The Insulation Principle Of Rock Wool Boards Is As Follows:

The insulation principle of rock wool boards does not stem from the material itself being an insulator that is a "thermal conductor," but rather cleverly utilizes the fundamental principle of physics that "air is a poor conductor of heat." Its secret lies entirely in its unique microstructure.

Under a microscope, the interior of a rock wool board consists of countless fine, non-directional inorganic fibers intricately interwoven, forming a three-dimensional, open network structure. This vast fiber network divides the air into countless extremely tiny, relatively closed air pockets or cavities. This air is firmly locked within the fibers, preventing convective heat transfer.

Heat transfer occurs in three ways: conduction, convection, and radiation. In rock wool boards:

1. Conduction: Although the thermal conductivity of solid rock wool fibers is not high, it is not the key to insulation. The key lies in the "still air" encased within, whose extremely low thermal conductivity greatly increases the difficulty of heat conduction throughout the material.

2. Convection: Because the air is divided into small spaces, large-scale airflow circulation cannot be formed, and convective heat transfer is essentially eliminated.

3. Radiation: Rock wool fibers themselves also have a certain absorption and scattering effect on thermal radiation.