Полиуретан Смешанный компонентов

Polyurethane insulation is one of the main raw material composition polyether polyurethane foam. Combination of polyether polyurethane foam, also known as white material, and polymeric MDI, said a total of black and white material. Apply to building insulation, cold insulation, solar, water heater, refrigerator, temperature storage, beer cans, refrigeration and other needs of the cold temperature for a variety of occasions. Respect for the insulation material is usually combined polyether polyols, foam stabilizers, catalysts, blowing agents, flame retardants and other groups were formed, according to the different blowing agents can be divided into fluorine-based, fluorine-free 141b type All fluorine-free water-in several major types. Polyether combination of materials is usually light yellow or brownish red viscous transparent liquid, no coagulum and thin and thick material evenly, without mechanical impurities. Casting process parameters reference manual spray-type mechanical reperfusion type cream time s ≥ 20 7 14 2 4 Gel time s 70 120 30 50 8 12 Curing time min ≤ 5 ≤ 5 ≤ 5 overall density kg/m3 35 50 35 50 32 50 Note: According to different conditions and requirements of the above site adjustable parameters. Reference performance index compression strength (10%): ≥ 140kpa Water absorption: ≤ 3% shape stability (70 °C, 48h): ΔV ≤ 2% Thermal conductivity: ≤ 0.023w/mk