1 Scope
This document specifies a test method for the determination of puncture impact properties
of a plastic film using instruments for measuring force and deflection. It is applicable
if a force-deflection or force-time diagram, recorded at nominally constant striker
velocity, is required for detailed characterization of the impact behaviour. This
test method is also required when a small number of test specimens are available,
and the staircase method described in the ISO 7765‑1 cannot be applied.
The test method is applicable to films of up to 1 mm thickness and makes it possible
to compare impact-penetration forces, biaxial deformabilities and energy-absorption
capacities of films. Also, the transition region between brittle and tough behaviour
of the film under the conditions of testing can be determined by varying the temperature
or the penetration velocity or the relative humidity [ 1 ] .