Industrial FRP Core Tubes for Copper Foil Winding | Fiberglass Core Manufacturer
Haikuo engineers high-precision FRP core tubes for electronic copper foil and lithium battery film winding, delivering strong radial strength, zero thermal deformation, and ultra-smooth surfaces. Contact us for custom industrial solutions.
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Fiberglass core tube
Haikuo’s heavy-duty FRP (Fiberglass Reinforced Plastic) core tubes are specialized winding cores built for premium industrial applications, including electronic-grade copper foil manufacturing, lithium-ion battery separators, and high-tensile metal foils. Made using continuous filament winding or high-precision pultrusion, these composite core tubes have a carefully optimized fiber orientation that delivers strong structural integrity under heavy loads.
In high-speed, high-tension winding operations, materials like paper, PVC, or aluminum often fail from structural deformation, moisture absorption, or chemical corrosion. Haikuo’s fiberglass core tubes provide a lasting, high-strength alternative. With a flawless outer surface finish and tight dimensional tolerances, they prevent foil wrinkling and material waste, boosting production efficiency and winding precision.
Operational Benefits of Haikuo FRP Core Tubes
- High Precision, Tight Tolerances: Built with tight concentricity and dimensional stability to eliminate vibration and keep winding smooth at very high speeds.
- Strong Radial Compression Strength: Withstands intense inward crushing pressure from thousands of layers of tightly wound heavy metal foil without structural deflection.
- Smooth, Anti-Wrinkle Surface: The outer diameter is precision-ground and polished to an ultra-smooth finish, preventing damage or indentation to the first layer of copper foil.
- Chemical and Corrosion Resistance: Fully resistant to aggressive industrial chemicals, oils, and environmental moisture, removing the risk of structural rotting, rust, or oxidation.
- Zero Thermal Deformation: A very low coefficient of thermal expansion keeps the tube straight and dimensionally stable, even through variable heat curing or drying processes.
Standard Dimensions & Technical Specifications
The table below lists our standard dimensions for industrial winding applications. We also offer full customization of internal/external diameter, total length, surface hardness, and resin formulation (including anti-static coatings) to match your processing machinery exactly.
| Item | Parameter |
| Specification | 3”, 6”, 11”, 13”, 6”-13”, 6”-18” |
| Maximum length | 3M |
| Tolerance in length | ±1mm |
| Tolerance in diameter | ±0.3mm |
| Roughness of surface | Ra＜1.6um |
| Hardness of surface | ＞30°Barcol |
| Max allowable temperature | 75℃ |
| Roundness | ＜0.1mm |
| Straightness | ＜0.11mm/1450mm |
| Axial anti-modulus | Ex=160,000Kgf/cm2 |
| Surface impedance factor | A type ＜107Ω |
| B type | Insulation surface |
What Makes FRP Core Tube Advantageous?
FRP core tube offers several advantages over other core materials such as wood, paper, or metal, including:
High Strength. FRP core tube material has high tensile strength and modulus, allowing it to withstand high loads and stresses without deforming or breaking.
Circularity and Straightness. Its excellent circularity and straightness ensure smooth, uniform winding of thin foil materials without wrinkles or gaps.
Antistatic. Its antistatic properties prevent static buildup and discharge that could damage thin foil materials or create fire hazards.
Semi-Permanence. The material can be reused multiple times without losing performance or quality, reducing both waste and the cost of core materials.
What Specifications and Uses Does FRP Core Tube Support?
FRP core tube is available in different specifications depending on the application and customer requirements, including:
·For secondary battery copper foil winders (cathode): available in 6㎛, 8㎛, 10㎛, or 20㎛ thickness, used to wind the copper foil that serves as the cathode (negative electrode) of the secondary battery.
·For secondary battery aluminium foil winders (anode): available in 10㎛, 12㎛, or 15㎛ thickness, used to wind the aluminium foil that serves as the anode (positive electrode) of the secondary battery.
·For separator winders (separation membrane): available in any thickness, used to wind the separator that forms the separation membrane between the cathode and anode of the secondary battery.
·For electrode winders: available in any thickness, used to wind the electrode that serves as the active material of the secondary battery.
Industries & Winding Applications
Thanks to their durability and long reusable lifecycle, Haikuo’s fiberglass core tubes are widely adopted across high-end processing industries:
- Electronic Copper Foil Manufacturing: Used for specialized winding of ultra-thin electrolytic copper foil for multilayer PCBs.
- Lithium Battery Supply Chain: Serving as heavy-duty core rollers for battery anode/cathode foils and separator films.
- High-Precision Film Conversion: Used with optical films, solar panel protective films, and metalized packaging foils.
