films have low haze. This combination of properties make the films useful in modified atmosphere packaging applications for fresh produce and flowers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.