Articles

MEASUREMENTS OF FILM PERMEABILITY TO DETERMINE THE OPTIMAL FILM FOR MAP OF SWEET CHERRY

Article number
600_118
Pages
771 – 774
Language
English
Abstract
The design of MAPs for fruits requires careful tuning to account for the interaction between the cultivar, the surrounding atmosphere and external conditions; which is usually accomplished by “trial and error”. Knowledge of the permeability of the available films in the relevant range of temperatures would allow the prediction of the evolution of the MAP atmosphere (as long as the respiratory characteristics of the cultivar under consideration are known), and hence the design of the optimal MAP. A device to measure the permeability of flexible films to O2 and CO2 has been developed.
The device operates on the principle of the standard test method for gas transmission rate through plastic films ASTM D3985-95. The measurements can be made at different temperatures.
The permeability of six films (two low-density polyethylenes and four polypropylenes) has been determined at temperatures of 0, 2, 5 and 25 ºC. The optimal film was selected for MAP storage of Burlat and Sunburst sweet cherries taking into account their tolerance to different O2 and CO2 levels.
Monitoring of the evolution of the atmosphere composition inside the packages has verified the predictions of our model and thus validated our method for choosing the optimal film and MAP conditions.

Publication
Authors
M.L. Salvador, A.I. Villarroya, R. Oria
Keywords
model, gases, permeation, flexible packaging
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