A universal testing machine (SMT-20, Santam, Tehran, Iran) equipped with a 60 N load-cell was used to measure tensile strength (TS), elongation at break (EAB%) and elastic modulus (EM) according to the ASTM standard method D 882-09 (2009). films strips of 110 _ 20 mm were conditioned at 23 ฑ 2 _C and 53 ฑ 2% relative humidity for 48 h in an environmental chamber before testing. Initial grip separation and mechanical crosshead speed were set at 50 mm and 5 mm/min, respectively. Each type of film was tested by at least five replicates.