The nozzle and speed are so selected as to cause {HEAD ~ an abrupt temperature drop} in the flow medium within the nozzle which causes the melt to solidify into {TAIL ~ fibers} 
The nozzle and speed are so selected as to cause { HEAD ~ an abrupt temperature drop } in the flow medium within the nozzle which causes the melt to solidify into { TAIL ~ fibers }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL