... advantage :light material ,airtight, anticorrosion ,aging resistance XPS Heat Insulation Foamed Plate Extrusion Production Line Has a perfect closed-pore alveolate structure ... of steam pervasion are all lower than those of other board heat preservation materials and they have the characteristic of strong ... motor power ( k w ) 75 5590 9055 55Thickness of board ( mm ) 20,25,30,40,5060,75,10040,50, ...