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