... exported different kinds of panel, such as polystyrene sandwich panel, rock wool sandwich panel. Features Polystyrene Sandwich Panel:1) Structure: a) ... metal sheets or decorative polywood sheets b) Middle: condensed polystyrene foam board2) Width: 1,000mm, 1,180mm3) Thickness: 40mm, ... , thehigher the degree of combustion)6) Rock wool panel achieves a notable reduction in air borne sound transfer, ...