Migration of carboxylic acids through plastic laminates

The permeability of oleic and acetic acid through low density polyethylene (LDPE) and ethylene acrylic acid (EAA) have been measured using diffusion cells. In addition, the permeability through LDPE and EAA laminates with different numbers of layers has been determined.
Oleic acid shows an almost 30 times higher permeability compared to acetic acid. In addition, the permeability is lower for both oleic and acetic acid in the laminates compared to the pure films. The results show that it is possible to create barrier materials with decreased permeability, which is interesting for example in the packaging industry. An article about this research was published in the Journal of Membrane Science.
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