Contact Angle Testing

Contact angle meters measure the way a liquid interacts with a solid surface, giving an accurate and informative evaluation by measuring how strongly a liquid is pulled toward the surface (wetting) by measuring the angle at which the liquid sits on the material surface.

A poor wetting material, such as PTFE will have a high angle, ball like droplet on the surface with a contact angle over 90 degrees. A material with good wetting and a contact angle of less than 90 degrees indicates the solid is pulling the liquid toward itself, a key indicator for strong adhesion.

This technique can be used and measured using the Kruss MSA (mobile surface analyser), the Ayriis and the DSA range.

While tensiometers are available to purchase, they are most commonly used in our lab along side other test methods such as Dyne Test Inks. Some find that one is better than the other, but in most cases, using a variety of test methods in an investigation allows you to build up a bigger picture about every part of the puzzle involved.

Speak with us today to find out more about your materials, or read more about it in the Knowledge Hub.