High density polyethylene compositions, a process for the production thereof and films prepared
US6562905B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2000 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Nov 9, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1397
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention concerns a bimodal film-making HDPE composition, a process for the preparation thereof, a film prepared thereof and a film-making process. The composition comprises at least one polyethylene component having a relatively low molecular weight and another polyethylene component having a relatively high molecular weight. The composition has a shear thinning index defined by the relationship:SHI5/300≦0.00014 &eegr;5kPa+78wherein&eegr;5kPa is the complex viscosity at G*=5 Pa andSHI5/300 is the ratio of complex viscosity at G*=5 kPa to the complex viscosity at G*=300 kPa.By means of the invention it is possible to produce material for making HDPE blown films with good mechanical properties in a process where the whole range of PE products from LLD to HD can be produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.