{TAIL ~ The synthetic fiber component}, on the other hand, retains its mechanical strength even while {HEAD ~ the wood pulp fiber component} loses its strength 
{ TAIL ~ The synthetic fiber component } , on the other hand , retains its mechanical strength even while { HEAD ~ the wood pulp fiber component } loses its strength
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH