ID 3 inches OD 6 inches Double-layer ABS spool

Focusing on high precision, high performance, and high stability, Hongkai Plastic manufacturer provide one-stop solutions for global new energy enterprises. Utilizing glass-fiber reinforced ABS modified material and proprietary low-shrinkage, high-heat-resistance formulations, our ID 3 inches OD 6 inches Double-layer ABS spool maintain dimensional accuracy (shrinkage rate ≤0.3%) under extreme conditions. Achieving industry-leading roundness and straightness, they eliminate common issues like wave-like winding and sagging edges in separators, helping customers boost battery yield rates by over 5%.

ID 3 inches OD 6 inches Double-layer ABS spool,  as a core component in lithium battery production, the separator spool shaft's primary function is to provide stable, precise winding support for the separator, ensuring effective isolation between the battery's positive and negative electrodes while maintaining structural integrity. In material selection, the industry widely adopts glass-fiber reinforced ABS. Through glass fiber modification, the performance of base ABS achieves a qualitative leap: its melting point is significantly higher than standard ABS, enabling it to withstand high-temperature processes in lithium battery production (such as separator heat treatment and drying) without deformation-induced winding irregularities. Its low shrinkage rate (controlled below 0.3%) ensures dimensional stability of the core shaft under temperature fluctuations, effectively reducing defects like separator waviness and edge sagging; The incorporation of glass fiber boosts impact resistance by 30%-50%. Combined with high rigidity (bending modulus of 5-8 GPa), it withstands mechanical stress during high-speed winding while maintaining straightness over extended use, ensuring optimal flatness in separator winding. Furthermore, its chemical stability against electrolyte and acid/alkali corrosion, along with a low-floating-fiber design (minimizing fiber shedding risk), fundamentally eliminates contamination hazards and micro-particle puncture risks to the separator, establishing a robust defense for battery safety.

Technologically, the manufacturing process of the core shaft centers on precision: parameters like diameter and length are customizable to client specifications (covering 3-10 inch ranges). Utilizing CNC machining and vacuum sizing technology ensures the core shaft fits the separator width perfectly, minimizing edge waste to near zero. Surface finish achieves Ra ≤ 0.8μm, significantly reducing friction resistance and preventing static electricity generation or separator scratches during winding. Dynamic balancing tests (G1.0 precision grade) ensure near-zero vibration during high-speed rotation, delivering uniform winding tension. This fundamentally prevents short-circuit risks caused by separator displacement during battery charging/discharging. Furthermore, the density of glass-fiber-reinforced ABS (approximately 1.2–1.5 g/cm³) is significantly lower than that of metal materials. This achieves lightweighting while maintaining high strength through optimized glass fiber distribution, perfectly meeting the dual demands of efficiency and energy consumption in automated production lines.

In application scenarios, core shafts have deeply penetrated all categories of lithium battery production: - In power batteries, they support the winding of separators for prismatic and cylindrical cells, enabling stable operation of high-energy-density systems (e.g., NCM811, LFP) under high-voltage and high-temperature conditions. After adopting this material, a leading manufacturer achieved a 99.5% separator winding pass rate and extended battery cycle life by 10%. In consumer electronics, ID 3 inches OD 6 inches Double-layer ABS spool meet precision winding demands for slim designs in smartphones and laptops. For large-scale energy storage systems, their fatigue resistance serves as a “stabilizing force” during long-cycle, high-load operations, significantly reducing maintenance costs. The development of recyclable ABS materials further underscores the industry's commitment to environmental protection and sustainable development. From performance to efficiency, safety to eco-friendliness, lithium battery separator core shafts are undergoing comprehensive evolution, empowering the boundless possibilities of the new energy era.