Glass wool is usually divided into glass wool felt and glass wool board. Glass wool felt is usually used in roofs, attics, and steel roofs for thermal insulation. Glass wool board is usually used in wall construction, such as internal wall and external wall thermal insulation. Glass wool products are very common in the construction industry, and the price is relatively cheap, the cost is relatively low.

The glass wool also has the quality difference, how to distinguish it? First of all, we need to know that the raw material of glass wool is high-speed drawing of glass through centrifuge. Good glass wool will not feel so tangled, because the glass fiber is relatively slender. There will be some used glass wool ginseng in the not good glass wool. The glass fiber is relatively short and it is more tied. The price difference between the two quality is not great.

And if you want to have a good thermal insulation effect, you can superimposed to use different densities and different thicknesses of glass wool, the thermal insulation effect will be better, and the sound absorption effect will be better. In addition, the glass wool packaging is usually packed in plastic bags if it is used domestically, and if it is exported, it is usually vacuum packed, so that more goods can be packed in the container, which is cost-effective. But for vacuum packaging, due to the relatively long shipping time and the compression of glass wool for too long, it takes some time for the glass wool to rebound after the package is opened. This rebound rate is also a factor that tests the quality of glass wool. Sometimes it is not because the thickness of glass wool is not enough, but because the vacuum packaging time is too long, it is impossible to restore 100% to the original thickness, so we need to have some understanding of this knowledge.