Custom Corona Treater Silicone Roller

The AstraRoll Custom Corona Treater Silicone Roller is a high-insulation component developed for film blowing, casting, and coating lines utilizing surface surface activation systems. Acting as the dielectric barrier covering the grounded core, this roller withstands the constant bombardment of high-voltage electric arcs used to alter film surface tension without suffering from carbonization, cracking, or edge burns.

Utilizing an advanced seamless extrusion and curing method, the silicone layer is entirely free of microscopic air pockets and physical inclusions. This prevents localized current concentration and dielectric pinholes, maximizing operational life and securing a flat, predictable cross-web corona discharge footprint.

Technical Parameters

Surface Insulation Material: Premium Corona-Grade Ozone-Resistant Silicone Matrix

Dielectric Strength / Resistance: ≥10 - 25kV Voltage Breakdown Protection (100% Spark Tested)

Ozone Resistance Level: High Concentration Exposure (Zero cracking or hardening)

Core Base Shaft: Heavy-Wall Seamless Steel Tube / Dynamic Balanced Core

Hardness Spectrum: 65 Shore A – 75 Shore A (±3 Shore A strict tolerance)

Total Indicator Runout (TIR): ≤0.005 mm (CNC ground to eliminate air gap variations)

Dynamic Balancing Level: ISO 21940 Grade G2.5 standard for high-speed line tracking

Thermal Operating Envelope: Continuous performance from -40℃ up to +250℃

Applications

Film Extrusion Casting Lines: Operating inline past chill rolls to treat BOPP, PET, PE, and PVDF films prior to winding.

Precision Coating Machinery: Surface-activating release sheets, siliconized liners, or metallic foils to optimize adhesive anchoring.

Flexible Packaging Printing: Serving as the ground backing roller on high-speed flexographic or rotogravure printing line treaters.

Why Choose AstraRoll's Corona Treater Silicone Roller?

100% Spark Tested High-Dielectric Insulation: Pinholes or micro-voids in silicone cause immediate high-voltage current grounding, burning through the roller and halting production. AstraRoll subjects every roller to extreme high-voltage spark testing, ensuring zero electrical leakage and long-term dielectric performance under continuous loads.

Proprietary Ozone and Heat Armor Formulation: Corona discharge generates large volumes of destructive ozone (O₃) and high thermal energy. Our highly cross-linked silicone matrix resists ozone oxidation, eliminating surface cracking, tackiness, or structural decay adjacent to high-output electrode heads.

Sub-Micron Runout Precision for Even Discharge (≤0.005mm Runout): Any runout variance shifts the critical air gap between the electrode and the film, causing uneven surface treatment. We utilize CNC cylindrical grinding to restrict total indicator runout (TIR) to ≤0.005mm, guaranteeing uniform dyne levels across the web.

Pore-Free Seamless Outer Face: Manufactured via automated monolithic casting to eliminate internal seams. This removes structural weak points, providing an ultra-flat surface footprint that protects thin-gauge optical and electronic films from puncture defects.

Q1. Are you a trader or direct factory?

We are a direct manufacturing factory with over 20 years of expertise in high-end industrial rollers, casters and material handling solutions. Our facility operates with ISO-certified quality management systems, allowing us to maintain full control over production cycles and quality standards. Throughout two decades of growth, we have established deep, long-term strategic partnerships with several listed companies and global automation leaders, proving our reliability as a high-tier industrial supplier.

Q2. What are your main products?

AstraRoll specializes in the engineering and production of three core product lines: Industrial Rollers, Heavy-Duty Wheels, and Precision Casters. We do not just sell components; we provide integrated movement and transport solutions. Our products are widely utilized across high-demand sectors, including: New Energy, Lithium Battery, Mining, Heavy Industry, Medical Institutional, Agriculture and Logistics.

Q3. What about delivery time?

We deeply understand that project timelines are critical.
Standard Products: Usually dispatched within 7–15 working days if the components are in stock.
Customized/OEM Orders: Depending on the complexity and volume, the lead time typically ranges from 20–35 days. This includes time for technical drawing confirmation, specialized tooling, and rigorous pre-shipment testing.
Shipping Methods: We offer flexible global logistics solutions, including FOB and CIF terms. We ship via Sea Freight (for bulk industrial orders), Air Freight (for urgent project needs), and International Express (DHL/FedEx/TNT) for smaller components or samples.

Q4. How can I get a quote for customized products?

Since a significant portion of our business involves specialized engineering, pricing is tailored to your specific technical requirements. To provide an accurate quote, please provide the following details: Technical Drawings or Sketches, Application Environment, Quantity, Special Requests. Our engineering team typically reviews and responds to custom inquiries with a formal quotation within 24–48 hours.

Q5. What is your payment?

TT / Paypal / Western Union / LC / Credit Card etc. are all available to us.