... 2.Heat Insulating 3.Density:38-42kg/cbm 4.ISO9001:2000 ISO14001:2004 pu sandwich panelFeatures:1. Heat and ... manufacture effective.4. Energy conservation, environmental protection, economical, heat insulting, good structure, easy-doing construction5. Light weight ... , Big ribThickness of steel plate0.4-0.8mmHeat Insulating MaterialPU(Polyurethane)Unit Weight of Core Material38-42KG/m3Thickness ...