... Tech: Automatic rolling machines make the whole process of manufacture effective.4. Energy conservation, environmental protection, ... kindergarten, model house for apartment, ommercial building, remodeling of old structures, warehouse, steel structure house,workshop, work ... 4-0.8mmHeat Insulating MaterialPU(Polyurethane)Unit Weight of Core Material36-45KG/m3Thickness of Core Material40mm, 50mm, 75mm, ...