Under the strain in the claws, the polyethylene quickly cools and solidifies, completing the sealing approach. Just after sealing, the cutter Within the claws cuts the packaging in the sealing spot. Polar Single Chamber Vacuum packing How can vacuuming do the job? Vacuum signifies ‘without the need of air’. https://www.linpack.com/news/streamline-your-liquid-packaging-process-with-advanced-technology