PEEL TESTS
All pull up/peel tests are executed using a gallows structure mounted on a platform deck. It
contains a take-up wheel with a precisely setable peel rate. A sample holder appropriate to each
test is mounted in the force transducer, located below the deck. The peel force is continually
measured. Tape assisted peel of non self-supporting coatings can be executed by the tests
described below. |
 180° Peel Test
Both flexible and rigid substrate tests are executed
using the unit shown here. Rigid substrates are clamped onto the unit
face; flexible substrate material is clamped and tensioned on the rear
of the plate. The unit can execute peel-back tests for coatings such as
thin films, tapes, labels, and laminates. |
 90° Rigid Substrate Peel Test
The pulley-driven stage
moves laterally at the same rate as the vertical pull rate. This maintains
the 90° angle established at the test start. Aggressive tape can be used
to test thin or fragile coatings. Tests include hybrid bond pad peel and
micro-range pull up tests. For "J", "L", and gull wing bond Peel Tests. |
 90° Flexible Substrate Peel Test
By mounting the
sample on the periphery of a free running German Wheel, the coating
is peeled from the substrate. The 90° angle is maintained by the free
rotation of the wheel. Additional tests include evaluation of the adhesion
uniformity of tapes and labels. |
