The heat-insulating material on the one hand satisfies the thermal environment of the building space or thermal equipment and on the other hand also saves energy. Therefore, some countries regard insulating materials as the “fifth largest energy source” after coal, oil, natural gas, and nuclear power.

First, how to distinguish the thermal insulation material performance advantages and disadvantages:

1. The heat insulation performance is mainly reflected by the thermal conductivity.

2, thermal conductivity λ = W / (mk).

3. The thermal conductivity characterizes the thermal conductivity of the material under stable heat transfer conditions. The smaller the value of the thermal conductivity, the better.

4. The λ value of 0.20w/(mk) is used as the boundary value between insulation material and non-insulation material. Materials with λ>0.20w/(mk) should not generally be used as insulation materials.

Second, the selection of insulation insulation material points:

The common application types and design selection of thermal insulation materials in buildings shall comply with the provisions of GB/T 17369-1998 "Application Types and Basic Requirements for Thermal Insulation Materials for Buildings".

In addition to considering the thermal conductivity of the material (the thermal conductivity is less than 0.175W/(mK)), the water absorption, combustion performance, and strength of the material should also be considered. The performance characteristics of different insulation materials can be found in the corresponding classification guidelines.

The main representative products: Naki heat insulation soft felt, Naki heat insulation board, Ruiji insulation soft felt.