Double and Triple Bubble line
Double and triple bubble extrusion lines are used to produce biaxially oriented plastic films.
Material is stretched in machine in a transversal direction simultaneously. This processe delivers a molecule orientation in both axes, and this enhances many of their properties.
Typical applications are shrink and barrier packaging, casing film, and high barrier film packaging. In case a barrier layer is required this may be based on Pvdc or Evoh.