Forming evacuation channels during single and multi-layer...

Details Forming evacuation channels during single and multi-layer... Forming evacuation channels during single and multi-layer...

B - Operations, Transporting

29

C

B29C 47/06 (2006.01)

Patent

CA 2519507

A method for making a vacuum packaging film includes flowing a plastic melt, from a multi-layer extruder (302), onto a rotating roller (308). The plastic melt is then cooled while simultaneously imparting a pattern, via a pattern imparting means, onto the plastic melt resulting in the vacuum packaging film.

L'invention concerne un procédé de fabrication d'un film d'emballage sous vide. Ledit procédé consiste à faire circuler une matière plastique fondue à partir d'une extrudeuse de couches multiples sur un rouleau rotatif. La matière plastique fondue est ensuite refroidie. Simultanément, on applique un modèle sur ladite matière fondue, au moyen d'un élément d'application de modèle, ce qui permet de former le film d'emballage sous vide.

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