Low Density Structural Laminate

A structural laminate comprising:

• a core layer disposed between and bonded to each of a first metal skin layer and a second metal skin layer, the first and second metal skin layers each having a thickness selected from about 0.0005 and about 0.030 inches, the core layer comprising a low density composite layer being selected from at least one of a low density natural-fiber plastic composite and a mixture of thermoplastic resin and natural fiber, wherein the low density composite layer is a flattened low density composite having a uniform thickness selected from about 0.075 and about 0.5 inches;
• wherein the core further comprises;
• a first adhesive layer, having a thickness selected from about 0.0005 and about 0.010 inches, interposed between the first metal skin layer and the low density composite layer;
• and a second adhesive layer, having a thickness selected from about 0.0005 and 0.010 inches, interposed between the second metal skin layer and the low density composite layer;
• wherein the first and second adhesive layers comprise a reactive hot melt polyurethane adhesive;
• and
• wherein said structural laminate is in the form of a panel comprising a door or wall panel of an automotive truck or trailer.