Method and apparatus for triggering oxygen scavenging composition with pulsed light
US6911122B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2002 |
| Grant date | Jun 28, 2005 |
| Priority date | — |
| Expiry date | Jan 28, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2201/012
- WIPO fieldFood chemistry
- WIPO sectorChemistry
Abstract
A method for triggering an oxygen scavenging composition for use in packaging an oxygen sensitive article includes the steps of providing an oxygen scavenging composition comprising an oxidizable organic compound and, optionally, a transition metal catalyst, and exposing the composition to a source of pulsed light wherein each pulse has a duration of between 1 microsecond and 1 millisecond, a frequency of between 0.1 to 100 Hertz, and a total intensity of at least 350 mW/cm2 so that each pulse provides the composition with a dose of UV light of at least 0.1 J/cm2 so as to provide a triggered composition. The triggered composition can be applied to an article so as to provide an oxygen scavenging package. An apparatus and packaging system are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.