The chemical composition of the plasma has a great influence upon the functionalization given to the surface.
In CPI plasma stations, the chemical composition of the plasma is precisely controlled (at a hundredth of a percent). This allows a rich chemistry and a wide range of applications.
A corona station only uses ambient air for creating a plasma: its chemical composition is fixed (N2/O2 - 80/20) and its humidity rate is constantly varying.
Corona treatment gives sufficient performances for some applications. Nevertheless, it has several limits and drawbacks:
It can generate only one type of treatment: oxidant and heterogeneous:
• It is aggressive for the surface and breaks the substrate molecular structure: the consequence is a short lifetime of the treatment and the possible creation of a low cohesion layer
• Because of this short lifetime, the next transformation must be done immediately after the corona treatment
• The power is the only parameter that can be modified, this is not always enough to obtain the needed performances
These features impose limits to the performances and applications of corona treatments.
- In CPI plasma stations, the chemical composition of the gas is automatically adjusted depending on the substrate, the functionalization and level of performance required:
• Higher performances : the purity and chemical composition of the gas we use enable us to obtain tailored and efficient functionalization
• Longer lifetime: The treatments are homogeneous and do not damage the substrate. This is why they can last several days, month or even years, depending on your need.
• Storage becomes possible: since the functionalization is stable in time, it is not necessary to do the next transformation immediately after treatment.
• Our stations are capable of doing corona treatments (when higher performance is not requested): in this case, the treatment is performed with ambient air.
These advantages of performance, diversity and adaptability allow CPI cold plasma stations to create innovative solutions for a large field of applications.