Process of forming a nanofiber non-woven containing particles
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United States of America Patent
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Aug 5, 2014
Grant Date -
Mar 29, 2012
app pub date -
Sep 29, 2010
filing date -
Sep 29, 2010
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Abstract
A process for forming a nanofiber non-woven includes mixing a first and second thermoplastic polymer and a plurality of particles, then subjecting the mixture to elongational forces when the first and second polymers are in a softened condition forming nanofibers of the first polymer. Next, the mixture is brought to a condition where the temperature is below the softening temperature of the first polymer forming a first intermediate. The first intermediate is consolidated forming the second intermediate where at least 70% of the nanofibers are fused to other nanofibers. Next, at least a portion of the second polymer is removed and at least 50% of the particles are positioned adjacent a surface of the nanofibers.
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