Vacuum packaging products   Barrier films are used to improve the shelf life and the quality of products f.e. foods and animal foods. Barrier films against humidity also prevent that a wet product will not dry up (like bakery products), and they also prevent that dry food products will get damp.   Barriers against oxygen prevent the oxidation process of sensitive products which contain oil and fat and they protect the products to go mouldy. Barriers against aroma will keep the own aroma of goods like coffee or tea and the products are protected against other odours of the surrounding (like odour of petrol). Opaque barriers prevent any oxidations process and the protect the fatty goods to turn rancit.       Technical data