Corona Treater

2–20KW, Siemens IGBT core, 25–40KHz, for PE/PP film & automotive sheet

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Technical Specifications

Model Range	HCT-2 / HCT-4 / HCT-6 / HCT-8 / HCT-10 / HCT-12 / HCT-16 / HCT-20
Power	2KW – 20KW
Frequency	25–40 KHz (Auto-matching load impedance)
IGBT Module	Siemens (Germany) — same module as premium European corona systems
Treatment Width	Customizable per roller width, tool-less gap adjustment to 0.1mm
Electrode	Single-side / Double-side / Enclosed Ceramic
Application	PE/PP film, EVA sheet, rubber, metal foil, woven fabric, automotive laminates
Voltage	220V / 380V / 415V / 440V (factory-configured, no external transformer)

How It Works

Corona treatment uses high-frequency, high-voltage electrical discharge to modify the surface energy of non-porous materials. Our HCT series generates 25–40 KHz alternating current through a Siemens IGBT power module, delivering it to an electrode positioned 2–5mm above a grounded roller. As the material passes through this gap, the corona discharge creates a plasma field that oxidizes the surface at a molecular level — introducing polar functional groups that dramatically increase surface tension from below 30 dyne/cm (untreated) to 45+ dyne/cm (treated). The system's Phase-Locked Loop (PLL) continuously monitors load impedance and auto-adjusts frequency to maintain optimal resonance, ensuring uniform treatment even as material thickness or line speed changes during production.

Key Features

Siemens IGBT Power Core

Genuine German Siemens IGBT modules — the same component in premium European corona systems. 25–40 KHz switching, nanosecond rise times, zero domestic substitute components.

Digital PLL Frequency Control

Phase-Locked Loop auto-matching continuously adjusts frequency to load impedance. No manual tuning. Treatment remains uniform through material changes, speed variations, and electrode wear.

HD Touchscreen with Recipe Storage

Full-color HMI displays real-time voltage, current, frequency, and power. Store unlimited process recipes with one-touch recall. Export treatment data for quality documentation.

Tool-Less Electrode Gap Adjustment

Precision mechanical adjustment allows 0.1mm repeatable gap setting without tools. No shims, no guesswork. Gap verified in seconds during changeovers.

Multi-Layer Protection System

Soft-start inrush protection, arc-over auto-shutdown, open/short circuit detection, no-ground lockout, and electrode station humidity immunity — five independent safety layers.

Factory-Configured Voltage

Pre-wired for your local 3-phase grid: 220V, 380V, 415V, or 440V. No external transformer. No on-site electrical modification. Plug-rated to your facility's supply.

Why Siemens IGBT Matters

The IGBT power module is the heart of a corona treater — it determines discharge stability, treatment uniformity, and service life. Our HCT series uses genuine Siemens IGBT modules, the same component found in European corona systems priced 2-3x higher. Combined with 25-40 KHz auto-matching frequency control and tool-less electrode gap adjustment (0.1mm repeatable), the HCT series delivers consistent dyne levels shift after shift. Factory-configured for your local 3-phase voltage — no external transformer required.

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Selection Guide

What power rating do I need?

Match power to material width and line speed: ≤500mm wide → HCT-2 (2KW); 500–1000mm → HCT-4 or HCT-6; 1000–2000mm → HCT-6 or HCT-8; ≥2000mm → HCT-8 or HCT-10. For line speeds above 80 m/min, step up one power level. For dyne targets above 45 dyne/cm, select maximum power with ceramic electrodes.

Single-side or double-side treatment?

Single-side electrode stations treat one surface per pass — sufficient for most printing and lamination applications. Double-side stations treat both surfaces simultaneously, ideal for double-sided printing, laminating, or when both sides must achieve high dyne levels. Our dual-control models (HCT-6D/8D/10D) provide two independent output channels for simultaneous double-side or dual-line treatment.

Which electrode material should I choose?

Aluminum electrodes are cost-effective for standard PE/PP film treatment. Ceramic electrodes provide longer service life and more uniform discharge distribution — recommended for high-speed lines, wide webs, and applications requiring 44+ dyne/cm. Silicone rubber electrodes are specifically designed for treating inert silicone surfaces.

What about conductive or metallized films?

Our aluminum-film (AL) special model includes enhanced short-circuit protection and arc-suppression circuitry specifically designed for conductive substrates. Standard corona treaters may fault or damage when treating metallized films — this model eliminates that risk.

FAQ

Why Siemens IGBT instead of domestic alternatives?

The IGBT module determines discharge stability and treatment uniformity. Siemens modules switch at 25–40 KHz with nanosecond rise times, producing a dense, uniform corona field. Domestic IGBTs typically operate at lower frequencies (15–25 KHz) with slower switching, resulting in streaky treatment and inconsistent dyne levels. Our HCT series uses the same Siemens module found in European corona systems priced 2–3× higher.

What dyne level can I achieve?

The HCT series reliably achieves 38–48 dyne/cm depending on material, power setting, and electrode configuration. For standard PE/PP film pre-print treatment: 40–42 dyne/cm. For premium lamination and coating: 44–48 dyne/cm. Higher levels require higher power density and ceramic electrodes.

How often do electrodes need replacement?

Aluminum electrodes typically last 2,000–4,000 operating hours before requiring re-machining or replacement. Ceramic electrodes last 8,000–12,000 hours. Silicone rubber electrodes depend on application severity but average 3,000–6,000 hours. Electrode gap should be checked monthly and adjusted if deviation exceeds 0.2mm.

Can the corona treater operate in high humidity?

Yes. Our electrode stations are designed to start and operate normally at up to 95% relative humidity. The high-frequency resonant circuit and insulated electrode housing prevent arc-over to ground even in tropical conditions. This is a critical design feature for Southeast Asian factory environments.

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