Narrow Web Corona Surface Treatment for Perfect Label Printing

Narrow Web Corona Surface Treatment for Perfect Label Printing

Because our customers demand more than just good enough.

If you're in the label printing business, you already know — print quality is everything. Your customers expect sharp graphics, vibrant colors, and strong durability. But when you’re printing on plastic or foil-based substrates, achieving reliable ink or lacquer adhesion isn’t always easy. These materials have low surface energy, making it difficult for inks, coatings, and adhesives to bond. The result? Smudging, peeling, or fading — and that’s bad for business. At Eltech Engineers, we design compact, high-performance corona treaters specifically for narrow web label flexo printing presses. Our systems use high-definition ridge-type ceramic electrodes that deliver precise, uniform treatment on both metalized and non-metalized substrates. To create a label that’s not just eye-catching but also long-lasting, surface preparation is critical. Corona treatment modifies the substrate’s surface tension, allowing inks and coatings to anchor securely. But precision matters — too little treatment results in poor adhesion, while too much can damage the substrate. That’s why Eltech systems are built for controlled, consistent performance every time.

Label Flexo Corona Treater

Our corona systems are designed for fast installation on a wide range of narrow web printing and converting machines. Compatible with most Indian and international press brands, including:
Indian OEMs
Multitec • Webtech • Jandu Engineers • Alliance Printech • Autoprint • RK Label • Sahil Graphics • SR graphics • Vinsak
Global Brands
AB Graphic Intl. • HP Indigo • Nilpeter • Mark Andy • Comco • Omet • Gallus • Bobst • Edale • Gidue • MPS • Xeikon • Focus Label • Delta ModTech • Rotatek • Lombardi • Weigang

Label Flexo Corona Treater
Label Flexo Corona Treater

  • Advanced Power Technology

    • Our corona treaters are powered by ultra high-frequency IGBT-based technology, delivering unmatched reliability and precision:
    1. Ultra High-Frequency IGBT Inverter for stable and efficient corona discharge
    2. Digital Display of Corona Current for real-time monitoring and fine control
    3. Oil-Cooled Transformer provides high thermal stability and robust insulation
    4. High-Tension HV Cables ensure safe, efficient high-voltage transmission

  • Efficient Ozone Extraction & Cooling

    • Eltech systems incorporate a dual-function design for ozone removal and active cooling, ensuring consistent performance and longer equipment life:
    1. Even Suction Across Treatment Area for effective ozone extraction
    2. Electrode Cooling System to reduce wear and maintain discharge stability
    3. Blower-Based Cooling prevents electrode warping and ensures uniform treatment
    4. Forced Convection Inside Panel protects electronic components from overheating

  • Smart Safety & Monitoring Features

    • Engineered for peace of mind, Eltech corona treaters feature built-in smart safety systems:
    1. Zero-Speed Proximity Sensor Automatically shuts off the corona discharge when the web speed drops below the minimum threshold. This protects the treater rollers from unnecessary exposure and prevents substrate damage during stoppages.
    2. The system is equipped with a built-in Human Machine Interface (HMI) and Programmable Logic Controller (PLC) for centralized operation and monitoring.
    3. Viewing Window for safe visual monitoring of corona discharge
    4. “Set & Forget” Air Gap for consistent treatment and reduced manual adjustment
    5. Universal Mounting Frame for seamless installation on most narrow web presses

  • User-Friendly Design

    • Our systems are built for operators, with quick access, easy cleaning, and flexible installation:
    1. Cassette Electrode Assembly enables fast, tool-free cleaning of ceramic electrodes
    2. Multiple Ceramic Electrodes ensure wide, even surface activation
    3. Compact, Modular Frame (optional) for space-saving integration
    4. Industrial-Grade Construction (optional) for harsh production environments

  • Tailor-Made Configurations to match your machine and application
  • Soft Start Functionality for smooth power ramp-up
  • User-Friendly Installation with minimal press modification
  • Low Maintenance Design to maximize uptime
  • Forced-Cooled Converter for continuous high-speed operation
  • Enhanced Operator Safety built into all systems
  • Cost-Effective Treatment Process that ensures ROI
  • Compact, Streamlined Construction for retrofit or OEM builds
  • Latest IGBT-Based High-Frequency Technology for superior performance
  • MCB Protection
    Guards against short circuits and overloads to protect the system and the user.
  • Audio/Visual Alarm System
    Instant alerts through sound and light for quick fault identification.
  • Electronic Overload Trip
    Auto-disconnects during current spikes, preventing internal component damage.
  • Thermal Trip for Heatsink
    Cuts power if heatsink temperatures exceed safe levels — protects critical electronics.
  • Under/Over Voltage Protection
    Monitors input power fluctuations and suspends operation during instability.
  • Ozone Extraction Overload Trip
    Shuts down the system if the exhaust system is overloaded, protecting fans and ducts.
  • Under/Over Current Trip
    Continuously checks output current and prevents unsafe power delivery.

Please download our brochure




Corona Treater for Label Flexo Printing in Mumbai, India

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