... insulation,heat preservation, fireproof,sound absorption Fiberglass Needle Mat are of superior heat insulation,heat preservation,fireproof,sound ... .50.80.5AllowanceFiberglass needle mat Thermal Conductivity Temperature25°100°200°300°400°500°600°700°Thermal Conductivitykcal/mhr0.0300 ... .0370.0480.0580.0760.0940.1120.16Fibreglass needle mat Absorption and ...