US developer of proprietary barrier coatings NanoPack claims considerable success in improving moisture vapour and oxygen barriers on clear PLA (polylactic acid) packaging films, promising in longer shelf life for food products. The first in what will be a series of patents has recently been awarded by the European Patent Office.
NanoPack says its NanoSeal coating system creates a good barrier and bonds well to PLA films: an added benefit since coatings do not normally adhere well to PLA. The company is now testing its PLA film barrier system with a number of converters for applications such as nuts, chips, dry mixes and confectionery products.
President and CEO Howard Kravitz avows: “We’ve achieved OTRs with standard PLA that have dropped from 70cc/100inch²/day-atm to a mere 0.2 cc/100inch²/day-atm. MVTRs have declined from 30-35g/100 inch²/day-atm down to just 6g/100inch²/day-atm. These values can be further improved with metallization applied directly on top of our coating.”
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