Increasing the gas transmission rate of a film comprising fullerenes
US7678841B2 · kind B2 · utility
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29References
51Claims
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Key dates
| Filing date | Aug 19, 2005 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | Jan 4, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2439/70
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of increasing the gas transmission rate of a packaging film comprises providing a packaging film that comprises at least about 0.001 weight % of fullerene material selected from spherical fullerenes, bowl-shaped fullerenes, multi-walled carbon nanotubes, carbon nanocones, and carbon nano-onions. The packaging film is exposed to an amount of radiation energy effective to increase the oxygen transmission rate of the packaging film by at least about 100 cc (STP)/m2. day (1 atm, 0% RH, 23° C.).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.