While looking at shop shelves we may notice that the most widespread package, which is used for packing food stuffs, is the plastic bag. It owes its popularity to a whole range of advantages valued both by customers and food manufacturers. A plastic bag, from which air has been evacuated, guarantees that the packed product will retain its best quality, flavour and taste for a long time. It also means that it will be protected against drying up. This method may be also applied to ensure sterility of medical equipment and helps to avoid corossion of electronic components.

Plastic foil is a relatively cheap material and enables us to place a lot of useful information about the product and producer on it. It contributes to attracting customers and advertising the offered goods.