Custom Optical Film Casting Roller

The AstraRoll Custom Optical Film Casting Roller represents the pinacle of precision roll engineering, developed specifically to meet the zero-defect standards of the optoelectronics and display substrate industries. Operating at the initial, critical cooling stage of extrusion lines, this roller must flawlessly replicate its surface profile onto optical-grade melts without introducing micro-scratches, pinholes, or gauge variations.

Built on a completely forged alloy matrix and heat-treated to maximize dimensional stability over years of 24/7 cycles, our rollers utilize precise internal hydraulic structures to ensure homogeneous heat extraction across full web widths. Every roller undergoes stringent non-destructive testing, laser geometric calibration, and cleanroom-level micro-polishing to deliver a reliable, high-purity surface capable of processing the most sensitive optical materials.

Technical Parameter

Concentricity(Static run out): ≤0.01mm

Temperature difference on roll face: ≤0.5 degree

Surface Roughness: ≤Ra0.006μm, ≤Rmax1.0μm, ≤Rz0.2μm

Surface Treatment: Chrome Plating(thickness≥0.12mm) and polishing

Max dimension: φ2800*4200mm

Product Applications

Delivers uncompromised thermal management and surface texturing for high-end optical substrates:

Display Backlight Unit (BLU) Films: Primary casting of base films for optical diffuser sheets, prism sheets, and brightness enhancement films (BEF).

Polarizer Component Sheets (TAC/PET): High-uniformity chill casting of Triacetyl Cellulose (TAC) and specialized PET substrates for LCD/OLED panels.

Automotive Safety & Smart Glass: Extrusion of ultra-clear PVB or functional interlayer films requiring absolute optical clarity and zero wave distortion.

Touch Panel Substrates: Production of optical-grade PMMA/PC co-extruded sheets for touch screens and mobile device cover lenses.

Why Choose AstraRoll's Custom Optical Film Casting Roller?

Flawless Super-Mirror Surface (Ra≤0.005μm): Optical films have a zero-tolerance policy for surface anomalies; any micro-imperfection creates light leakage or optical refraction errors in display modules. AstraRoll employs a proprietary multi-stage diamond-slurry polishing protocol within a climate-controlled facility to achieve a pristine, defect-free mirror surface (Ra≤0.005μm) that guarantees absolute film transparency.

Micro-Level Temperature Uniformity (≤±0.2℃): Slight temperature variances across a roll cause localized differences in polymer crystallization, resulting in uneven film orientation and stress lines (rainbow patterns). Our optimized internal double-helix layout ensures perfectly balanced coolant velocities, stabilizing the face temperature within a strict ≤±0.2℃ envelope.

Exceptional Concentricity for Constant Gauge Profile (≤0.003mm): Cyclical gauge variations caused by roller runout ruin downstream coating and slitting precision. Every casting roller we produce is machined on ultra-precision cylindrical grinders to guarantee a radial runout of ≤0.003mm, maintaining uniform thickness across the entire web length even at maximum production line speeds.

Deep-Layer Hard Chrome Matrix for Extended Lifetime: Standard chrome plating can pinhole or delaminate when subjected to continuous thermal shocks and scraping blades. AstraRoll applies a specialized high-density, multi-layer electroplating process that achieves a uniform surface hardness of ≥ HRC 62, providing superior resistance to mechanical wear and polymer outgassing corrosion.

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.