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