Anti-microbial polymer films for food packaging

Anti-microbial fitted polymers can protect the surface of food from unwanted microorganisms like bacteria, yeast and mould or prevent or suppress their growth. This type of active packaging contributes to a better quality and shelf life. Today the extended use of polymers offers new possibilities to construct anti-microbial packaging materials. There are two different mechanisms of anti-microbial fitted films, surface fixed anti-microbial groups or release of active agents. Based on the release mechanism different antimicrobial substances can be used and put into films via several procedures. Our conception: We aim to remove preservatives from food and place them only where protection is necessary. Preservatives are released in a low concentration from the packaging to contact the food surface. Therefore we use food grade polymers and preservatives permitted in Germany in food and polymers as well (benzoic and sorbic acid). We also use conventional technologies like compounding or preferably laquering for upgrading of basic films. Mono- or multilayer films can be fitted additionally with active layers. They do not interfere with mechanical or physical properties of the basic material. The anti-microbial packaging works by slow migration of the agents from the packaging material to the surface of the products, thus helping to maintain concentrations needed. The incorporated substances can control microbial contamination. Therefore use is predestinated for solid or semi solid food or semi-finished products directly in contact with the foil: dairy products, fresh meat, meat products, fish, pasta, bread, fruits, vegetables. It is not suitable for liquids.