... 1.Fireproof 2.Heat Insulating 3.Light Weight 4.ISO9001:2000 ISO14001:2004 polyurethane/PU sandwich ... of manufacture effective.4. Energy conservation, environmental protection, economical, heat insulting, good structure, easy-doing construction5. Light weight ... plate0.5-0.8mmHeat Insulating MaterialPU(Polyurethane)Unit Weight of Core Material40KG/m3Thickness of Core Material40mm, 50mm, 75mm, 100mm, ...