High barrier metallized films and elimination of starry night defects

The BOBST DarkNight process produces high barrier metallized films through defect reduction and web-handling optimization.

Loss of barrier performance due to defects is a common problem

Defects on metallized films lead to a drastic deterioration of barrier properties and poor visuals known in the industry as “Starry Night”. Reduced water vapour and oxygen barrier in turn translate in to a reduction in shelf life of food products.

BOBST DarkNight for Higher Barrier Metallized Film

In order to meet the increasingly demanding standards in the flexible packaging industry for barrier applications and products with longer shelf life, BOBST has developed DarkNight, a unique and innovative process to produce High Barrier metallized films through its K5000 and K4000 vacuum metallizing platforms.

Traditionally, thin Aluminium foils are used as a barrier in laminate structures to protect products from moisture and oxygen permeation, UV light radiation and aroma/mineral oils migration but leading brand owners now want to reduce their Aluminium foil consumption in order to reduce packaging costs but also need a more consistent quality in their supply chain of metallized films.