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