Before composite manufacturing, the applied MMT modification effects on the thermal and structural properties of potential PBS composite filler were analyzed using TGA, FTIR, and XRD analyses. Mechanical properties of the biocomposites were evaluated by static tensile test, while dynamic thermomechanical analysis (DMTA) supplemented with thermal characterization (DSC, TGA) allowed for a comprehensive assessment of the structure-property relationship related to interfacial changes differentiated by chemical modification of applied filler. The morphology of the materials was characterized by XRD, SEM, and FTIR and supplemented with rheological behavior determination. In order to estimate the stake potential in the mentioned packaging sector, the barrier properties toward oxygen (OTR) and water vapor (WVTR) were measured instrumentally, and antiviral properties were studied using bioreactors.