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