Thermal Insulation Principle Of Glass Wool

Thermal Insulation Principle Of Glass Wool

Compared with liquids and solids, gases have lower thermal conductivity. 

Therefore, if they can be trapped in the material, they will become good insulating materials, so that a large amount of heat flowing through the material is forced to flow through the gas.

In order to further improve the efficiency of the gas, it may be split into small gas chambers with natural convection that cannot effectively transfer heat through natural convection, involving large overall gas flow driven by buoyancy and temperature difference.

It does not work well in small gas chambers with poor density, and the ratio of the surface area to the volume of the small gas chamber will prevent the volume gas from flowing through the viscous resistance. In order to complete the formation of small air chambers in artificial thermal insulation materials, glass and polymer materials can be used to reduce air capture into foam structures. The same principle used in glass wool can also be used for other artificial insulators. For example, rock wool, polystyrene foam plastic, aerated concrete, rubber plastic sponge, etc.

Gas trapping is also the insulation principle used for down and insulating hair in nature, such as feathers on birds and fur on cattle and sheep.