In this week's video, Tapemark's Chemist Two, Andrew Day, discusses the different kinds of physical adhesion testing that we use for our transdermal patches. We use dynamic shear testing, and static shear testing for our physical adhesion properties. Static shear testing is what everyone has been doing for years and can sometimes be a lengthy process. Here at Tapemark, we focus more on dynamic shear testing due to the length of time it takes and the accuracy that it gives us and our clients. Watch the video to learn more about our dynamic and static shear testing.
[Transcript] "Hi, my name is Andrew day. I am a Chemist 2 at Tapemark. We do all kinds of testing in our laboratories including physical adhesion properties for our transdermals. One of the critical things that we've encountered is the difference between static shear, which is done on this fancy shear bank over here and dynamic shear, which is done on our texture analyzer. Advantages to a static shear are this is what everybody's been doing for 20 or 30 years.There's lots of data out on what a typical adhesion is for tape. Disadvantages, you can hang these patches up that I hung up yesterday, and they can still be hanging therefor multiple days. And that's why we developed dynamic shear for some of our products that are complex,and what this does is it pulls the plate up at a set speed and calculates the force on our computer. As you can see, we align the plate parallel, so it forces the patch to fall on a parallel plane and when the test finishes, you'll see if you can see close enough, you'll see that there's a little bit of adhesive left on the plate after it's done with the test. That gives us the input for the maximum value on our graph. We graph that along with five different values given the average value. Thank you."