Controlled-permeability film

The flexible films for packaging of the Coralife range are made of polypropylene, polyester or polyethylene, single or laminated.

They are ideal for packaging products requiring significant internal/external gaseous exchange (vegetable products that need to breathe). Each vegetable product has its ideal atmosphere (mix of O2 and CO2) in which all the aerobic metabolic processes are slowed down to minimum survival levels without however triggering anaerobic decay. In these conditions, the shelf-life of the product is at its best.

BUT HOW CAN THIS BE ACHIEVED?

This ideal point of dynamic equilibrium can be reached by separately controlling O2 and CO2 flows at packaging entry and exit. By means of laser perforation methods, it is possible to create, in each film, through-holes of the required diameter of some tens of microns; through these pass both O2 and CO2 in controlled quantities. Through the film surface on the other hand, the permeation of CO2 is always higher than that of O2, in a well-known ratio depending on the type of film. The combination of these two flows according to the type of film adopted, the thicknesses and the number/diameter of the holes permits coming close to this ideal point. The shelf-life of a IV range salad for example is extended from the current 5 days to over 8 days, with enormous advantages in terms of distribution logistic, product quality, etc.

Due to the continual improvement of our products and service, this technical note could change at any time.
All values are reported just as an indication.