Product Structure of PU Sandwich Duct Panel
The Sandwich Duct Panel adopts an integrated sandwich structure. The two outer layers are usually made of high-strength materials, commonly aluminum foil or metal panels. Aluminum foil not only has good moisture resistance and corrosion resistance, but also can effectively reflect heat and reduce heat transfer; metal panels provide higher mechanical strength, enhancing the durability and impact resistance of the duct. The middle core layer is the key to the insulation of the entire duct, which is generally made of high-density insulating materials, such as polyisocyanurate (PIR) foam, polyurethane (PU) foam or phenolic foam. These foam materials have extremely low thermal conductivity, which can efficiently prevent heat transfer between the inside and outside of the duct and ensure the stability of the air temperature inside the duct.
Advantages of PU Sandwich Duct Panel include:
Excellent thermal insulation performance, reducing heat loss and improving system efficiency.
Lightweight design, facilitating quick assembly and lowering labor costs.
Improved indoor air quality, thanks to the sealed structure that minimizes leakage to the greatest extent (air loss rate ≤ 1.2%).
Durable and moisture-resistant, with a water absorption rate ≤ 3.7%.
Typical technical specifications include:
Thickness options: 20mm, 25mm or 30mm.
Panel dimensions: Standard sizes such as 2000x1200mm, 3950x1200mm and 4000x1200mm.
Performance indicators: Flexural strength 2 MPa, oxygen index ≥ 45 (fire safety), thermal resistance 0.99 m²K/W.
How to make Sandwich Duct Panel
the fabrication Process of Pre-insulated Duct
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