Polypropylene film having good drawability in a wide temperature range and film properties
US6596814B2 · kind B2 · utility
35Cited by
5References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2001 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Nov 28, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides polypropylene films and methods of making these films using high melt strength &bgr;-crystalline polypropylene. The films of the present invention are opaque, porous and have good physical properties, such as being capable of cold drawing to a thin gauge without breaking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.