pu sandwich panel 1.Fireproof 2.Heat Insulating 3.Density:38-42kg/cbm 4.ISO9001:2000 ... ISO14001:2004 pu sandwich panelFeatures:1. Heat and sound insulation. Temperature suitable for PU ranges from -200 ... process of manufacture effective.4. Energy conservation, environmental protection, economical, heat insulting, good structure, easy-doing construction5. Light weight enough to ...