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What is PU ductwork and its advantages?
Polyurethane (PU) is the abbreviation of polyurethane, which is formed by addition polymerization of polyisocyanate and polyhydroxy polymer, and contains many repeating urethane segments (-NHCOO-) in the main polymer chain. polymer compounds. In 1937, German Otto Bayer prepared polyurethane materials by reacting isocyanates with polyols. After that, polyurethane materials attracted the attention of the world with its excellent performance and developed rapidly. From 1941 to 1942, Germany began the industrial production of polyurethane, and developed products such as elastomers, foams, coatings, and adhesives. Soon after, companies such as BASF in Germany, Du Pont in the United States, and polyurethane in Japan also began to develop and produce polyurethane.
The rapid development of polyurethane benefits from the excellent properties of materials, such as wear resistance, high mechanical strength, high elasticity, aging resistance, corrosion resistance and so on. These excellent properties are closely related to the molecular structure of polyurethane materials: the main chain of polyurethane molecules is composed of flexible long-chain polyols and rigid isocyanate blocks, which can effectively disperse stress, and the coexistence of polar and non-polar segments is also The chemical stability of polyurethane is improved, and the extensive hydrogen bonding in the polymer further improves the mechanical properties of the material. In addition, the -NCO group of isocyanate is very active, and can react quickly with alcohol, water, organic amine, etc., and the processing performance of the material is good. Through the control of reaction conditions and catalysts, a variety of polyurethane products with different hardness and different structures can be obtained, such as elastomers similar to rubber or plastic, sponges with open-cell structures, rigid foams with closed-cell structures, adhesives, coatings, sealants, etc. Agents, etc., are widely used in various fields of national production and life.
Composite polyurethane air duct is made of polyurethane as raw material, and metal panels with a certain thickness are laminated on both sides. It is made of one-time foaming composite by advanced continuous production line. The resulting air duct system has low air friction resistance, low thermal conductivity, high bending strength, and excellent thermal insulation performance, thereby reducing the loss of cooling capacity, and the temperature and humidity of the air transported in the duct can effectively maintain the original level. The inner and outer metal panels form a stable and dense protective layer, which can be used for more than 30 years.
Composite polyurethane foam insulation air duct product features:
■ The material of the product is light, which can reduce the load of the building. The manufacturing process is simple and reasonable, and the airtightness is good, which reduces the air leakage of the air duct system, so as to achieve the purpose of energy saving.
■ Clean and environmentally friendly, because the appearance of this product is made of metal panels, there is no dust or fiber in the air duct, which ensures clean and environmentally friendly air supply.
■ Automatic continuous flow operation, high production efficiency.
■ Low thermal conductivity and good thermal insulation performance, so it has good sound insulation and thermal insulation performance.
Parameters of polyurethane composite air duct
1. Fire rating (GB8624—1997): flame retardant B1
2. Capacity 49-69kg/m3
3.Thermal conductivity: at room temperature 24, the thermal conductivity of the product is less than 0.021V/M·K
4. Heat resistance -50~80
5. Compression strength 10%: 0.2Mpa
PU pre-insulated duct cutting machine is a cnc machine that is used to cut and fabricate PU pre-insulated ductworks. PU pre-insulated duct cutting machine has many good features like fast and accurate cutting, easy to use ect. PU pre-insulated duct cutting machine is definitely a good choice for duct factories who want to improve their pre-insulated ductwork efficiency. If you want to buy a PU pre-insulated duct cutting machine, please visit our website and send us inquiry.
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