Opaque films for use in packaging
US8075986B2 · kind B2 · utility
0Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2009 |
| Grant date | Dec 13, 2011 |
| Priority date | — |
| Expiry date | Aug 5, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An opaque polymer film is prepared by admixing high crystalline polypropylene with a microvoid causing filler and extruding to form a sheet that is then biaxially stretched to form an opaque film. End uses for these films include soda bottles, candy wrappers and synthetic paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.