Hongyu Bus PU Long Air Duct — Material Features
Hongyu Bus PU Long Air Duct uses high‑quality polyurethane (PU) as the core material, manufactured with mature foaming technology. It is a flexible air duct solution specially designed for bus ventilation systems.
The material combines multiple advantages: flexibility, crack resistance, environmental protection, durability and easy processing. It meets the long‑distance ventilation needs of various buses, with comprehensive performance far exceeding traditional PVC and plastic air ducts, making it the preferred matching component for new energy buses and passenger vehicles.
Excellent Flexibility & Weather Resistance for Harsh Conditions
With a special molecular structure, PU material offers outstanding softness and bending resistance. It remains flexible and does not crack even at -20°C in cold environments, and can also withstand high‑temperature exposure, adapting to extreme temperature changes inside the passenger compartment.
Compared with traditional materials, it has better vibration and impact resistance, and can withstand bumps during driving. It does not easily break or leak air even after long‑term use, making it suitable for complex scenarios such as long‑distance passenger transport and operation in cold northern regions.
Eco‑Friendly & Anti‑Aging with Great Protection
The material adopts a low‑VOC eco‑friendly formula that meets green standards for bus interiors, with no harmful emissions or odors, ensuring healthy air quality inside the vehicle.
It is naturally moisture‑proof, mildew‑proof and salt‑fog corrosion resistant without additional protective coatings. It resists damage from humid environments inside the compartment and adapts to high‑salt‑fog coastal areas, fundamentally solving the problems of aging, brittleness, mildew and damage of traditional air ducts.
Lightweight & Easy to Install with Low Maintenance Cost
PU material is low in density and light in weight, making it easier to handle and install than metal air ducts, greatly reducing assembly time and labor costs. It can be flexibly laid to fit complex compartment layouts.
The material can be sawed, planed and bent, producing almost no waste during installation. Local damage can be quickly cut and replaced without removing the entire duct, significantly reducing later maintenance costs and vehicle downtime.
Strong Surface Adaptability Combining Practicality & Appearance
PU material has excellent colorability and can be treated by spraying, film coating and other processes. It supports customized colors and textures to match the overall interior, and can also achieve wood‑grain or metal‑like effects.
Its smooth surface is easy to clean and not prone to dust or dirt. It not only satisfies ventilation requirements but also improves the unity and refinement of the passenger compartment interior.
