Medical products such as blood bags and tubing are often made from soft PVC, a plastic that contains phthalate plasticizers, which are suspected to be harmful to human health. These substances are not chemically bound to the polymer, which means they can leach into the blood bags and thus come into contact with human cells. A new method developed at the Fraunhofer Institute for Surface Engineering and Thin Films IST prevents these harmful substances from migrating into the surrounding media.
