Some cold storages leak cold after being used for a period of time, resulting in an increase in the electricity bill of the refrigeration machine. What is the reason?
There are two factors to consider for cold storage insulation, which are heat exchange and moisture exchange. If the dimensional stability of the sprayed blend polyether polyols polyurethane rigid foam used is not good and the construction process is incorrect, the sprayed PU rigid foam will crack after the cold storage is put into use, forming a cold bridge and leaking cold. If the closed-cell rate of the sprayed polyurethane rigid foam is too low, the foam will open and absorb moisture. After the foam absorbs moisture, the thermal conductivity will increase rapidly, and the cold insulation effect will be greatly reduced.
Therefore, to fundamentally avoid the problem of cold leakage, it is necessary to choose qualified polyurethane rigid foam products. Therefore, it is particularly important to choose suitable blend polyether polyols.
Our blend polyether polyols for rigid polyurethane foam will help to avoid the problem of cold storage leakage very well. The blend polyether polyol is the raw material for cold storage spraying. It has good adhesion, high adhesion, good fluidity, strong pressure resistance, good dimensional stability, and is widely used in the refrigeration industry.