Plastics and rubbers are two very different, important materials in this modern age that are needed and used a great deal in our everyday life, both in the indoors and the outdoors of our living spaces. However, there is still, controversy almost all the time, about the use of certain ones and hence there is somewhat of a misconception surrounding the use of these materials, with certain beliefs and scare stories about their possible negative effects on human health; i.e., the belief that any form of PVC use can cause cancer. However, today, it is known that it is not PVC itself, but its monomer, vinyl chloride, and certain special additives incorporated with it (i.e., certain phthalates used as plasticisers), which are responsible for these negative effects. And the reality is such that, PVC is being used as blood bags in medical applications successfully, with no problems. Hence, the separation line of ‘whether something is toxic and harmful to health’ or ‘not’, (and if it is, under which conditions) is a very critical issue and therefore,