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