Plastic film tensile, tear & impact methods
Film tensile, tear initiation, tear propagation and dart impact are separate failure modes. Match thickness, machine/transverse direction, preparation, conditioning, grips and apparatus. Do not compare force, energy and stress outputs as if they were one toughness value.
Sample considerations
- ASTM D882: Thickness, machine/transverse direction, grips, strain rate and conditioning
- ASTM D1004: Film thickness, die geometry, direction and conditioning
- ASTM D1922: Thickness, direction, notch preparation and pendulum range
- ASTM D1709: Film thickness, clamping, dart configuration and conditioning
- ISO 527-3: Thickness, specimen geometry, direction, grips and conditioning