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