Peripheral Equipments Corona Section

The Corona Section is a critical component in sandwich panel production lines, designed to treat the surface of metal or film materials before the foaming and lamination process. This treatment improves the adhesion between the metal sheet (or aluminum foil) and the PU/PIR foam core, ensuring long-lasting bonding and superior panel quality.

DMMET’s Corona Treatment Unit utilizes high-voltage electrical discharge to modify the surface energy of materials, enabling better chemical bonding without damaging the surface structure.

Key Features:

• Advanced corona discharge system providing uniform and stable surface treatment
  
  
• Adjustable power output to suit different material types and thicknesses
  
  
• Automatic control and monitoring for precise treatment intensity
  
  
• High-efficiency electrodes designed for long lifespan and easy maintenance
  
  
• Compact and durable design compatible with continuous production lines
  
  

Technical Specifications:

• Treatment Width: up to 1250 mm
  
  
• Power Output: 1–3 kW (customizable)
  
  
• Treatment Speed: up to 30 m/min
  
  
• Suitable Materials: Steel sheet, aluminum foil, coated film, or laminate
  
  

Advantages:

• Improves adhesion between facing materials and PU/PIR foam
  
  
• Enhances product durability and insulation performance
  
  
• Reduces delamination risks in sandwich panels
  
  
• Compatible with both PU/PIR continuous lines and discontinuous press systems
  
  

Applications:

• PU/PIR sandwich panel production
  
  
• Aluminum foil and film lamination
  
  
• Composite material surface preparation
  
  

With DMMET Corona Section, manufacturers achieve stronger bonding, higher product quality, and greater production reliability — essential for modern insulated panel manufacturing.