Tube Corona Treater

A tube corona treater is a precision inline surface modification system engineered to elevate the surface energy of continuous plastic extrusions-including tubes, pipes, hoses, and profiles-to a minimum of 38 to 50+ dynes/cm, ensuring permanent adhesion for printing inks, solvent-based glues, extrusion coatings, and inline laminations.

Conformal Electrode Geometry: Custom-machined dielectric quartz or ceramic sleeve assemblies match exact circular, oval, or multi-void profile cross-sections to maintain a uniform 1.0 mm to 2.0 mm air gap.

Forced Ozone Extraction Manifold: Integrated stainless steel exhaust shroud captures ozone directly at the ionization zone, maintaining workspace emission thresholds below 0.1 ppm.

Digital IGBT Power Regulation: Pulse-width modulated transistorized generators provide steady output power independent of ambient humidity and line speed fluctuations.

Integrated Safety Interlocks: Hardware-level monitoring disconnects high voltage instantly upon exhaust airflow failure, cabinet door opening, line stoppage, or electrode thermal overload.

Discharge Station Enclosure: Cast aluminum or heavy-gauge stainless steel housing with hinged access doors and rapid-release dielectric roll cartridges.

High-Voltage Transformer: Resin-potted step-up transformer delivering up to 15 kV output with forced air cooling and thermal cut-off protection.

Roll & Mandrel Assembly: Silicone-sleeved backup rolls or non-conductive ceramic support mandrels preventing backside treatment and substrate arc-through.

Operator Control Panel: PLC-driven touchscreen interface displaying real-time power consumption, kilowatt-hour dosage, electrode current draw, and fault diagnostics.

Supported Substrates: Polyethylene (HDPE, LDPE, LLDPE), Polypropylene (PP), Polyvinyl Chloride (PVC), Polyamide (PA/Nylon), Polyurethane (TPU), and Fluoropolymers (PVDF).

Surface Tension Target: Raises untreated low-energy polyolefin surfaces from 30 dynes/cm to 42+ dynes/cm for polar liquid affinity.

Exclusion Conditions: Excessive surface moisture exceeding 0.5% humidity, conductive metallic reinforcement layers without insulated isolation, or severe wall-thickness eccentricity causing localized dielectric breakdown.

Standard Extrusion Tier: Operates continuously from 1 to 50 m/min for thick-walled industrial pipes and corrugated conduits requiring deep molecular cross-linking.

High-Speed Packaging Tier: Sustains speeds from 50 to 150 m/min for thin-walled medical tubing, drinking straws, and cable jacket branding lines.

Dosage Calculation Formula: Energy Density (W•min/m2) = Total Output Power (kW) * 60 / [Line Speed (m/min) * Treatment Width (m)].

Inkjet Coding & Branding: Pre-treats high-speed plastic conduit and automotive wiring harness tubes to anchor solvent and UV-curable identification inks.

Medical Tubing Assembly: Prepares polyurethane and silicone catheter surfaces for solvent-welding connectors and multi-lumen bonding.

Automotive Weatherstrip Extrusion: Activates EPDM and TPV rubber/plastic hybrid profiles prior to flocking and self-adhesive tape application.

Composite Pipe Manufacture: Modifies multilayer barrier pipes before adhesive tie-layer extrusion and outer protective jacketing.

Custom Electrode Profiles: Engineering teams design CAD-matched split electrode shells based on client 2D/3D profile DXF drawings.

Enclosure Footprint: Compact modular chassis configurations engineered for tight retrofitting into existing extrusion cooling troughs or puller units.

PLC Integration Protocols: Supports hardwired 24VDC remote start/stop, 0-10V / 4-20mA speed-following proportional control, Profinet, and Modbus TCP fieldbus communication.

Mechanical Mount: Rigid bridge mounting directly onto extrusion floor stands between the vacuum sizing tank and the caterpillar puller.

Ventilation Hookup: Requires connection to facility exhaust ducting rated at a minimum static pressure of 1,200 Pa and air volume of 300 m3/h.

Electrical Commissioning: On-site verification of earth grounding resistance below 4 ohms, high-voltage insulation testing, and resonance tuning of the generator output stage.

Determine Substrate Chemistry: Identify polymer type and baseline dyne level using standard test inks.

Calculate Required Power: Multiply maximum line speed ($m/min$) by treatment perimeter width and target energy density coefficient.

Select Electrode Architecture: Choose between standard cylindrical quartz tubes or custom split-profile blocks depending on extrusion geometry symmetry.

Verify Generator Sizing: Add a 20% safety margin to calculated wattage to accommodate high ambient temperature and line speed acceleration ramps.

Export Crating: Fully enclosed, fumigation-free ISPM 15 compliant plywood crates with internal shock-absorbing elastomer mounts.

Environmental Protection: Vacuum-sealed moisture barrier bags containing active silica gel desiccant packs protecting sensitive high-frequency electronics.

Included Documentation: Comprehensive English technical manuals, electrical schematic diagrams, PLC program backup files, and factory calibration certificates.

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