Preparation of polyethylene films
US7011892B2 · kind B2 · utility
3Cited by
7References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 29, 2004 |
| Grant date | Mar 14, 2006 |
| Priority date | — |
| Expiry date | Feb 5, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An essentially transparent, high density polyethylene film is disclosed. The film has a haze of 20% or less, a gloss of 40% or greater, and density within the range of 0.935 to 0.948 g/cc. The film is made by a high-stalk blown extrusion process and then uniaxially oriented in the machine direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.