Tear strength and tear resistance need to be measured where a product is intended to tear, e.g. along a crease or perforation or to open a package, as much as to simply ensure strength.
In some materials a tear will propagate rapidly, predictably or evenly, in others it will not.
Tear testing methods set standard conditions under which a product or standard material sample can be treated in a repeatable way.
Usually the tear is initiated with a cut or notch in the prepared sample.
Some tear test methods use a falling pendulum to create impact, but most apply a tension, and Mecmesin meets these standards with its range of universal testers.