ID 3 inches OD 10 inches Double-layer ABS Spool

Certified by SGS and RoHS environmental standards, Hongkai Plastic’s China ID 3 inches OD 10 inches Double-layer ABS spool enhances battery internal resistance consistency and extends cycle life. It is already in mass production for power batteries and energy storage applications, becoming the trusted choice for the world's top 10 battery manufacturers.

The inner-three-outer-ten ABS core reel features an ingeniously designed structure, precisely matching a 3-inch (approx. 76.2mm) inner diameter with a 10-inch (approx. 254mm) outer diameter. The inner diameter serves as the winding support structure, with dimensional tolerance strictly controlled within ±0.05mm. This precision ensures uniform tension during power lithium battery separator winding, effectively preventing wrinkles or fractures. The expanded outer diameter significantly enhances load capacity—particularly in energy storage applications, where each 1-inch increase in outer diameter boosts single-roll separator length by approximately 15%. Wall thickness has also been optimized at 5-7mm, representing a 1mm reduction from conventional designs.

Finite element analysis confirms that under ultra-high-speed winding conditions of 2.5m/s, dynamic deformation remains below 0.03mm—a 40% reduction compared to standard designs—effectively maintaining consistent battery internal resistance. Furthermore, addressing the shrinkage characteristics of ABS material, the mold dimensional pre-compensation has been optimized to 0.6%, an increase of 0.1% over conventional values. This adjustment effectively counteracts material shrinkage stress, ensuring dimensional accuracy of the product.

Regarding material properties and process, the inner-three-outer-ten ABS winding core shaft utilizes a 15% glass-fiber reinforced ABS substrate. This material exhibits broad temperature resistance from -40°C to 120°C, perfectly matching polymer battery high-temperature curing processes such as the 90°C environment in hot pressing operations.

Additionally, its ultra-low shrinkage rate of 0.25% achieves 10-year dimensional stability, doubling the lifespan compared to standard ABS. For surface treatment, the core shaft's surface roughness is optimized to Ra ≤ 0.3μm—a 60% improvement over industry standards. This refinement significantly reduces the separator friction coefficient below 0.1 and cuts static electricity generation by 50%, preventing impurity adhesion and surface scratches at the source.

In the modified formulation, adding 0.5% nano-sized hindered amine light stabilizer (HALS) achieves a color difference ΔE<1.5 after 500 hours of UV accelerated aging testing, enhancing yellowing resistance by 40% compared to conventional formulations. The adoption of bromine-antimony synergistic flame retardancy technology (decametribromodiphenyl ethane + antimony trioxide blend) achieved UL94 V-0 flame retardancy standards, with the glow-wire ignition temperature elevated to 850°C, meeting the safety requirements for new energy vehicle battery packs. Addition of 5% nano-grade PTFE enables the material to maintain 95% strength retention after 72 hours immersion in 60°C electrolyte, representing a 25% improvement over standard formulations.

In manufacturing, the ID 3 inches OD 10 inches Double-layer ABS spool employs a five-zone intelligent temperature control system for extrusion molding. Temperatures in the feeding, plasticizing, homogenizing, metering, and die sections are precisely regulated at 145-160°C, 160-175°C, 170-185°C, 175-180°C, and 180-185°C, respectively. Combined with a 3.5:1 high-compression ratio barrier screw and dual vacuum degassing system, this process controls material moisture content below 0.02% and reduces bubble defect rates to the 0.1 ppm level.

For mold shaping, a helical diverter shuttle structure and a 180-195°C gradient heating system, combined with 25°C constant-temperature water bath cooling, achieve oriented molecular chain alignment, enhancing product impact resistance; For quality inspection, an online laser diameter measurement system (±0.01mm accuracy) and dynamic stress analyzer (10s deformation <0.08mm under 50N load) ensure 100% inspection coverage, guaranteeing a CPK value ≥1.67. In application performance, the 3-inner-10-outer ABS core shaft excels: its 3-inch high-precision inner diameter design reduces square aluminum-cased battery resistance fluctuation to within ±12%, with each 0.05mm precision improvement boosting consistency by 2.5%. Ultra-smooth surface treatment elevates capacity retention to 92% after 1000 cycles—a 6% increase over conventional designs.

In energy storage applications, the modified ABS formulation maintains 95% strength retention after 72 hours immersion in 60°C electrolyte, meeting long-term service requirements. Concurrently, microcellular foaming technology reduces density to 0.75 g/cm³, achieving 28% weight reduction compared to solid structures. While maintaining ≥120 MPa flexural strength, this innovation lowers per-unit shipping costs by 18%.