Most food packaging materials comprise conventional polymers, like polyethylene, polyethylene terephtalate, polypropylene, as ideal candidates for safe packaging and they easily comply with relevant national and international regulations. Polypropylene rigid packaging is a key raw material for rigid packaging as its properties can be adapted and closely controlled to meet the needs of the process and the end application. Its uses include food packaging, industrial chemicals and media thanks to its malleability and durability. Polypropylene trays are used for fresh, refrigerated or frozen foods such as desserts, salads and snacks, and as a barrier layer for packaged foods to be stored for extended periods of time at ambient temperature. Despite of these advantages, conventional packaging materials are a huge problem precisely because of their long persistence in environment and non-biodegradability.

A big effort to extend the shelf life and enhance food quality while reducing packaging waste has encouraged the development of new active food packaging systems. Active packaging is an innovative concept that can be defined as a food/package/environment system that works in a coordinated way to change the condition of the packed food product and are designed to extend shelf life, improve safety and/or enhance sensory properties in foods and beverages, while maintaining the quality of the packed food. Active packaging can be achieved by adding active ingredients in the packaging system and /or using functionally active polymers.