Fiberglass core tube

Zhongsheng heavy-duty FRP (Fiberglass Reinforced Plastic) core tubes are specialized, high-performance winding cores engineered specifically for premium industrial applications, including electronic-grade copper foil manufacturing, lithium-ion battery separators, and high-tensile metal foils. Manufactured using advanced continuous filament winding or high-precision pultrusion processes, these composite core tubes feature a meticulously optimized fiber orientation architecture that guarantees exceptional structural integrity under extreme structural loads.

In high-speed, high-tension winding operations, traditional materials like paper, PVC, or aluminum often fail due to structural deformation, moisture absorption, or chemical corrosion. Zhongsheng fiberglass core tubes offer a permanent, high-strength solution. With a flawless outer surface finish and tight dimensional tolerances, our core tubes prevent foil wrinkling and material waste, significantly maximizing production efficiency and winding precision.

Key Operational Benefits of Zhongsheng FRP Core Tubes

• High Precision and Ultra-Low Tolerances: Engineered with tight concentricity and dimensional stability to eliminate vibration and ensure smooth winding at ultra-high speeds.
• Exceptional Radial Compression Strength: Withstands intense inward crushing pressure exerted by thousands of layers of tightly wound heavy metal foils without any structural deflection.
• Superior Smoothness and Anti-Wrinkle Surface: The outer diameter is precision-ground and polished to achieve an ultra-smooth finish, ensuring zero damage or indentation to the first layer of premium copper foil.
• Chemical and Corrosion Immunity: Totally resistant to aggressive industrial chemicals, oils, and environmental moisture, entirely eliminating the risk of structural rotting, rust, or oxidation.
• Zero Thermal Deformation: Exhibits an incredibly low coefficient of thermal expansion, maintaining perfect straightness and structural dimensions even under variable heat curing or drying processes.

Technical Specifications & Standard Dimensions

The table below showcases our standard technical dimensions for industrial winding applications. We provide fully customizable solutions regarding internal/external diameters, total length, surface hardness, and specific resin formulations (including anti-static coatings) to match your exact processing machinery requirements.

What are the advantages of FRP Core Tube?

FRP Core Tube has many advantages over other core materials, such as wood, paper, or metal. Some of the main advantages are:
High Strength. FRP Core Tube materials has high tensile strength and modulus, which can withstand high loads and stresses without deformation or breakage.
Circularity and Straightness. FRP Core Tube has excellent circularity and straightness, which can ensure smooth and uniform winding of thin foil materials without wrinkles or gaps.
Antistatic. FRP Core Tube has antistatic properties, which can prevent static electricity buildup and discharge that can damage the thin foil materials or cause fire hazards.
Semi-Permanence. FRP Core Tube materials has semi-permanence properties, which means it can be reused for multiple times without losing its performance or quality. This can reduce the waste and cost of core materials.




What are the specifications and uses of FRP Core Tube?

FRP Core Tube has different specifications and uses depending on the application and customer requirements. Some of the common specifications and uses are:
·For secondary battery copper foil winder (cathode). The specification is 6㎛, 8㎛, 10㎛, or 20㎛ thickness. The use is to wind the copper foil that serves as the cathode (negative electrode) of the secondary battery.
·For secondary battery aluminium foil winder (anode). The specification is 10㎛, 12㎛, or 15㎛ thickness. The use is to wind the aluminium foil that serves as the anode (positive electrode) of the secondary battery.
·For separator winder (separation membrane). The specification is any thickness. The use is to wind the separator that serves as the separation membrane between the cathode and anode of the secondary battery.
·For electrode winder. The specification is any thickness. The use is to wind the electrode that serves as the active material of the secondary battery.

Target Industries & Winding Applications

Due to their exceptional durability and high reusable lifecycle, Zhongsheng fiberglass core tubes are widely adopted across high-end processing industries:

• Electronic Copper Foil Manufacturing: Specialized winding for ultra-thin electrolytic copper foil used in multilayer PCBs.
• Lithium Battery Supply Chain: Heavy-duty core rollers for battery anode/cathode foils and separator films.
• High-Precision Film Conversions: Optical films, solar panel protective films, and metalized packaging foils.
• Alloys & Aluminum Foils: Reusable winding shafts for thin-gauge metal foils requiring high linear tension control.

Advanced Manufacturing and Reusable Lifecycle

Each individual winding tube undergoes rigorous balancing, straightness verification, and hardness testing in our modern production facility. Because Zhongsheng composite tubes do not splinter, crack, or deform over time, they serve as excellent reusable cores, drastically lowering your company's long-term operational costs and supply-chain waste compared to disposable cardboard or fragile plastic alternatives.