{HEAD ~ The synthetic fiber} is present in {TAIL ~ the insulation paper} in an amount between approximately 2 and 25 percent by weight 
{ HEAD ~ The synthetic fiber } is present in { TAIL ~ the insulation paper } in an amount between approximately 2 and 25 percent by weight
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH