The main function of a small refrigerated truck is to achieve refrigeration, freezing, and insulation. To achieve this, in addition to the choice of refrigeration unit, the key is the insulation layer of the compartment. So, what are the requirements for the insulation layer material of a small refrigerated truck to achieve refrigeration and insulation.

(1) Uniform foaming and low density;

(2) The thermal conductivity should be kept as low as possible, generally requiring less than 0.045 W/(m? K);

(3) Good stability to temperature changes and performance requirements for use;

(4) Having some mechanical strength, able to withstand the vibration and impact of automobiles under harsh road conditions without damage or deformation;

(5) Low water absorption and moisture absorption, good frost resistance;

(6) It is non-toxic and odorless, with low ventilation. When the insulation material burns, it must not decompose into toxic and harmful gases;

(7) Low price, easy to shape, and can be formed into a car insulation layer using filling, pouring, spraying and other processes.