The first layer is applied to {TAIL ~ at least a portion} of the core and contains {HEAD ~ a first polymer} 
The first layer is applied to { TAIL ~ at least a portion } of the core and contains { HEAD ~ a first polymer }
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD