The composite materials examined in this study were tested for their tensile properties. Figure presents the stress-strain curves obtained from tests conducted on PLA-based materials (9a) and PCL-based materials (9b). Table shows the basic mechanical parameters obtained from this test for each material, together with the results of the Charpy impact test. Tensile parameters: σm -tensile strength, E -tensile modulus, εb -strain at break, UT -toughness (area under stress-strain curve); Impact strength parameters: K -Charpy impact strength of unnotched specimens, KV -Charpy impact strength of notched specimens, n.b. -no break.