Release Testing
A common test of a release liner or tape is called a peel test. This test involves the peeling of a test sample at a set speed and angle. The apparatus measures the force needed to peel the sample. The output of the test is the amount of force (grams are the typical units), average force, and peak force. Some of our release testing machines will give us graphical output plots.
The testing of release liners utilizes a standard test tape. We commonly use Tessa 7475 tape (lot number controlled) as Rayven's standard test tape. For accurate release testing with unique adhesives we can apply and test the customers actual adhesive or test tape.
We utilize the following peel testing apparatus:
- Imass - SP2000
http://www.imass.com - TMI - TLMI Peel and Release Tester
http://www.testingmachines.com
Shear properties of adhesives can be evaluated with shear testing tool. We use a PSTC unit for this test.
Color and Gloss Testing
In many coatings color and gloss are very important. This is especially true with inkjet coatings. We test these characteristics with the following tools:
- BYK-Gardner, Micro-Tri-Gloss, 20°60°85° gloss meter
http://www.byk-gardnerusa.com - ColorTec-PCM , color, whiteness and brightness testing
http://www.color-tec.com
Coating Thickness
Thick coatings such as adhesives and inkjet coatings can are tested with TMI 49-70 digital measurement tools.
Silicone release coatings are measured via on line X-Ray scanners from Spectro/ASOMA. This scanner measures both cross web and down web during the entire production run. Coating thickness reports from the scanner are available for each roll produced. We also have the ASOMA Model 200T x-ray fluorescence lab unit for discrete sample testing.
Other Testing Apparatus:
- viscosity - Brookfield
- pH - Orion 420A
- stiffness - Teledyne 150B, Taber V-5
- friction - Kayeness
- static charge - ETS
- weight - various