- Alloy & Aluminum Foils: Serving as reusable winding shafts for thin-gauge metal foils that require high linear tension control.
Manufacturing Quality & Reusable Lifecycle
Each winding tube goes through rigorous balancing, straightness verification, and hardness testing at our production facility. Because Haikuo’s composite tubes don’t splinter, crack, or deform over time, they make excellent reusable cores — lowering long-term operational costs and supply-chain waste compared to disposable cardboard or fragile plastic alternatives.
Technical Summary & Engineering Insights
Executive Summary: Haikuo high-precision FRP (Fiberglass Reinforced Plastic) core tubes are engineered to deliver ultimate radial compression strength and zero structural deformation for elite industrial winding applications, particularly within electronic-grade copper foil and lithium-ion battery separator production lines. Utilizing advanced continuous composite processing, these premium fiberglass core tubes easily withstand the immense crushing pressures exerted by high-tension foil winding, successfully preventing material wrinkling and edge misalignment. Unlike fragile cardboard cores or heavy, high-maintenance metal rollers, Haikuo composite winding tubes offer absolute chemical immunity, an ultra-smooth ground surface finish, and a highly reusable engineering lifecycle. They are fully customizable in dimensions, wall thicknesses, and specialized anti-static formulations, serving as the definitive global standard for modern high-speed, zero-defect foil processing industries.
| Critical Winding Parameters | Haikuo FRP Core Tube | Industrial Cardboard Core | Aluminum/Steel Rollers |
|---|---|---|---|
| Radial Crushing Resistance | Ultra-High (≥135 Mpa) | Extremely Low (Collapses easily) | High (Subject to permanent bending) |
| Moisture & Chemical Immunity | 100% Waterproof & Chemical Resistant | Deforms/Swells in humidity | Corrodes and rusts over time |
| Surface Smoothness Rating | Precision Polished (Zero foil wrinkles) | Rough (Causes internal foil damage) | Good (Easily scratched or dented) |
| Thermal Expansion Control | Negligible (Stable under heat) | Poor (Degrades with temperature) | High (Warps during heat processes) |
| Reusable Engineering Lifecycle | Infinite Reuses (Zero splintering) | Disposable Single-Use | Reusable but heavy to transport |
Targeted Product FAQ
Q1: Why is a specialized frp core tube superior to standard cardboard cores for copper foil winding?
A1: High-precision electronic copper foil requires extreme winding tension to prevent layers from shifting. Traditional cardboard cores absorb ambient moisture and structural pressure, leading to inner diameter collapse and foil wrinkling. Our industrial frp core tube delivers monumental radial strength and zero thermal warping, ensuring that the first layer of foil is as pristine as the last, which seamlessly integrates with other critical pultruded fiberglass profiles on your machinery.
Q2: What surface finish treatments does Haikuo offer to protect fragile winding foils?
A2: Every fiberglass core tube destined for high-end copper foil or optical film production undergoes a meticulous outer diameter centerless grinding and polishing procedure. This removes all micro-ridges and fiber protrusions, resulting in a mirror-like finish that eliminates material indentation, scratching, or structural deformation during ultra-high-speed rolling processes.
Q3: How does the chemical immunity of fiberglass winding cores reduce long-term operational costs?
A3: In lithium battery film and metal foil processing, tools are frequently exposed to cleaning solvents, industrial oils, and varying relative humidity levels. Our premium polymer matrix ensures that the winding shafts never rust, corrode, or degrade over centuries. This total immunity allows you to reuse the exact same core tube thousands of times without failure, significantly undercutting your overhead expenses.
Q4: Can Haikuo manufacture anti-static or conductive composite winding tubes?
A4: Yes, we specialize in high-performance electrical formulations. For dust-free cleanroom environments or environments handling combustible electronic components, we can add high-grade conductive carbon black or specialized anti-static agents to the resin bath. This reduces surface resistivity and prevents static buildup during lightning-fast roll changes.
Q5: What dimensional custom tolerances can your factory guarantee for heavy-duty winding runs?
A5: As a pioneering industrial manufacturer, Haikuo holds an incredibly tight grip over structural execution. We guarantee inner and outer diameter tolerances within ±0.1mm and straightness indexes under 0.5mm per meter. If your production machinery relies on precise mechanical chucks or expanding shafts, we recommend contacting our tech consultants to align your drawings with our extensive catalog of specialized pultruded fiberglass profiles and composite roll solutions.
Production Process
Pultrusion Profile Equipment
Fiberglass placed on a shelf
Profile mold debugging
Profile cutting
Profile punching
Profile cutting details control
Profile inspection
Profile packaging
