Live Webinar on March 13, 2025
The Stood-up Drop part III: Coatings Testing Beyond Cross Hatch
Dewetting test as a potential successor to an outdated method
Have you ever thought that the cross hatch test, as a manual, analog, and highly user-dependent procedure, is no longer up to date? We at KRÜSS certainly do. However, it is clear that a modern method for testing adhesion of coatings must be comparable with the long-established cross hatch procedure and cannot simply replace it without transition.
This 3rd part of our webinar series on the Stood-up Drop (SUD), this time in conjunction with BYK and Plasmatreat, shows why dewetting analysis with the SUD has the potential to become this new method. Extensive comparative measurements of the recently receded contact angle (RRCA) from the SUD with cross hatch data show an excellent correlation throughout.
In this webinar we will guide you through the course of these investigations, present the results and also quantify the influence of plasma treatments of the polymer substrates based on the SUD and cross hatch results.
What we are discussing
Dr. Andrew Mellor (Application Market Manager at KRÜSS) will briefly recap the learnings from part I and II about wetting and dewetting, their difference, and the SUD as a quick and easy way to measure the relevant RRCA.
He will then focus on the comparative investigation between the SUD and cross hatch tests. Dennis Winkler from Plasmatreat will explain the particular plasma treatment technique used in our study in more detail. In the following Q&A session, Dr. Mellor, Mr. Winkler, and Petra Della Valentina from BYK will answer your questions.
What know-how you will gain
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Why does it make sense to compare cross hatch results with the SUD, which captures dewetting?
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Why is the RRCA a reliable indicator for coating adhesion and the effect of plasma treatment?
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How can the strong correlation between the RRCA and cross hatch tests be used to replace the latter?
- What advantages would this replacement have?
Speakers
Petra Della Valentina is a state-certified chemical technician who has joined BYK-Chemie in 1988 in the application technology department of R&D. In 2003 she took over the position as a specialist for SFCA additives/measurement technology and from 2010 as a specialist Product Group Management Surface/Measurement technology. Since 2014, she has been working as a specialist in the field of physical measurement technology.
Dennis Winkler is part of the technical sales team at Plasmatreat. He wrote his bachelor's thesis in the Research & Development department on the subject of adhesion-promoting plasma coatings for plastic surfaces and then worked in application technology. During this time, he was able to expand his knowledge of the pretreatment of various materials, components and geometries and bring his experience to adhesive applications. This experience in application technology helps him to find the right solutions for customers.
Dr. Andrew Mellor obtained an engineering doctorate in surface and interfacial physics/chemistry from the London Centre for Nanotechnology (UCL) and currently serves as an Application Market Manager to our worldwide customer network.