Processing aids for enhanced machine direction orientation rates and property enhancement of polyolefin films using hydrocarbon waxes
US6887923B2 · kind B2 · utility
2Cited by
6References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2002 |
| Grant date | May 3, 2005 |
| Priority date | — |
| Expiry date | Dec 11, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/91
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention disclose a method for the orientation of a high density polyethylene (“HDPE”) film. The process of the invention comprises forming a HDPE-wax mixture by adding to a HDPE batch a normally solid hydrocarbon wax. The HDPE-wax mixture is subsequently stretched into a film at an orientation temperature below the film's melt temperature. The hydrocarbon wax is characterized by having a drop point equal to or lower than the melting point of the HDPE film. The present invention also provides a film made by the process of the invention and a master batch thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.