Electro Tech Industries Manufactures a complete range of Dyne Pens (which are also referred to as Corona Pens) to measure surface energy. Using a Dyne test pen gives quick and easy results indicating surface wettability. The low surface energy of polymer-based substrates often leads to poor adhesion of inks, glues and coatings.
To obtain optimum adhesion, it is necessary to increase the surface energy of the substrate to just above that of the material to be applied. Surface Treatment with either Corona or Plasma results in good wetting of the material over the surface of the substrate and so improves adhesion. For optimum adhesion when printing, gluing or coating on various substrates, it is necessary to obtain a high surface energy. Determining the surface energy can be achieved by measuring contact angle or by use of Surface Energy Test Pens (Dyne level testing).
Dyne tests measure surface wettability or adhesion. Dyne is used as a unit of force in the milli-newton per meter system of units. When using dyne tests you are capable of measuring surface tension in the units millinewtons per meter or dyne per centimeter.
When the Dyne level test pen is applied to the surface, the liquid will either form a continuous film on the surface or pull back into small droplets. If the Dyne test fluid remains as a film for 3 seconds, the substrate will have a minimum surface energy of that ink value, expressed in mN/m (Dynes). Should the Dyne test liquid reticulate or draw back into droplets in less than 1 second then the surface energy of the substrate is lower than that of the liquid itself. The exact surface energy (Dyne level) can be determined by applying a range of increasing or decreasing values of Dyne test pens.