The POLYFRIEND project is a cooperation between the Polymer Institute of the Slovak Academy of Sciences (PI SAS) and the Polymer Chemistry Group of the Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences of the Hungarian Academy of Sciences (IMEC RCNS HAS). The research and development activities are oriented towards the preparation, evaluation and testing of new macromolecular bio-friendly material systems with the aim of their application in agriculture, packaging industry and several other related fields.