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air error keeping o2 outside
Most people -- even those outside the packaging industry -- understand that oxygen is the
nemesis of packaged meals and drinks. Keeping it all out is key for food protection and shelf-life.
But did you know there's an app for determining how much oxygen can permeate a plastic foods
and drink package over time?
It's true.The app, referred to as PackLifeO2, is accessible on iPhone, iPad tablet and Android
platforms and is based on the M-Rule technique, which is a well-respected permeation forecast
The corporation that made the application has referenced it as a "cocktail napkin" form of
calculator for specific resources in certain combinations. In other words, while it may not become
the final word on a certain package's oxygen permeability, it does give a rough hint of such a
susceptability. Although more exact measurements can and should be used before the packaging
is put into production, the app can red-flag huge problems before lots of money is invested in
prototyping, which can be a lengthy and expensive process.
Industry observers assert that the PackLifeO2 calculator is an ideal resource for plastic injection
molding professionals in Illinois along with other states, plastic processors, resin companies,
clinical technicians, factory personnel, equipment makers yet others involved in the initial stages
of the packaging selection process.
The app consists of five inputs: material, layers, concentration, conditions and results which are
the most important criteria for determining the oxygen permeability of a specific container. The
first screen requests the user to distinguish the packing dimensions, surface and capacity. Next,
the designer selects the material options from your pull-down menu. Materials include
polyethylene terephthalate (PET), low-density polyethylene(LDPE), polypropylene(PP),
polycarbonate (PC) and nylon 6. Each layer's thickness is additionally inputted.
Another screen prompts for the first internal and external O2 concentration at parts per million.
This is followed by a screen which asks for temperature (relative humidity is preset at 50%) and
timeframe in which the oxygen permeation should be determined.
Finally, the user clicks on "graph" to pull in the next display, which screens what happens to the
parts for every million of internal oxygen as the packaging is subjected virtually to the
predetermined examination period. There is also a closing screen that displays a summary of the
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