Thanks to its excellent products and quality services, UNT Duct is one of the leading polyurethane composite ducting manufacturers and suppliers in China. Welcome to buy the high quality and customized products from our factory. We will offer you the best service and fast delivery.
Polyurethane Composite Ducting
Polyurethane Composite Ducting, alternatively designated PU aluminum foil duct panel and PU sandwich duct panel, is a high-spec composite material intended for HVAC (Heating, Ventilation and Air Conditioning) air duct applications.
The product adopts a trilaminar laminated structure composed of:
Dual outer facings: High-tensile aluminum foil, supplied in plain or embossed variants
Internal core substrate: Rigid polyurethane (PU) foam, functioning as structural backing and thermal insulating medium
Service Life, Environmental Protection and Hygiene of Polyurethane Composite Ducting
Durability Performance Indicators
Benefiting from the stable cyclic macromolecular structure of PIR foam, its thermal conductivity variation is controlled within a maximum increase of 5% across 25 years, with a rated service life of 20–25 years. By contrast, galvanized steel ducts develop corrosion and air leakage after 5–8 years, and rock wool will pulverise and lose its insulating function within 5 years. The overall life-cycle replacement cost can be lowered by 70%.
Environmental Test Outcomes
No harmful substances such as formaldehyde or benzene are released, and asbestos is absent from the formulation. The material loss rate during foaming production stands at only 3%, and residual scraps are recyclable for secondary manufacturing. The product meets requirements to gain bonus credits for LEED certification and China Three-Star Green Building Evaluation.
Cleanliness Characteristics
The smooth antibacterial aluminium foil cladding on both sides reduces internal air flow resistance by 12% and inhibits dust accumulation and mould growth. It is applicable to purified ventilation systems for food factories and surgical operating rooms. Extra antibacterial inner lining coating is unnecessary, resulting in zero additional consumable costs for clean system construction.
How to make Straight Ducts with Polyurethane Composite Ducting
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Tools: Pre-insulated Duct Cutting Tools Kit, including V cutter.
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Method: Boards are scored, folded, and assembled into rectangular; joints sealed with pressure-sensitive aluminum foil tape or water-based acrylic adhesive.
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Support: While rigid enough for low-to-medium static pressure (typically ≤ 1500 Pa, or 6″ w.g.), ducts require proper hanging supports per manufacturer guidelines.
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