The items to be tested of release film include: the color, appearance, curl, thickness, dry solids, surface resistance, peeling force, residual adhesion, and aging test of the release film, totaling 9 items. Color, appearance, curliness, and thickness can be easily measured with a simple naked eye and caliper, while dry solid content, surface resistance, and aging test are mainly electrical characteristics that are not required for general industrial applications, so they can be neglected. So, the testing of release membranes will mainly focus on the detection of release force.

So how should the release force of the release membrane be tested? There are many materials on this topic online, here is a brief list of methods:

Release force test process:

1. Take TESA7475 tape with a width of 25.4mm and a length of 200mm and apply it to the test surface of the film, and use a 2KG standard hand roller to repeatedly compact it three times.

2. Install the material onto the fixture and test the tape using a tensile machine at a 180 degree angle. The data displayed on the computer of the tensile machine is the release force (g/in) of the test piece, and the average of 5 values is the test result.

3. Apply Double-sided tape to the non test surface of the sample and fix it on the standard steel plate for testing; There is manpower available.

4. After applying the tape, let it stand for 20 minutes, and the temperature and humidity in the laboratory should be controlled at 23 ± 2 ℃ and 50 ± 5% respectively.

It is necessary to use materials that are not easily adhesive for release membranes. In short, according to different applications, long-chain alkyl or siloxane type adhesives are generally used.

Because release agents are transparent, most people overlook the reality that release agents are the behind the scenes heroes of protective films/tapes, silently ensuring the normal functioning of the tape behind the scenes.

Although the materials used vary according to the expected use of the tape, they typically contain long-chain alkyl or siloxane release agents.

Regarding specific electronic applications, it is necessary to develop release skills for using non organic silicon release membranes, as organic silicon release membranes can have adverse effects on electronic components.

The above is a summary and sharing by Reechas, a release film manufacturer of release film.