Glass wool is a kind of fibrous material made of natural ores such as quartzite, dolomite, feldspar, limestone and so on, which are melted into glass fluid by adding in accessories such as Calcined soda and borax and then drawn, blown or thrown into very thin fibers by external force under fusing state. As a kind of inorganic fiber, glass wool has the following basic characteristics:

①  Possessing good thermal insulation performance under both high and low temperatures.
②  Neither burns, nor gives off harmful gas, so it is recognized as “statutory incombustible material” by many countries.
③  Possessing uniform resilience force.
④  With low moisture absorption rate under humid conditions.
⑤  With low coefficient of linear expansion.
⑥  With low aging rate, being able to maintain the original performance after long-time use.
⑦  Possessing excellent handling characteristics.

As a kind of very good heat preserving, heat insulating, cold insulating and sound absorbing material for various industrial equipment, traffic facilities such as pipelines, storage tanks, boilers, heat exchangers, fans, vehicles and vessels, as well as various buildings, glass wool products are widely employed in industrial sectors such as national defense, petrochemical, construction, metallurgy, cold storage, traffic, etc, particularly the construction industry. Glass wool products are mainly used in construction industry. In developed industrial countries, consumption of glass wool products in the construction sector accounts for more than 80% of their production, and in Japan, the percentage is even as high as 90%. Due to energy-saving requirement for residence at present, demand for glass wool products in many countries of the world is still increasing.