The tensile specimens were tested in a Zwick Z250/SNA
universal testing machine (Zwick/Roell, Germany) with a
displacement speed of 2 mm/min. The gauge length was
100 mm. Respectively, at least five specimens were tested
at 0 machine direction of the roller card. The mechanical
properties determined were maximum strength, strength at
break, deformation at maximum load, deformation at break
and Young’s modulus. The computed results correspond to
average values of samples with the measured specimens.