By the term ‘substantially’ is meant that about 90 percent or more of {TAIL ~ the opening surface portion} includes {HEAD ~ less than about 5 percent polymer residue} 
By the term ‘ substantially ’ is meant that about 90 percent or more of { TAIL ~ the opening surface portion } includes { HEAD ~ less than about 5 percent polymer residue }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD