Light, safe,decrease the load of the building.
Easy to install, shorten the construction period.
Protect environment, sandwich structure with antioxidant surfaces.
High performance in heat insulating, can be served in both high and low temperature environment.
Fireproof, meet the National Standard, makes building safe.
Soundproof, makes a quieter environment.
No need to leave space for insulation material installing, so that the story height can be reduced.
Long service life up to 20 years, very low cost in wastage and maintenance.
Haohai polyurethane pre-Insulated duct is a kind of sandwich structure duct that is made of fireproof polyurethane foam and aluminum foil composited by continuous pressure process. It has high performance in heat insulation. The polyurethane in the duct is a kind of closed cell foam with a low thermal conductivity. This makes Haohai ducts have a high performance in heat Insulation to save energy.
Haohai polyurethane pre-insulated duct has a much longer service life than other materials. It has a 20 year service life while traditional Zincification duct has only no more than 10 years. Besides, Haohai duct is very light so that can be easily moved and installed. It has a lower requirement of load capacity for the building.
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In PU foam (OCF) industry, Haohai is one of the leading PU foam manufacturers in China.