Polyolefin films suitable for institutional applications
US6410136B1 · kind B1 · utility
6Cited by
6References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 16, 1999 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | Nov 16, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyolefin films having high oxygen transmission values are composed of blends of more than about 10% by weight to about 60% by weight of isotactic polypropylene, about 10% by weight to about 25% by weight of low density polyethylene and about 15% by weight to less than about 80% by weight of an olefin heteropolymer containing propylene and at least one other &agr;-olefin of 2 to 4 carbon atoms having a melting point less than that of polypropylene and a density of no greater than about 0.95 g/cc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.