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