Everyone knows about polyurethane foaming machines. Because of its excellent characteristics, polyurethane foamed plastics are essential materials in transportation, furniture, refrigeration, heat insulation, construction and other sectors, and are widely used and are favored by most industries.
What are the manufacturing methods and technologies of the polyurethane foaming machine?
1. The prepolymer foaming technology of the polyurethane foaming machine mainly includes the preparation of prepolymers with black and white raw materials, adding some surfactants, catalysts, water and other food additives to the prepolymers, and rapid development of mixed foaming. Mature at a certain temperature.
2. Semi-prepolymer foaming is to make a part of diisocyanate and polyether polyol into prepolymer first, and then add another part of polyester polyol or polyether and catalyst, water, diisocyanate, surfactant, Add other additives, etc., quickly stir to mix and foam.
3. One-step foaming technology process polyisocyanate polyether or polyester polyol, surface active agent, catalyst, water, foaming agent and other additives can be added to quickly develop mixed use of foaming. The one-step foaming method is widely used, but there is also the simplest manual foaming method. The polyurethane foaming machine weighs all materials, puts them into the container, and then mixes them evenly into the foam-filled space or mold immediately.
4. Polyisocyanate and polyether or polyester for polyol, surface active agent, water, foaming agent, catalyst, other food additives and other raw materials can be foamed together quickly under stirring.