Glass wool felt is a roll-form thermal insulation material manufactured primarily from glass wool by applying a binder and subjecting it to heat curing; it is classified as an artificial inorganic fiber product. Its raw materials consist of natural ores-such as quartz sand, limestone, and dolomite-alongside chemical raw materials like soda ash and borax. After being melted, these materials are processed via blowing or centrifugal spinning techniques to form a flocculent, interwoven fiber structure. The product is characterized by its low bulk density (10–72 kg/m³), excellent resilience, and low thermal conductivity (0.037 W/m·K); it serves a dual function of thermal insulation and sound absorption/vibration damping, demonstrating significant effectiveness in absorbing low-to-medium frequency noise and mechanical vibrations. Standard product specifications typically range from 3 to 20 meters in length and 1200 mm in width, with thicknesses ranging from 15 to 180 mm; the material can be cut to size as needed for installation.
It is primarily utilized for the thermal insulation of indoor steel structures in buildings, ductwork insulation, pipe and wall insulation, as well as for noise reduction in transportation vehicles and refrigeration equipment. Products featuring an aluminum foil facing offer resistance to thermal radiation, making them suitable for use as interior lining in high-temperature workshops and equipment rooms. Product variants include partition glass wool felt, sound-absorbing ceiling panels, and glass wool pipe shells; notably, when centrifugal glass wool is installed discreetly behind perforated panels, its sound-absorbing performance is significantly enhanced.
Glass wool felt is a widely utilized thermal insulation material, finding extensive application in the fields of building insulation, equipment thermal protection, and noise control. It is manufactured using glass as the primary raw material; after being melted at high temperatures, it is spun centrifugally into fibers, to which a binder is then added before undergoing a heat-curing process to form the final felt-like product.
English alternative names for glass wool felt include: glass wool blanket, blanket of glass wool, glass fiber felt, glass wool quilt, glass fiber mat, and glass fiber blanket.