The transparent vacuum film should allow good visual presentation of the product, maximum shelf life and freshness of the product, as well as protection from humidity, air, strange flavors and mechanical protection. Unlike the vacuum bags which are used for packing in single chamber and double chamber vacuum machines, vacuum film is used for packing with fully automatic vacuum lines.
For this kind of packing are used two types of film: Top web and bottom web.
Bottom web should be thicker and strong enough to last through the process of thermoforming. With the new technology of vacuum film manufacture, the bottom web can have from 3 to 15 layers of material, depending on the desired barrier. The most common structure of vacuum film used for food packaging is polyamid (PA), polyethylene (PE), polypropylene (PP) and ethylvinyl alcohol (EVOH). Depending on the extrusion and the type of product that is being packed, the thickness of this film can very from 80 to 240 microns.
Top web can be transparent, opaque, gold or printed, according to the client’s needs. Usually the thickness of the top web varies from 25 to 100 microns, which is strong enough, because this film doesn’t undergo the process of thermoforming.
Vivavak Kompani offers top and bottom web with width from 70 to 460mm, and thickness from 60 to 240microns. The film’s origin is from European Union and has all the certificates and declarations that are necessary. It has excellent quality, even extrusion and great transparency.
Check out the video to see how the process of packing with a fully automatic thermoforming vacuum line looks like!