The static tensile tests of the PBS films (without the additives and composites) were conducted with Zwick/Roell machine (Ulm, Germany) equipped with a 2.5 kN load cell on 10 mm width stripes. The grip separation was 25 mm, and the testing speed was 100 mm/min. The test was carried out for at least 6 repetitions for each specimen at ambient conditions. Analysis of variance (ANOVA) with the post hoc Tukey test was used to compare the significant difference for each mean value (for all parameters). All analyses were performed assuming a significance level below 0.05.