Today, high performance barrier films or high barrier packaging are widely used in the food industry. Other areas where high-barrier packaging is commonly used include medical devices, pharmaceuticals and increasingly booming pet foods. An important reason for the rapid development of high barrier flexible packaging systems is that this packaging prevents the spread of bacteria. Many of these new types of flexible packaging are also in development, some with some metal foil or spray the formation of high barrier metal layer, and some are also fitted with zippers or similar structure.