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Improving Adhesion with Plasma Treatment

The Dyne Technology engineers have well over 40 years practical industry experience and have established a reputation as the trusted advisers for the Plasma Treatment of Plastics throughout many industries.  Across many industries, from Extrusion to Education, Manufacturing to Medical Plastics, the Plasma Treatment of plastics, ceramics and glass has provided an innovative solution to solving the problems of adhesion.

Plasma Treating

Obtaining good adhesion of coatings, paints, glues and sealants to traditionally “non-stick” plastics is at best difficult but often impossible. It is found that coatings and paints will not stick and gaskets will not bond without the use of environmentally damaging volatile solvent based primers and pre-treatments.

The Plasma Treatment of plastics, composites, ceramics and metals has become an extremely important, cost effective and environmentally friendly step during manufacturing processes prior to bonding, printing, painting, varnishing and coating.

Why is achieving a strong bond so difficult?

A wide variety of polymers, for example polyolefins have a very low surface energy resulting in adhesion being at best, very difficult but often impossible. These low surface energy materials do not have a strong chemical attraction with the adhesive or sealant being used, meaning a strong bond or coating is extremely difficult to achieve.

Plasma Treatment Surface Activation

A higher surface energy of the solid relative to the liquid, for example the glue or adhesive’s surface tension, results in a greater molecular attraction and as a result, adhesives, paints and inks are drawn closer to the material creating a higher bond strength.

If the solid’s surface energy is lower relative to the surface tension of the liquid, for example the glue or adhesive, the coating is repelled as a result of the weak levels of attractive forces. The Dyne Technology team has over 40 years practical industry experience and have seen first-hand that this is a problem commonly faced by engineers and manufacturers when at the printing, adhesion, painting, coating and bonding stages of production.

Plasma Treatment technology has provided engineers and manufacturers with a cost effective, efficient, versatile and flexible process to increase the surface energy of an increasing range of substrates.

How do we do it?

Atmospheric Plasma Treatment

When exposing a component to highly active plasma a highly effective and long lasting change occurs in the form of an increase in polarity also known as surface energy.

When a gas is subjected to a high energy discharge, the gas is broken up into ions, electrons, highly reactive free radicals and other excited particles.

Plasma can be described as a super ionised gas or an electrically neutral medium of both positive and negative particles alongside neutrals, which can be described as atoms, radicals and molecules which have the potential to react with a wide range of materials.

Shortly put, when you subject atoms or molecules to enough energy, the electrons around the nucleus begin to “boil off” as the temperature quickly becomes too high for them to stay contained in orbit around the nucleus. When this happens, plasma surface activation is achieved. Plasma surface activation is primarily achieved by the creation of active sites on the surface of the treated substrate; this in turn increases the polarity of the treated material which significantly increases the strength of adhesion that can be achieved.

Talk to the experts…

Call us logoIf you think that Plasma Treatment has a place in your business, get in touch with the Dyne Technology team.

You can call us on +44(0) 1543 411 460 or email