Stretching unit Uni- or bidirectional stretching with selectable temperature, stretching grade and stretching speed for simulation of thermoforming process. - Sample size 100 x 100 mm or 200 x 200 mm,   thickness max. 3 mm - Sample size stretched max. 500 x 500 mm - Traction 2 kN (4 kN maximum) - Speed from 1 to 500 mm/s - Controlled heating up to approx. 300°C with non-contact   measuring of film temperature