sinus wave opening function

swof-label
  What is swof?
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In a nutshell
The swof label (swof = sinus wave opening function) is a self-adhesive label for controlling the opening of flow wrap packs.
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swof = sinus wave opening function
Present situation
Flow wraps are in widespread use for packaging particulate products. Opening flow wraps exactly has, however, been a problem up to now. The flow wrap generally tears in an uncontrolled way, which can lead to unintentional and unwelcome spilling of the pack contents. Possible solutions - such as perforation or zip closures - either destroy the water vapour barrier of the pack or are too expensive.

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