Atmospheric pressure plasma for experiments

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🔹 Overview of the Atmospheric Pressure Plasma Device

This equipment is an Atmospheric Pressure Plasma (APP) system that operates through DBD (Dielectric Barrier Discharge) between positive (+) and negative (–) electrodes.
The plasma generated under atmospheric conditions consists of high-energy electrons, ions, and radicals, which modify the surface energy of materials to improve adhesion, coating pretreatment, and bonding performance.

It is particularly effective for non-polar materials such as PP, PET, and glass, where low surface energy normally causes poor adhesion.
By applying plasma treatment, the surface becomes more hydrophilic, allowing better wettability and enhanced bonding in subsequent coating, printing, or lamination processes.

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🔹 Discharge System

• Discharge Type: DBD (Dielectric Barrier Discharge, Atmospheric Plasma)
• Electrode Structure: Positive and negative electrodes generating direct discharge
• Electrode Material: Ceramic / Teflon (dielectric insulation)
• Discharge Width: Up to 370 mm
• Applicable Material Thickness: Within 3 mm
• Working Gas: Dry Air (Flow rate: 50 L/min)
• Gap Control: 2–5 mm adjustable (Up–Down system + gap regulator)
• Discharge Housing: Profile / Plastic / Bent plate structure
• Surface Treatment Performance: Approx. 40 dyne (at 10 m/min line speed)
• Overall Dimensions: 500 × 500 × 500 mm
• Safety Features: 5,000 V insulation cover and automatic protection system

Using a dielectric layer made of ceramic and Teflon, this system ensures a stable and uniform DBD plasma discharge.
The activated oxygen and nitrogen species generated in dry air effectively remove surface contaminants and introduce polar functional groups to improve adhesion and bonding strength.

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🔹 Control & Power System

• Power Type: Inverter-based high-frequency SMPS
• Input Power: Single-phase 220 V
• Power Consumption: Approx. 2 kW (Discharge current ≤ 40 A)
• Output Voltage: 10–20 kV
• Output Frequency: 20–30,000 Hz
• Configuration: Integrated SMPS + Step-up Transformer unit
• Control Interface: PLC interface with relay On/Off control
• Display & Adjustment: Current display with variable control function
• Auto Control: Built-in plasma treatment area sensor
• Controller Size: 100 × 340 × 200 mm

The power supply delivers stable high-frequency pulse voltage for uniform plasma generation.
Through the PLC interface, the device can be easily integrated into automated production lines.
The SMPS-based design maintains consistent discharge characteristics even under fluctuating voltage conditions.

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🔹 Main Applications

• PP/PET Film Treatment: Enhances adhesion for printing, labeling, and lamination
• Glass Coating Pretreatment: Improves surface cleanliness and coating adhesion before transparent coating or vapor deposition
• Bonding/Adhesive Pretreatment: Increases bonding strength in automotive, electronic, and packaging materials
• Other Uses: Surface activation for plastic injection parts, silicone, and acrylic components

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🔹 Conclusion

This DBD-type atmospheric pressure plasma system provides a clean and efficient solution for surface modification.
It replaces conventional chemical cleaning processes with an eco-friendly and cost-effective plasma pretreatment method.
The precise gap control mechanism and stable dielectric discharge structure enable uniform surface activation,
making it ideal for integration into automated industrial production lines.