{HEAD ~ Polyisobutylene} is disposed on {TAIL ~ the surface} of the fibers to form treated fibers having a treated thickness 
{ HEAD ~ Polyisobutylene } is disposed on { TAIL ~ the surface } of the fibers to form treated fibers having a treated thickness
HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH