Process for producing a polyethylene-polypropylene multilayer blown film
US8337743B2 · kind B2 · utility
0Cited by
3References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 20, 2008 |
| Grant date | Dec 25, 2012 |
| Priority date | — |
| Expiry date | Dec 6, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31917
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a process for producing a multilayer film comprising at least one polyethylene (except high pressure polyethylene) and polypropylene layer, wherein the adhesion between the polyethylene and polypropylene is enhanced without the use of any tie layer by processing the film with a freezing time of less than ten seconds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.