Custom Neoprene Rubber Banana Roller for Web Wrinkle Removal

The AstraRoll Custom Neoprene Bowed Spreader Roller (widely known as a Banana Roller or Bowed Roller) is a highly specialized, precision-engineered component designed to eliminate web wrinkles, prevent material overlapping, and maintain uniform lateral tension during continuous roll-to-roll processing.

At high production speeds, traveling substrates—such as ultra-thin plastic films, flexible packaging materials, paper webs, and textiles—are highly prone to longitudinal creasing and center slackness. Our bowed spreader rollers feature a scientifically calculated curved axis that generates a gentle, continuous outward traction force from the center of the web toward both edges.

By cladding this high-precision curved mandrel with a premium Neoprene (Chloroprene Rubber / CR) elastomeric sleeve, AstraRoll delivers a highly durable de-wrinkling solution. Neoprene provides exceptional resistance to thermal stress, ozone cracking, and aggressive process chemicals, making this banana roller the industry standard for demanding converting, printing, and textile processing lines.

Technical Parameter

Product Framework: Precision Fixed-Bow / Variable-Bow Spreader Roller (Banana Roller)

Sleeve Elastomer: Premium Industrial-Grade Neoprene (CR / Chloroprene Rubber)

Internal Shaft Construction: Heavy-wall, high-tensile curved steel mandrel with segmented precision bearings

Hardness Window: 50 Shore A - 75 Shore A (±3 Shore A strict control window)

Bow / Curvature Ratio: 1\% - 4\%Bow Curve (Customized to web thickness & tension profiles)

Bow Adjustability: Available in Fixed Bow (preset curvature) or Variable Bow (adjustable angle gear)

Face Length Capacity: Up to 3,500mm (Fully customized for narrow to wide-web machinery)

Working Temperature: Continuous, stable service up to 110℃

Bearing Type: Double-sealed, low-friction, high-speed segmented ball bearings

Applications

Wrinkle and Crease Elimination: Instantly flattens longitudinal wrinkles, baggy centers, and slack edges in flexible plastic films (BOPP, PET, PE), aluminum foils, specialty papers, and non-woven fabrics during continuous winding.

Sub-Slit Separation: Installed immediately after slitting knives and right before the rewind station. The outward spreading action keeps multiple slit ribbons perfectly separated, preventing interweaving, overlapping, and edge-clashing on the rewinding shafts.

Tension Equalization & Web Alignment: Corrects lateral drifting and balances uneven material tension across the web width before entering sensitive processing zones such as dryer ovens, laminating nips, or printing cylinders.

Harsh Chemical & Wet-Processing Web Guiding: Thanks to the robust chemical properties of Neoprene, this roller is highly reliable in wet processing environments, including textile dyeing and finishing ranges, paper sizing, and acidic/alkaline chemical coating lines.

Why Choose AstraRoll's Neoprene Bowed Spreader Roller?

Elite Neoprene Sleeve Resists Chemical & Solvent Swelling:

Industrial converting lines often expose rollers to aggressive coatings, washing agents, and solvents. Our proprietary Neoprene compound exhibits high immunity to swelling, oil absorption, and chemical degradation, maintaining a stable outer diameter and consistent friction coefficient over years of service.

Ultra-Low Startup Inertia Protects Ultra-Thin Webs:

The curved core contains a precision-aligned series of low-friction, double-sealed ball bearings. This allows the outer sleeve to rotate effortlessly under extremely low web tension, ensuring that even delicate optical films or thin copper foils can drive the roller without scratching, scuffing, or tearing.

Mathematically Engineered Bow Profiles for Stress-Free Spreading:

Too much curvature can overstretch film margins, while too little fails to eliminate wrinkles. Every AstraRoll banana roller's bow angle and face length are mathematically customized to your specific substrate gauge, operating speed, and web tension, ensuring crisp, flawless flattening.

Advanced Heavy-Duty Seals Halt Dust and Liquid Ingress:

Textile fibers, paper dust, and splashed liquids can easily jam internal bearings, causing the roller to lock up. We protect our inner segmented bearing array with multi-lip labyrinth seals, preventing contamination and ensuring ultra-quiet, maintenance-free rotation at extreme velocities.

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.