Polyurethane rigid foam is a new type of foam formed by using polyether or polyester and polyisocyanate as main raw materials, adding flame retardant, stabilizer and foaming agent, and mixing and stirring to produce chemical reaction. Low temperature insulation material. The cavity has a high closed cell ratio and low water absorption.
Because the pores are low thermal conductivity foaming agent gas, there is a certain self-extinguishing property, which is commonly used for heat preservation in the cold and low temperature range. It has the advantages of small thermal conductivity, high strength, light weight, sound insulation, shock resistance, insulation, strong floating property, stable chemical properties and convenient construction. It is widely used in petroleum, chemical, ethylene, cold storage, food storage and household appliances refrigerators. Used in industries such as partition walls and siding in the construction industry. When applied, it can be prefabricated by the prefabricated factory into products such as plates or shells, or it can be sprayed or infused on site.
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