ASTM D1922 Tear Test
Standard Test Method for Propagation Tear Resistance of Plastic Film and Thin Sheeting by Pendulum Method
Tear testing measures the force required to continue the tearing of an initial cut in sheet materials. Models and weights are available to test material with a variety of strengths. This is also useful to evaluate strength of perforated materials.
An automated tear tester equipped with an optical encoder for measuring the angular position of the pendulum during tearing and converting this measurement to tear units.