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