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Plasma cleaner effect verification evaluation test

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27 Oct,2020

Plasma cleaner effect verification evaluation test:

 

It is well known that the surface of the material treated by the plasma cleaning machine will have some subtle changes, which we can not distinguish with the naked eye. So how do we tell if the plasma-treated sample has changed? In general, there are several commonly used methods for validating effectiveness evaluation tests. The first and most direct method is to use the plasma-treated sample directly for the next process. If it meets your requirements, the plasma cleaning machine is effective. Of course, if you can not meet the requirements of the next process, we can not conclude that the plasma cleaning machine processing material is invalid. However, the treatment effect is different. Plasma surface treatment is applicable to all materials in a sense, and the treatment effect is also affected by many factors. Here are three commonly used methods to judge the effect of plasma treatment:

 

Contact Angle/edge Angle verification:

Contact Angle refers to the contact Angle between the droplet profile and the solid surface when observing the projection of a static droplet on a solid. By physical definition, surfaces with a contact Angle less than 90° are hydrophilic (wettable) and hydrophobic (non-wettable) when the contact Angle is greater than 90°. With plasma surface treatment, the contact Angle changes (becomes larger or smaller). Through the appropriate plasma process or in the plasma process process, the appropriate coating treatment. Hydrophilic surfaces convert to hydrophobic surfaces (hydrophilic coatings have the opposite effect).

 

Test ink verification:

Measuring method for estimating surface energy: If the test ink is concentrated in one place after being painted on the surface, the solid surface energy is lower than the ink, and if kept wet, the solid surface energy is equal to or greater than the liquid surface energy. By using a series of test inks with a gradient surface energy, the total surface tension of the solid can be determined. However, this method cannot determine the polar and non-polar parts of the surface energy.

 

Grid cutting test verification:

In order to check the adhesion of the coating, a mesh cutting test is performed. After painting, the paint layer of the plastic parts is cut into a mesh, then the standard tape is attached to the cutting mesh, the tape is secured, and then suddenly torn off. If there is paint on the tape, there is not enough adhesion. Cut the mesh to show the bonding strength of the paint coating on the plastic parts.

Plasma cleaner  effect verification evaluation test

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