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