Glass wool is a category in glass fiber, is a kind of artificial inorganic fiber. Using quartz sand, limestone, dolomite and other natural ore as the main raw materials, with some soda ash, borax and other chemical raw materials into glass. In the molten state, with external force, blown into a flocculent fine fiber, fiber and fiber between the three-dimensional cross, intertwined with each other, showing a lot of small gaps. This gap can be seen as porosity. Therefore, glass wool can be regarded as porous materials, with good insulation, sound absorption performance.