This low tack, donut-shaped piece of plastic has a 1" O.D. and a 1/2" I.D and is perfect for adhesion testing.
????Tired of struggling to remove the cut-off rings before performing your PATTI Pull Test? Annoyed by the care needed to place a cut-off ring over the pull-stub without disturbing your uncured epoxy? SEMicro Adhesive Masks are the solution.
If you are familiar with adhesion testing, you know how important it is to reproduce the area that is pulled. If a technician performed a pull-test without properly defining the area, then the epoxy would seep out from under the pull-stub and cure to the sample prior to testing. This would result in an effective pull that is larger than 1/2", and the corresponding tensile strength would appear to be higher than it actually is!