Brief description of functions:
As a thermal insulation material, the thermal conductivity is a key indicator to measure the thermal insulation performance of the material. As we all know, the thermal conductivity of solid materials varies with the structure, density, and porosity of the material. Similarly, the thermal conductivity of rigid polyurethane foam varies with the structure, density, pore size, and pore size distribution of the foam. Therefore, studying the relationship between the change of the formula and the thermal conductivity and thermal insulation performance during the polyurethane molding process and how to obtain the thermal conductivity accurately and quickly is extremely important for the development and application of rigid polyurethane foam. The quality control of refrigerator manufacturers, as well as the calculation and cost control of the foaming thickness of refrigerator insulation materials are very important.
According to the standard:
GB/T 26689-2011 Rigid polyurethane foam for refrigerators and freezers;
GB/T 10294-2008 Determination of steady-state thermal resistance and related characteristics of thermal insulation materials Protective hot plate method;
GB/T 10295-2008 Determination of steady-state thermal resistance and related characteristics of thermal insulation materials by calorimeter method;