Tear strength describes the resistance of a material to the expansion of a tear. The test setup is similar to a tensile test. The specimen is a trouser specimen or angle specimen with a defined tear length.
Peel resistance tests:
Peel resistance is measured during a pull-off test.
90° pull-off test
180° pull-off test
Roll peel test
Sealed seam test
Initial adhesion:
This characteristic, also known as a contact adhesion, is determined, for example, for adhesive labels and tape. It describes the first adhesion, known as the "initial tack" in the form of the maximum peel strength.
Examples
90° pull-off test to measure peel resistance
90° pull-off test for tape
Testing of seal seams on a yogurt cup
The peel angle remains constant.
testXpert II force travel diagram
Testing of seal seams on a yogurt cup
Unwind adhesion measurement of adhesive bondings
Determination of initial adhesion of adhesive labels in loop tack test to Finat FTM 9
180° peel test to EN 1939 and AFERA 4001
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