Contact angle measurement

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What is determined with this method?

  • determination of the contact angle at an interface between a liquid deposited as a drop on a solid surface and the solid surface using drop shape analysis
  • contact angle is a measure of the wettability of a solid surface by a liquid

Measuring range

  • contact angle: 0° - 180° (± 0,1°)
  • drop dosing from 1 µL possible
  • frame rate: up to 52 frames per second
  • 4 dosing modules, software-controlled

What is evaluated with this method?

  • evaluation of the wettability of a solid by a liquid
  • evaluation of the intensity of interactions or the phase contact of a solid surface and a liquid
  • based on this, estimates can be made regarding: hydrophobic/hydrophilic properties, barrier properties, absorption capacity and processability (e.g. gluing, printing, coating, painting, cleaning)

Examples of application of the method by material

  • assessment of the wettability of papers, coatings, foils with e.g. printing inks, adhesives, paints
  • evaluation of the bondability with water-based dispersion adhesives

What insights do customers gain about your products/samples with this method?

  • wettability of samples
  • printability with (special) inks
  • water absorption capacity of samples

In which company or process area are these methods applied?

  • company: product development, research

Which problems can this method solve / recognise at the customer?

  • checking desired/specifically adjusted surface properties of products

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