Dyne Pens - Full range of Dyne test pens to measure surface energy.

Dyne Technology supplies 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). The fluid contained within the pens is based on the ISO 8296 method for measuring the surface energy of polyethylene film.

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.

Click to read our eBook: Surface Energy Testing

Our Dyne Test Pens are based on a valve tip applicator and not the "Magic Marker" or "Felt Tip Pen" type. The Valve Tip Applicator principle is simple: Keep the testing part of the pen away from the fluid storage part of the pen (in other words, you get no wicking of contaminants from the substrate into the test fluid reservoir ). The diagram demonstrates how that is accomplished; by pressing the tip firmly down, the valve is opened and fresh fluid floods the tip; this flushes it clean, and allows the tester to lightly pass over the sample to accurately determine dyne level. Results are based on how long the test solution takes to form beads on the sample surface.

Dyne Test Pens are available in all values from 30 to 70 mN/m and are supplied in disposable pens.

Please contact us to find out how Dyne Technology can help you or to request a quote.

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