insulation glass wool felt with cerficate 1.sound insulation 2.Thermal insulation 3.Thernal radiation 4. Heat insulation 1. Materialglass wool felt insulation is made of inorganic fiber. Using reinforced fiber, limestone,quanz sand, ores as main materials, coordinating with some chemical materials, such as soda ash, borax.2. Physical properties of glass wool felt insulation itemunitindexmeasured ...