The synthetic fibers thus function as a reinforcing web or backbone to maintain some mechanical integrity and {HEAD ~ strength} of {TAIL ~ the paper} 
The synthetic fibers thus function as a reinforcing web or backbone to maintain some mechanical integrity and { HEAD ~ strength } of { TAIL ~ the paper }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL