Frp and polyurethane foam sandwich panels 1, Excellent price and quality 2, Light weight 3 ... plate/stainless steel panel2. Core material---The density of this(mineral)Rock wool is: 120- ... 120-250kg/m3,EPS 12-35kg/m3,PU 35-50kg/m3Conventional colorOcean blue, tephrosiouslifetime15~20 ... -seismic and impact resistance Largest span and height thin webbed wall Most civilized, environmental, high efficiency ...