Oxygen transmission rate through micro-perforated films: Measurement and model comparison

Static and flow-through techniques were used to experimentally measure the oxygen transmission rate of micro-perforated films. The static method simul ates the actual package conditions but is very time consuming. Whereas, the flow-through method is relatively simple and takes less time to give the r esults, but it gave higher values than that obtained by the static method. A regression equation was developed to correlate the data obtained by these two methods. Published models for predicting gas exchange through micro-pe rforations were evaluated. The predicted data by these models were compared with the experimental data obtained by the static method and the flow-thro ugh method for sir different-films. The model proposed by Fishman et al. (1 996) (J = -D(c-c(A))/L-h; L-h = thickness of the film + radius of the perfo ration) had very good agreement with the experimental data from the static method.