| 摘要 |
Disclosed is a method of increasing the gas transmission rate of a packaging film comprising the steps of: providing a packaging film comprising at least about 0.001 weight percent, based on the weight of the film, of fullerene material comprising spherical fullerenes; and exposing the packaging film to an amount of radiation energy selected from (i) a surface dose of non-ionizing radiation of at least about 0.01 mJ/cm2 that is delivered within a duration of at most about 30 seconds and (ii) an absorbed dose of ionizing radiation of at least about 0.1 kGy that is delivered within a duration of at most about 30 seconds effective to structurally disrupt at least a portion of the fullerene material present in the packaging film of the providing step and increase the oxygen transmission rate of the packaging film by at least about 100 cubic centimeters (at standard temperature and pressure) per square meter per day per 1 atmosphere of oxygen pressure differential measured at 0 percent relative humidity and 23 degrees C.
|
