What is GENESTAR PA9T?

GENESTAR PA9T is a high-performance polyamide resin developed by Kuraray. It combines high heat resistance, low moisture absorption, excellent chemical resistance, and strong electrical insulation properties, making it suitable for demanding applications in EV battery systems.

Where is Kuraray presenting GENESTAR PA9T in 2026?

Kuraray will present GENESTAR PA9T at The Battery Show Europe 2026, taking place June 9 to 11 in Stuttgart, Germany, at Hall 3, Booth C76.

How does GENESTAR PA9T perform in high-voltage EV battery applications?

Kuraray positions GENESTAR PA9T for battery architectures operating at 800 to 1000 volts. The company states the material offers outstanding electrical insulation properties and a Comparative Tracking Index that far exceeds conventional polymer values, enabling compact and lightweight high-voltage components.

What is the risk of coolant leaching in EV battery systems?

If ions or oligomers leach from battery cooling components into the coolant, they can contaminate the cooling circuit and compromise the battery's electrical performance. Kuraray states that GENESTAR PA9T produces minimal leaching effects from coolants, increasing system cleanliness and overall battery reliability.

What is the Comparative Tracking Index and why does it matter for 800V battery architectures?

The Comparative Tracking Index, or CTI, measures a material's resistance to surface electrical discharge between conductors. In 800V to 1000V battery architectures, high CTI values are critical for preventing leakage currents across insulating components. Kuraray states that GENESTAR PA9T has a CTI that far exceeds conventional polymer benchmarks, enabling smaller, lighter high-voltage components without compromising safety.

How does hydrolysis resistance affect long-term EV battery cooling system reliability?

Hydrolysis occurs when water reacts with polymer chains at elevated temperatures, degrading mechanical properties over time. In EV battery cooling circuits, where components are exposed to hot coolant fluids over years of service, hydrolysis resistance is a key durability factor. Kuraray states that GENESTAR PA9T demonstrates excellent hydrolysis resistance even at high temperatures, supporting long service life in battery cooling applications.

How does GENESTAR PA9T compare to standard polyamides for EV battery thermal management?

Kuraray states that conventional polymers tend to lose mechanical stability under the extreme thermal conditions found at EV battery hotspots, particularly during fast charging. GENESTAR PA9T is a polyphthalamide, or PPA, in the PA9T family. Kuraray says it maintains stable mechanical properties over a wide temperature range and has repeatedly proven its suitability as a thermal management component, making it more appropriate than standard polyamides for next-generation high-density battery designs.

Kuraray to showcase GENESTAR™ PA9T for EV battery thermal management at The Battery Show Europe 2026

Q: What EV battery challenges does GENESTAR PA9T address?

Kuraray says GENESTAR PA9T is designed to address six key challenges in EV battery engineering: overheating under fast-charging conditions, aggressive coolant resistance, high-voltage safety in 800V to 1000V architectures, dimensional stability, cooling system contamination from leaching, and manufacturability of complex components at scale.

Q: Why does moisture absorption matter in EV battery materials?

High moisture absorption in polymer components can cause dimensional changes that affect part fit, tolerance, and long-term reliability. Kuraray states that moisture absorption in GENESTAR PA9T is among the lowest of any high-temperature-resistant polyamide, giving it stable dimensional performance in hot and humid operating environments.

Q: Can GENESTAR PA9T be used in high-volume EV battery production?

Yes. Kuraray states that GENESTAR PA9T processes well through both injection molding and extrusion, and exhibits good laser weldability. The company says this supports high-volume production of complex, highly integrated components with thin walls and intricate geometries.

Category: Batteries, Connectors & Cables, Insulation, Materials, Thermal Management

May 27, 2026

Kuraray GENESTAR PA9T polyamide components for EV battery thermal management, high-voltage insulation, and coolant resistance alongside a cutaway EV battery pack

Kuraray’s GENESTAR™ PA9T is engineered for the thermal management, high-voltage safety, and long-term reliability demands of next-generation EV battery systems

(Image courtesy of Kuraray)

Kuraray will present its GENESTAR™ PA9T high-performance polyamide family at The Battery Show Europe in Stuttgart from June 9–11, 2026. The global specialty chemicals company, headquartered in Japan, says the material is designed to address six key challenge areas in modern EV battery engineering: overheating under fast-charging conditions, aggressive coolant resistance, high-voltage safety in 800V to 1000V architectures, dimensional stability, cooling system cleanliness, and manufacturability at scale. For battery developers working on next-generation pack designs, the company says GENESTAR™ PA9T addresses real engineering constraints across the full system.

GENESTAR™ PA9T is designed to support EV battery thermal management and coolant resistance

Kuraray says GENESTAR™ PA9T retains its mechanical stability over a wide temperature range, making it suitable for hotspot-adjacent components where standard polymers lose structural integrity under fast-charging thermal loads. Beyond heat, the company states the material offers high chemical resistance to aggressive cooling fluids and excellent hydrolysis resistance even at elevated temperatures, supporting long-term reliability in battery cooling circuits. Kuraray also states that the material produces minimal leaching effects from coolants, which it says increases system cleanliness and enhances the reliability of the cooling circuit and the wider EV battery.

High-voltage battery architecture demands drive GENESTAR™ PA9T development

Kuraray positions GENESTAR™ PA9T for battery architectures operating at 800 to 1000 volts, where the company says the material offers outstanding electrical insulation properties. Its Comparative Tracking Index far exceeds conventional values, Kuraray says, enabling the production of compact and lightweight high-voltage components. The company identifies preventing leakage currents as a critical safety factor in these designs and says the material’s tracking resistance performance directly addresses that requirement.

Dimensional stability is a further claimed advantage. Kuraray states that moisture absorption in GENESTAR™ PA9T is among the lowest of any high-temperature-resistant polyamide, resulting in predictable part geometry under hot and humid operating conditions.

Processability supports high-volume EV battery component production

Kuraray says the material processes well through both injection molding and extrusion, and also exhibits good laser weldability. The company says this supports the assembly of complex, highly integrated components with thin walls and intricate geometries at production scale. As gigafactory output ramps and component integration requirements grow, processability is increasingly a factor in materials selection for EV battery programmes.

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