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