AirShield™ oxygen scavenging additive extends shelf life by removing oxygen from rigid and flexible packages such as pouches and packages containing fitments or solid closures. The additive, which is blended with the packaging resin, removes the oxygen that is trapped during the filling process and then acts as an enhanced-oxygen barrier to keep the oxygen out of the container. It also continuously scavenges oxygen so products that release oxygen don’t degrade prematurely. The technology, developed by Las Vegas-based Performance Packaging of Nevada, is less expensive than most of the polymers it replaces and self-triggers when the filling process begins.
“AirShield provides oxygen scavenging (the removal of oxygen) and an oxygen barrier all in one product,” explains Rob Reinders, President of Performance Packaging. “One big benefit is that AirShield remains dormant until the package is filled with product. This is a huge advantage particularly with blowmolded polyethylene terephthalate (PET) bottles. Current scavengers in the PET market activate once the bottle is made, limiting the time processors have to fill the bottles,” he says.
In development for three years, AirShield technology will be available to food and beverage processors and packagers during the first quarter of 2018. Early licensing, now in effect, will grant certain exclusivities for use of the patent-pending technology.
The FDA affirmed that the additives in the oxygen scavenger mix are “generally recognized as safe,” or GRAS, and has issued Letters of No Objection regarding the use of the AirShield additive for any food-contact packaging containers as well as food packaging for products targeted to infants under the age of six months. AirShield technology is already in use in flexible pouches for foods for infants via Performance Packaging’s patented SipP[TM] spouts and caps for pouches.
While highly proprietary, it can be acknowledged that AirShield’s active components are constructed to ensure they don’t start working until food is placed into the package. Any oxygen permeating through the pouch encounters tortuosity (a maze-like path for oxygen permeation created by the addition of mineral compounds to the polymer).
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The introduction of the AirShield additive follows Performance Packaging’s 2015 announcement regarding its patented Pixie Dust liquid-to-gas sterilization process that economically sterilizes flexible packaging and its contents.
Another technology Performance Packaging is working on is magnetic induction heating, a more energy-efficient and economical replacement for tube-in-tube heat exchangers used in food processing. Magnetic induction occupies a vastly smaller footprint, is modular, less expensive and safer and provides a milder heat treatment compared to steam and tube-in-tube. The technology, under development with a partner, is a step toward what is expected to be an all-electric future for food processing.
“Magnetic induction will cut food waste in processing tenfold,” predicts Reinders. “This is the primary concern of the major multinationals and governments around the world. It also reduces the environmental footprint of water, power and steam currently used in the pasteurization process.”