Several packages were produced containing 200 g of iceberg
salad packed in contact with different PLA films (PLA and PLA
containing 2, 5% and 6.5% Proallium®). 4 pieces of PLA film
16 6 cm each were placed into commercial bags of polypropylene
(23 19 cm) yielding a ratio of 1.9 cm2 of film per g of salad, this is
380 cm2 of film. These commercial bags were made of oriented
polypropylene film which has the following characteristics (30 mm
thickness, 1300 cm3 m2 day1 of oxygen transmission rate and
6gm2 day1 of water vapour transmission rate and antimist
treatment). Then, the bags were heat sealed with an initial modi-
fied atmosphere composed by 10% O2 e 10% CO2 e 80% N2. Sample
bags of iceberg salad were stored at 4 C for 7 days, simulating
commercial conditions of production, transport and
commercialisation.