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Commonly specified film attributes

Here are the measurable and quantifiable properties you need to ensure a successful execution of a flexible film package.

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A product’s needs for functions – as discussed in the 2012 Flexible Packaging Playbook article, Common flexible packaging performance descriptions can be described in general terms. However, measurable and quantifiable attributes or properties that relate to these functions are the route to ensuring a film package is successful for a specific application. The types of attributes or properties to consider when determining ‘what matters’ for an end use include (key is to remember that the mix of importance of attributes depends on ‘what matters’):

  • Thickness
  • Basis weight
  • Tensile properties
  • Tear strength
  • Puncture or impact resistance
  • Abrasion resistance
  • Maximum and minimum service temperature
  • Optical properties
  • Heat seal characteristics
  • Dimensional stability
  • Surface energy 
  • Coefficient of friction
  • Barrier properties
  • Chemical resistance
  • Regulatory compliance
  • Environmental impact
 
While specific converting sequences and end use applications may have unique requirements or nuances, many similarities exist and taking guidance from rigorously made successful film choices can streamline choosing and specifying. The earlier admonitions are still relevant - knowing why a performance attribute is important (“matters”) leads to better choices and a faster road to new success.
 
These attributes/properties provide a good starting point, but will not cover all possible end use requirements (think static dissipation for packaging of electronic componentry), bringing us back to the inescapable conclusion that this is a thinking person’s game.
 
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