... damping, fire-retardnat,quakeproof, insulation, environmental friendly. we supply FRP PP honeycomb sandwich panel;,which is most popular light ... weight ,stiffness composite board in practice. FRP as skin panel on both sides, PP honeycomb as core. They ... weight, high stiffness, sound damping, fire-retardnat,quakeproof, insulation, environmental friendly. They are applicable to the apartments and ...