PROPAMETIC barrier films are very efficient for ultraviolet rays protection thanks to its internal aluminium layer. PROPAMETIC barrier films are multi-layered products obtained laminating of 3 or 4 technical materials supplying a very powerful barrier also against water vapor and moisture. In addition to being waterproof, the technical properties of PROPAMETIC films give the product a high mechanical resistance and make it easy to weld. This allows a straightforward use in the production of caps, sacks, bags and liners for rigid and flexible containers, and for the packaging of all products intended for overseas shipments or long-term storages.