The static bending tests were carried out in accordance with EN ISO 178 using a universal testing machine (Instron 5966) with a 10 kN head. The measurements were performed at 25 °C with a bending rate of 2 mm/min and the span length of 64 mm. The test was carried out on 80 mm x 10 mm x 4 mm injection moulded specimens. Using this technique, two characteristic parameters were determined: flexural modulus (EB) and stress at 3.5% strain (σε=3.5%). The results obtained are the average values of approximately 10 measurements.