Dynamic Viscoelasticity Properties Evaluation of Skin and Making of Dummy Skin for Safety Evaluation

Abstract

　　　In this research, we investigated dynamic viscoelasticity properties of human skin, Hitohada gel (urethane gel), and porcine fat in order to make dummy skin which could be used for safety evaluation. The Hitohada gel is a material which has a hardness equivalent to human skin. As a result of the initial investigation, it has been revealed that the dynamic viscoelasticity properties of the Hitohada gel are different from that of human skin. Thus, we have focused on the tension of the human skin. In the investigation, the test dummy, which was made of the Hitohada gel and covered with tensioned dressing material, showed a similar dynamic viscoelasticity property to human skin. With these results, we consider that dummy skin is required to imitate not only the dynamic viscoelasticity property but also the tension of epidermis of human skin. In addition, we also have succeeded in developing dummy skin, whose hardness and dynamic viscoelasticity properties are similar to those of males in their 20s.