Frequently Asked Questions about our plasma technology

For the Nearfield and Nearfield Needle Modules, the optimum working distance is 0.5 - 2 mm, for the Needle Module 2 - 5 mm, for the Standard Module 2 - 10 mm and for the Multigas Module 2 - 20 mm.

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The decrease in time of plasma activation (hydrophobic recovery) varies greatly. It is based on three main influencing factors: the plasma treatment (e.g. selection of process gas and plasma solution), the nature of the treated substrate and the storage conditions (e.g. temperature, relative humidity). Accordingly, further processing should take place as soon as possible after plasma treatment.

Due to the low temperature of the generated plasma, an overtreatment as it often occurs with conventional plasma systems due to thermal stress is not possible with most modules. Only with the needle module is there a higher concentrated temperature input.

The treatment width depends on the process gas used. When using compressed air, an average treatment width of 2 - 29 mm is achieved, depending on the module. With nitrogen, treatment widths of up to 50 mm are possible. Larger treatment widths are also possible by arranging several units.

The recommended gas flow through the unit is 8 - 20 sl/min. The extraction rate should be approximately ten times the total gas flow. Thus, the extraction rate should be at least 6 m³/h.

The LEDs directly access the internal electronics of the unit. With this solution, a separate pin is required for each signal. However, with the digital BUS communication it is also possible to read out the error messages in detail directly via the communication line.

The time taken for plasma activation to decrease (hydrophobic recovery) varies greatly. It is based on three main influencing factors: the plasma treatment (e.g. selection of process gas and plasma solution), the nature of the treated substrate and the storage conditions (e.g. temperature, relative humidity). Further processing should therefore take place as soon as possible after plasma treatment.

Both are possible. The control depends on the individual integration solution. In the case of the simpler communication by means of switching signals, each device must be provided with its own communication line and controlled with its own switching signals. When using digital bus communication via the CANopen protocol, the devices can be provided with short communication lines (“daisy-chain”) and only one “long” communication line is required. The control of individual devices, groups or all devices simultaneously can then be solved in many ways by the customer via programming.

In the case of the Standard and Nearfield Modules, the plasma discharge is strongest at the corners, which can negatively affect the homogeneity of the plasma treatment. By rotating the module, a more uniform treatment of the substrate is achieved. For optimum homogeneity at maximum treatment width, please select an angle of 45°. For optimum homogeneity at maximum treatment intensity, please select an angle of 14°/76° (depending on the direction of travel).

Basically, all materials can be treated with the PiezoBrush PZ3-i. However, the correct module must be selected depending on the material; the conductivity of the material or assembly is decisive here. For non-conductive materials such as most plastics, the Standard or Needle Module is used. For conductive materials such as metal, on the other hand, the Nearfield or Nearfield Needle Module is used. If conductive materials are covered by non-conductive ones, treatment with the Nearfield or Nearfield Needle Module should also be considered.

Due to the low temperature of the generated plasma, an overtreatment as it often occurs with conventional plasma systems due to thermal stress is not possible with most modules. Only with the needle module is a more concentrated temperature input possible.

The highly efficient plasma discharge requires very little power and is therefore harmless even when in contact with skin. A risk due to resulting gas emissions can be excluded by operating the device with an appropriate extraction unit. Ozone quantities of more than 0.2 mg/m³ can be generated.

For ordinary surface activation or fine cleaning to increase the wettability of a surface, the diffuse mode of operation is suitable, in which the plasma interacts with the substrate surface without any further measures. If one wants to remove an organic layer on the substrate, a so-called cathodic cleaning by means of a transferred arc is suitable. By grounding the substrate, the nozzle no longer acts as the cathode, but the substrate itself. Due to the greatly increased intensity of the treatment, thin layers of paint, for example, can be removed.

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In the simplest case, you will achieve good water wettability (72mN/m), which you can test with a simple water ink. Of course, there are also special test inks for a more precise analysis.

Yes, operation is possible with industrial compressed air or nitrogen via a standardized Festo hose connection. The operator only has to ensure the appropriate gas flow in the range between 30-70 slm. A Festo MFM (Mass Flow Meter) can be used for this purpose, for example.

Since the most important process parameters are speed and nozzle-susbtrate distance we determine these in close coordination with the process owner. If changes have to be made to the parameters of the high voltage source these can simply be accessed via the communication interface.

The treatment width of the PlasmaBrush PB3 system ranges between 15 and 25 mm for one pass. Larger widths can either be achieved by the use of additional plasmagenerators or by meandering which is easily possbile due to high process speed and lightweight plasma head.

The standard communication is via CANopen. However, control via USB interface is also possible. We would be pleased to support you with the integration into your plant, e.g. with the control via Profi-Net, Profi-BUS, EtherCAT.

Do not reach into the plasma flame during operation. The system can easily be integrated into the emergency stop circuit. The resulting emissions must be extracted, for this we recommend a volume flow of about 30m³ per hour.

For ordinary surface activation or fine cleaning to increase the wettability of a surface, the diffuse mode of operation is suitable, in which the plasma interacts with the substrate surface without any further measures. If one wants to remove an organic layer on the substrate, a so-called cathodic cleaning by means of a transferred arc is suitable. By grounding the substrate, the nozzle no longer acts as the cathode, but the substrate itself. Due to the greatly increased intensity of the treatment, thin layers of paint, for example, can be removed.

For ordinary surface activation or fine cleaning to increase the wettability of a surface, the diffuse mode of operation is suitable, in which the plasma interacts with the substrate surface without any further measures. If one wants to remove an organic layer on the substrate, a so-called cathodic cleaning by means of a transferred arc is suitable. By grounding the substrate, the nozzle no longer acts as the cathode, but the substrate itself. Due to the greatly increased intensity of the treatment, thin layers of paint, for example, can be removed.

In principle, all materials can be treated with the PlasmaTool. With conductive materials, a particularly effective treatment can be carried out by transferring the arc.

The handling of the PlasmaTool is designed for simple operation and the safety of the user. The two-hand operation and the warning light protect the user and third parties. A risk due to gas emissions can be excluded by operating the PlasmaTool with an appropriate extraction unit or good ventilation of the working area.

The MediPlas system consists of the reactor and the driver. The MediPlas Reactor generates reactive oxygen and nitrogen species (RONS). The MediPlas Driver serves as a high-power voltage source for the MediPlas Reactor.

The MediPlas Reactor is more than a simple ozone generator. By feeding in different input gases, different output gases can be generated. In addition, the concentrations of the output gases can be adjusted by setting the energy, temperature and amplitude.

When oxygen is supplied, ozone with a high concentration is produced. When dry air is supplied, ozone and nitrogen oxides are produced. When humid air is supplied, ozone, nitrogen oxides and hydrogen peroxide are produced.

If you want to learn more, please visit our website Corona Plasma Treatment Machine.