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Chementator: This packing material keeps produce moist, while preventing water contact

By Chemical Engineering |

A patented moisture-control technology (MCT) developed by CSIRO Plant Industry (edlinks.chemengonline.com/5827-534), with cooperation from Stellar Films Group (both Melbourne, Australia; edlinks.chemengonline.com/5827-535), has shown it can maintain field freshness of selected fruit and vegetables during extended periods of storage and shipping. In a recent export trial of oranges to the U.S., the MCT liner not only reduced moisture loss, but it significantly reduced the incidence of defects, such as chilling injury and rind breakdown, says project leader Rob Walker. Produce is placed inside a bag made of three layers (picture): an outside polyethylene (PE) layer, a paper layer (bonded to the PE), and a nonwettable layer made of a woven plastic. Moisture, which may form as condensate on the inside of the PE layer, stays between the PE and nonwettable layers and is absorbed by the paper. The function of the liner is maintained even during the temperature fluctuations that often occur during post-harvest handling and shipment. Such temperature fluctuations often result in moisture condensing on the inside of the plastic film; the liner’s design prevents this “free water” from coming into contact with the produce. Tests…
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