Mechanical analyses

OTC can carry out various mechanical analyses for you. Please find below a list with the various options. The possibilities include analysing the mechanical characteristics of tensile strength and elastic modulus as well as seal strength and coefficient of friction.

Tensile testing

ISO527-3; ASTM D882

Using a tensile strength tester, the mechanical characteristics such as tensile strength, stretch (strain), yield and elastic modulus of a foil are measured. The tensile strength is the maximum force that can be exerted from the foil and the stretch is the percentage with which the foils can be stretched. The yield strength or yield point is understood to mean the flowing point: plastic deformation occurs from this point onwards and the foil can no longer return to its original form. Together with the elastic modulus (Young’s modulus), this is a measure for the rigidity of a foil.

Elmendorf Tear Resistance

ISO6383-2; ASTM D1922

The Elmendorf Tear Resistance determines which force is needed to tear the foil further after initially making a small cut in the foil.

Puncture resistance

EN14477; ASTM D5748

The puncture resistance determines the force and energy needed to press a needle or globe through the foil under certain conditions.


(dynamic impact tester) ASTM D4272-85

This test determines the energy and force needed to push through the foil in which a dart drops through the foil from a certain height.


The shrinkage of products can be determined in longitudinal direction and in transverse direction. This is done by heating a piece of foil and subsequently, by measuring the shrinkage in both directions.

Seal strength

Initially, a seal is made using a foil and subsequently, the strength of the seal is determined using a tensile strength tester.

Hot Tack

DIN55571-2; ASTM F1921

By means of hot-tack measuring, we can determine the ‘heat’ seal strength. This is important when a seal is already taxed before it cools down.


(Coefficient of Friction) ISO8295; ASTM D1894-11

The coefficient of friction indicates to which extent a foil is smooth or rough. The static coefficient of friction provides an outcome during the start of movement and the dynamic coefficient of friction provides an outcome of the moving friction.