High-thermal-conductivity heat-dissipating PA

Replacing Aluminum with Plastic: Advantages and Applications of Highly Thermally Conductive Nylon (Thermally Conductive PA)
Highly thermally conductive PA—based on PA6 or PA66 and reinforced with thermally conductive fillers such as aluminum oxide, boron nitride, or graphite—is designed to replace aluminum. It serves as a plastic alternative to die-cast or machined aluminum heat sinks and structural components, offering a combination of thermal management, electrical insulation, weight reduction, and cost-effective mass production.
Key Advantages of Replacing Aluminum with Plastic
Weight Reduction
With a density of 1.4–1.7 g/cm³—approximately 40% lower than the 2.7 g/cm³ density of aluminum alloys—this material reduces the overall weight of a product and lowers energy consumption. These benefits are particularly significant for new energy vehicles and automotive components.
Inherent Electrical Insulation (A Major Advantage)
Highly thermally conductive, yet electrically insulating, this nylon features a volume resistivity greater than 10¹⁴ Ω. Unlike aluminum—a conductor that requires additional insulating gaskets or coatings—thermally conductive PA eliminates the need for such components. This simplifies product architecture and mitigates the risks of electrical leakage or short circuits in high-voltage devices.
Integrated Injection Molding for Cost Efficiency and Productivity
Aluminum components typically require die-casting, deburring, CNC machining, and anodizing—a multi-step process with long lead times.
In contrast, highly thermally conductive nylon can be formed via direct injection molding. Complex cooling fins and intricate, non-standard geometries can be produced in a single step without the need for secondary machining. This shortens production cycles, minimizes waste, and offers a lower per-unit cost for large-scale manufacturing compared to aluminum.
Corrosion Resistance and Chemical Durability
Unlike aluminum, which can oxidize (turning white) or corrode when exposed to coolants, acids, or bases, this material is resistant to oils, antifreeze, and weak acids or alkalis. It is well-suited for use in automotive engine compartments or humid outdoor environments, eliminating the need for additional anti-corrosion surface treatments. High Design Flexibility and Functional Integration
Features such as cooling fins, mounting clips, positioning pins, and sealing grooves can be integrated into a single component. This combines structural and thermal management functions, reducing the total number of parts and the need for screw-based assembly, which in turn lowers the rate of assembly defects.
Low Electromagnetic Interference (EMI) and Superior Radiative Cooling
As a non-metallic material, it eliminates eddy current losses. Formulations with high emissivity offer better infrared radiative cooling performance than bare aluminum, excelling in natural convection environments. Materials can be customized to meet stringent electronic safety standards, including UL94 V0 flame retardancy and high Glow Wire Flammability Index (GWFI) ratings.
Weight Reduction and Added Benefits
Contributes to overall vehicle weight reduction and lowers transportation costs. In end-use applications subject to vibration, the reduced mass results in lower inertia and enhanced vibration resistance.
Applications: On-Board Chargers (OBC), electronic control units, and battery modules for New Energy Vehicles (NEVs); LED heat sinks; 5G communication modules; Power Conversion Systems (PCS) for energy storage; power adapters; and IGBT heat sinks.