Oxygen, permeability, polymer packaging materials

The oxygen permeability of silicone materials is just one example of the selective permeability of polymers. The application in the artificial gill is a dramatic one, and the effect is used in many other areas. The selection of materials to package foods is based on the... 

The cross-linked HPC matrix and composites with 10-30% of fibers have similar or even lower oxygen permeabilities than those of most common polymers used in food packaging (LDPE, HDPE, PP and PS), which makes these materials good candidates for that application. 

With the exception of packages for fresh produce, MAP trays or pouches need to be made of materials with low permeability to gases (CO2, Nj, O2). Laminates made of various combinations of polymer as PET, PVdC, PE, and polyamides such as nylons should have low oxygen permeability [175-178]. Respiration in fruits and vegetables leads to a build-up of carbon dioxide that may reduce the rate of respiration and help to prolong the shelf life of the product a reduction in the oxygen... 

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