Politubes manufactures a wide range of insulating tubes for batteries (cells and battery packs) used in electric motors across the automotive, energy, military, and aerospace sectors.

Our tubes are produced using spiral-winding technology, which eliminates film overlap in the closing area and ensures key advantages:

• space optimization and improved packing factor;
• enhanced safety within battery packs;
• reduced risk of heat peaks that typically occur in film overlap zones.

We only use high-quality raw materials supplied by world-leading manufacturers of electrical insulation.

Key benefits of our insulating tubes:

• Electrical insulation and prevention of short circuits;
• Thermal management and reduction of overheating;
• Prevention of thermal runaway in lithium-ion cells, improving safety and performance;
• Flame resistance and flame retardancy to limit fire propagation.

Our tubes are custom-designed and manufactured primarily using heat-shrinkable polyester (Mylar®, Hostaphan® 2MSO, 2LSO), Nomex® 818–864, Nomex/Mylar® combinations, Kapton® (polyimide), DyBond®, or other technical films carefully selected according to the customer’s specific requirements.

Mylar®, Nomex®, and Kapton® are registered trademarks of DuPont – DyBond® is a registered trademark of Coveme – Hostaphan® is a registered trademark of Mitsubishi.