- Nov 21, 2018 -
Polyurethane is a two-component AB
The material (isocyanate and combined polyether) is mixed and foamed, which is currently
The thermal conductivity of the insulation material is at least 0.017~0.024
(The lower the thermal conductivity, the better the insulation effect). The polyurethane filling and filling process of the polyurethane sandwich panel is prefabricated and the thermal insulation board is directly installed and used at the site. If your plant area is relatively large, it is recommended that you use only color steel veneer as a whole, and then use the on-site polyurethane spray foaming process. The advantage of this process over the infusion process is that the spray is seamless and the insulation effect is better. The cost is lower than the infusion process.
The polyurethane material in thesandwich panel is a high molecular polymer which is foamed by a foaming agent, a catalyst, a flame retardant and the like by using an isocyanate and a polyether as main raw materials. Polyurethane rigid foam is a new type of synthetic material with thermal insulation and waterproof function. Its thermal conductivity is low, only 0.022~0.024W/(m·Κ), which is equivalent to half of extruded board. It is the thermal conductivity of all insulation materials. lowest.
There are two kinds of processes for cold storage polyurethane insulation. One is to use the sandwich panel for on-site splicing, and the other is to use the polyurethane sprayer for on-site spray foaming.
Compared with the first process, the second process is due to on-site spray foaming. Any joints greatly avoid the phenomenon of joints between the cold and hot bridges, and the insulation effect is better than the first one.