A process and apparatus for producing sub micron fibers, and {TAIL ~ more specifically a process} and apparatus for effecting formation of sub micron fibers by fibrillation of polymer films, and {HEAD ~ nonwoven materials} and articles incorporating them 
A process and apparatus for producing sub micron fibers , and { TAIL ~ more specifically a process } and apparatus for effecting formation of sub micron fibers by fibrillation of polymer films , and { HEAD ~ nonwoven materials } and articles incorporating them
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH