What is the thermal resistance of 140 thick polystyrene board?

M2k/w polystyrene insulation board is a new type of hard environmental protection and energy-saving foamed plastic board, which is made by heating and mixing polystyrene resin and polymer, injecting catalyst, and then continuous closed-cell foaming and extrusion. Its interior is an independent closed bubble structure, which has high compression resistance, thermal resistance m2k/w and total thermal resistance M2K/W. ..