Tensile strength of the film and percentage elongation break test

Three pieces of film strips (4 cm x 2 cm) from each formulation were cut evenly, and the tensile strength and percentage elongation at break were evaluated using a tensiometer. The tensiometer consists of two load cell grips, a lower fixed one and an upper movable one. A film strip was fixed between these cell grips, and the force was gradually applied until the film broke.²³ The tensile strength and percentage elongation at break were read directly from the dial reading.